Herbarium LE - Specimens

Orchidaceae

Oberonia cavaleriei Finet

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Lithophytic herb on shady vertical cliff near hill top. Locally common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2990.

Trilliaceae

Paris polyphylla Sm.?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial herb to 1.5 tall with whorl of 6 leaves. Tepals grassy green. Locally common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2989.

Cycadaceae

Cycas hoabinhensis L.K.Phan & T.H.Nguyen

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial and lithophytic palm-like tree with stem to 1 m tall and to 25 cm in diameter. Leaves to 2 m long. On rocky places and cliffs near and on rocky hill top. Locally common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2988.

Rubiaceae

Ophiorrhiza sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial and lithophytic herb 0.7–0.8 m tall along rocky stream. Leaves above dark green, below dull purple or pale green. Flowers white. Not common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2987.

Euphorbiaceae

Excoecaria sp.⁣

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Shrub about 2 m tall on mossy rocky hill top. Flowers yellow. Not common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2986.

Asteraceae

Gynura procumbens Merr.?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Erect or climbing hithophytic herb to 1 m tall on open mossy rocks on hill top. Flowers yellow to orange. Occasional.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2985.

Polypodiaceae s.l. (Tectariaceae)

Tectaria sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial and lithophytic fern with fronds to 1.5 m long. Common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2984.

Orchiodaceae

Calanthe odora Griff.

Dak Lak Province, Krong Bong District, Yang Mao.

18 June 2024, Nguyen Phi Tam, AL3254 (photo only).

Orchiodaceae

Corybas himalaicus (King & Pantl.) Schltr.

Lao Cai Province, Bat Xat District, Y Ty commune, evergreen broad-leaved forest on granite at elevation of about 2000 m a.s.l.

14 June 2024, [Phu Xa Be] Truong Ba Vuong, Nguyen Van Canh, AL3253(photo only).

Orchiodaceae

Corybas annamensis Aver.

Lao Cai Province, Bat Xat District, Y Ty commune, evergreen broad-leaved forest on granite at elevation of about 2000 m a.s.l.

14 June 2024, [Phu Xa Be] Truong Ba Vuong, Nguyen Van Canh, AL3252 (photo only).

Myrsinaceae

Ardisia sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Treelet 3–4 m tall on rocky steep slope. Flowers pink purple. Occasional.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2983.

Orchidaceae

Bulbophyllum sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Creeping epiphyte on tall tree near mountain top. Occasional.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2982a.

Urticaceae

Elatostema sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Lithophytic herb to 0.5 m tall on stream rocks. Very common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2982.

Amaranthaceae

Cyathula prostrata (L.) Blume⁣

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial herb to 0.5 m tall in wet rocky place along stream. Common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2979.

Maranthaceae

Phrynium sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Erect terrestrial herb to 2 m tall in wet rocky place along stream. Flowers white, floral bracts dark purple. Common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2978.

Tiliaceae

Ambroma augusta L.f.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Treelet 2.5–3 m tall in open rocky place along stream. Flowers dark purple brown. Occasional.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2977.

Piperaceae

Zippelia begoniifolia Blume

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Erect terrestrial herb to 0.5 m tall in shady wet place on alluvial soil between limestone hills. Flowers white. Locally very common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2976.

Anthericaceae

Chlorophytum malayense Ridl.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial rosulate herb in shady wet place on alluvial soil between limestone hills. Flowers white. Occasional.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2975.

Sterculiaceae

Sterculia nobilis Sm.?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Treelet about 1.5 m tall in shady rocky slope along stream. Flowers dull pink. Occasional.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2974.

Polypodiaceae s.l. (Pteridaceae)

Pteris sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial and lithophytic fern with fronds to 2 m long in open rocky place along stream. Very common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2973.

Trilliaceae

Paris polyphylla Sm.?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial herb to 1.2 m tall on shady rocky slope. Flowers grassy green, anthers yellow. Occasional.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2972.

Saurauiaceae

Saurauia sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Treelet 3-4 m tall in open rocky place along stream. Flowers pink. Common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2971.

Orchidaceae

Liparis sootenzanensis Fukuy.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial herb on shady steep rocky slope along stream. Locally common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2970.

Solanaceae

Solanum sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial herb or undershrub to 2 m tall in open rocky slope along steam. Flowers white, fruits edible. Locally common. Usual weed.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2969.

Melastomataceae

Pseudodissochaeta assamica (C.B.Clarke) Nayar?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Climbing shrub to 3 m tall with pendulous shoots on shady rocky wet stream slope. Flowers pink purple, anther yellowish white. Occasional.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2968.

Pentaphragmaceae

Pentaphragma gamopetalum Gagnep.?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial herb on shady rocky wet slope. Flowers white. Not rare.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2967.

Aristolochiaceae

Asarum balansae Franch.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial herb on shady rocky wet slope. Flowers dirty greenish brown. Not rare.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2966.

