Herbarium LE - Specimens

Orchidaceae

Rhomboda petelottii (Gagnep.) Ormerod

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Terrestrial creeping herb with ascending erect stem to 25 cm tall, leaves almost black, velvety, with longitudinal white median vein. Not common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2404.

All photos © - L. Averyanov

Orchidaceae

Calanthe argenteo-striata C.Z.Tang & S.J.Cheng

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Lithophytic rosulate herb on shady rocks, leaves with white longitudinal stripes. Common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2403.

All photos © - L. Averyanov

Gesneriaceae

Paraboea sp.

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Adpressed rosulate herb on vertical limestone cliff on travertine deposits. Very rare.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2402.

All photos © - L. Averyanov

Cycadaceae

Cycas brachycantha K.D.Hill, H.T.Nguyen & P.K.Loc

Female plant cultivated in Ba Be National park originated from Bac Kan Province, Ba Be District, Ba Be National Park. Rocky outcrops in primary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º24’42’’N 105º38’06’E at elev. of about 700 m a.s.l. Erect palm-like tree 0.4-0.8 m tall. In observation of year 2001 & 2002 locally very common. Presently almost extinct due to overcollection for sale and cultivation as an ornamental plant.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2400.

All photos © - L. Averyanov

Cycadaceae

Cycas brachycantha K.D.Hill, H.T.Nguyen & P.K.Loc

Male plant cultivated in Ba Be National park originated from Bac Kan Province, Ba Be District, Ba Be National Park. Rocky outcrops in primary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º24’42’’N 105º38’06’E at elev. of about 700 m a.s.l. Erect palm-like tree 0.4-0.8 m tall. In observation of year 2001 & 2002 locally very common. Presently almost extinct due to overcollection for sale and cultivation as an ornamental plant.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2399.

All photos © - L. Averyanov

Euphorbiaceae

Sauropus sp.??

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Erect shrub to 2.5 m tall in open wet place. Flowers white. Not common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2398.

All photos © - L. Averyanov

Verbenaceae

Clerodendrum sp.

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Erect shrub to 3 m tall in open grassy place. Flowers white. Common secondary shrub in the area.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2397.

All photos © - L. Averyanov

Myrsinaceae

Ardisia phankelociana C.M. Hu & G. Hao

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Erect shrub to 1.5 m tall in shady rocky place. Not common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2396.

All photos © - L. Averyanov

Commelinaceae

Commelina sp. s.l.

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Erect lithophytic herb with erect stems to 3 m long, branching and creeping in apical part in shady rocks along ridge edge. Not ripe fruits glossy green. Not common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2395.

All photos © - L. Averyanov

Convallariaceae

Ophiopogon latifolius L.Rodr.

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Erect terrestrial herb to 0.4 m tall with rigid stilt roots in shady rocky place. Locally common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2394.

All photos © - L. Averyanov

Convallariaceae

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

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Terrestrial rhizomatous herb with underground thick rhizome in shady rocky place. Leaves very rigid, dark green to almost black. Locally very common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2393.

All photos © - L. Averyanov

Polypodiaceae s.l.

Thelypteris sp.?

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Terrestrial fern in shady rocky place. Locally common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2392.

All photos © - L. Averyanov

Polypodiaceae s.l.

Colysis sp.

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Creeping lithophytic fern in shady rocky place. Locally very common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2391.

All photos © - L. Averyanov

Aceraceae

Acer tonkinense Lecomte?

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Tree 15-20 m tall with bole to 0.3 m dbh on ridge top. Leaves below dirty purple. Common forest dominant.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2390.

All photos © - L. Averyanov

Anacardiaceae

Pistacia sp.?

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Tree 20-25 m tall with bole to 0.4 m dbh on ridge top. Common forest dominant.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2389.

All photos © - L. Averyanov

Orchidaceae

Goodyera fumata Thwaites

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Creeping, ascending and erect terrestrial herb to 0.5 m tall in shady rocky place. Not common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2388.

All photos © - L. Averyanov

Rosaceae

Agrimonia pilosa Ledeb.

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Erect terrestrial herb to 0.6 m tall in open grassy place. Flowers yellow. Not common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2387.

All photos © - L. Averyanov

Convallariaceae

Tupistra wattii Hook.f.

Bac Kan Province, Ba Be District, Ba Be National Park. Primary and old secondary evergreen broad-leaved forest on very steep rocky slopes composed by white crystalline marble-like highly eroded limestone around point 22º27’26’’N 105º36’12’E at elev. of 600-800 m a.s.l. Creeping, ascending and erect terrestrial herb to 0.5 m tall in shady rocky place. Locally very common.

30 October 2023, Nguyen Huu Cuong, Chu Ngoc Quan, L. Averyanov, Nguyen Van Ly, T. Maisak, AL2386.

All photos © - L. Averyanov