Sterculiaceae

Sterculia lanceolata Cav.?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Treelet 2.5-3 m tall on steep rocky stream slope. Fruits bright red. Occasional.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2965.

Solanaceae

Lycianthes biflora (Lour.) Bitter?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Herb to 0.5 m tall among open stream rocks. Flowers white, fruits bright red. Not common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2964.

Apocynaceae

Wrightia sp.?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Woody vine to 15 m long in closed forest along rocky stream. Flowers pink to light purple. Not common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2963.

Saxifragaceae

Dichroa hirsuta Gagnep.?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Shrub about 1.5 m tall among stream rocks in open place. Flower buds light blue. Not common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2962.

Convallariaceae

Aspidistra bogneri Tillich?

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial rhizomatous herb with very rigid, dark green leaves to 1 m long in shady place. Not rare.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2961.

Primulaceae

Lysimachia sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Secondary broad-leaved evergreen humid forest with tall bamboo and bananas on very steep alluvial slopes on sandstone mixed with solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial herb 25–35 cm tall on shady wet slope along trail. Flowers yellow. Locally common.

03 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2960.

Rubiaceae

Mussaenda sp.

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Climbing shrub to 1.5 m tall in jpen slope. Flowers yellow, floral bract pure white. Common.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2959 (photo only).

Clusiaceae

Garcinia tinctoria W.Wight

Bac Kan Province, Ba Be District, Ba Be National Park. Dry evergreen broad-leaved secondary forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone along lake shore on point 22º25’46’’N 105º36’58’E at elev. of about 200 m a.s.l. Tree to 20 m tall. Fruits light green. Occasional.

28 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2957.

Meliaceae

Chukrasia tabularis Wight & Arn.

Bac Kan Province, Ba Be District, Ba Be National Park. Dry evergreen broad-leaved secondary forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone along lake shore on point 22º25’46’’N 105º36’58’E at elev. of about 200 m a.s.l. Tree to 25 m tall. Flowers yellowish green, very fragrant.

28 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2956.

Cycadaceae

Cycas brachycantha K.D.Hill, T.H.Nguyen & L.K.Phan

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Lithophytic palm-like plant with erect stem to 0.5 m tall and leaves to 2.5 m long on shelves of very steep rocky slope along rocky ridge edge. Locally very common. Male specimen.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2955.

Celastraceae

Euonymus laxiflorus Champ. ex Benth.?

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Treelet 2-2.5 m tall on shady rocky slope. Flowers pink. Occasional.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2954.

Arecaceae

Arenga caudata (Lour.) H.E.Moore

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Miniature palm to 1.5 m tall in rocky open place between remnant hills. Occasional.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2953.

Rutaceae

Clausena indica Oliv.

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Treelet to 8 m tall in open rocky slope. Fruits reddish. Not rare.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2952.

Polypodiaceae

Tectaria sp.

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Terrestrial fern in shady depression between limestone hills. Common.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2951.

Ebenaceae

Diospyros sp.

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Tree to 15 m tall in shady depression between limestone hills. Fruits and calyx green. Not common.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2950.

Orchidaceae

Calanthe alismifolia Lindl.

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Terrestrial herb in shady depression between limestone hills. Not common.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2949.

Icacinaceae

Iodes vitiginea Hance

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Semi-woody vine 6-7 m long in open secondary forest along fiend border. Flowers yellowish. Common.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2948.

Zingiberaceae

Amomum sp.?

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Terrestrial and lithophytic herb to 2 m long with ascending and erect inflorescence to 30 cm tall on very steep rocky slope near remnant hill top. Flowers white, lip with reddish and yellow center. Locally common.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2947.

Annonaceae

Mitrephora maingayi Hook.f. & Thomson

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Treelet 6-8 m tall in shady place. Flowers white to yellowish, fragrant. Occasional.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2946.

Polypodiaceae (Apleniaceae)

Asplenium nidus L.,

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Lithophytic rosulate fern along rocky ridge edge. Not rare.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2945.

Convallariaceae

Aspidistra babensis K.S.Nguyen, Aver. & Tillich

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Terrestrial herb with underground rhizome, leaves very rigid, almost black. Locally abundant.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2944.

Cycadaceae

Cycas brachycantha K.D.Hill, T.H.Nguyen & L.K.Phan

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Lithophytic palm-like plant with erect stem to 0.5 m tall and leaves to 2.5 m long along rocky ridge edge. Locally very common. Female specimen.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2943.

Cycadaceae

Cycas brachycantha K.D.Hill, T.H.Nguyen & L.K.Phan

Bac Kan Province, Ba Be District, Cao Thuong Community, Ba Be National Park. Dry secondary evergreen broad-leaved forest on steep rocky slope composed by white crystalline marble-like highly eroded limestone around point 22º27’42’’N 105º34’41’E at elevation of 700–800 m a.s.l. Lithophytic palm-like plant with erect stem to 0.5 m tall and leaves to 2.5 m long along rocky ridge edge. Locally very common. Male specimen.

27 April 2024, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, T. Maisak, AL2942.