Herbarium LE - Specimens

Acanthaceae

Cryptophragmium langbianense Benoist⁣

Dak Nong Province, Dak Song District, Nam Nung Nature Reserve around point 12.1200N 107.4233E. Fractionally logged primary evergreen broad-leaved and mixed forest with Dacrydium, Dacrycarpus and Pinus latteri on granite at elevation about 900 m a.s.l. Terrestrial herb to 0.3 m tall in shady wet place along forest stream. Leaves with white median line. Flowers white with violet marks. Locally common.

27 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, Nguyen Quoc Bao, AL 1814.

Acanthaceae

Acanthus sp.

Dak Nong Province, Dak Song District, Nam Nung Nature Reserve around point 12.1200N 107.4233E. Fractionally logged primary evergreen broad-leaved and mixed forest with Dacrydium, Dacrycarpus and Pinus latteri on granite at elevation about 900 m a.s.l. Terrestrial herb to 0.5 m tall in shady wet place along forest stream. Locally common.

27 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, Nguyen Quoc Bao, AL 1813.

Orchidaceae

Tainia penangiana Hook.f.

Dak Nong Province, Dak Song District, Nam Nung Nature Reserve around point 12.1200N 107.4233E. Fractionally logged primary evergreen broad-leaved and mixed forest with Dacrydium, Dacrycarpus and Pinus latteri on granite at elevation about 900 m a.s.l. Terrestrial herb in shady place. Tepals light greenish, lip white with many fine purple markings. Not rare.

27 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, Nguyen Quoc Bao, AL 1812.

Schizaeaceae

Actinostachys digitata (L.) Wall.

(=Schizaea digitata (L.) Sw.)

Dak Nong Province, Dak Song District, Nam Nung Nature Reserve around point 12.1200N 107.4233E. Fractionally logged primary evergreen broad-leaved and mixed forest with Dacrydium, Dacrycarpus and Pinus latteri on granite at elevation about 900 m a.s.l. Terrestrial fern to 30 cm tall in open wetland grassland among forest. Not common.

27 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, Nguyen Quoc Bao, AL 1810.

Asteraceae

“Anthemis”

Dak Nong Province, Dak Song District, Nam Nung Nature Reserve around point 12.1200N 107.4233E. Fractionally logged primary evergreen broad-leaved and mixed forest with Dacrydium, Dacrycarpus and Pinus latteri on granite at elevation about 900 m a.s.l. Terrestrial herb to 1 m tall in open wetland grassland among forest. Flowers bright yellow. Not rare.

27 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, Nguyen Quoc Bao, AL 1809.

Pinaceae

Pinus latteri Mason

Dak Nong Province, Dak Song District, Nam Nung Nature Reserve around point 12.1200N 107.4233E. Fractionally logged primary evergreen broad-leaved and mixed forest with Dacrydium, Dacrycarpus and Pinus latteri on granite at elevation about 900 m a.s.l. Tree toAquatic plant in small forest stream in open sunny place in shallow clean water. Flowers white. Not rare.

27 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, Nguyen Quoc Bao, AL 1808.

Hydrocharitaceae

Elodea canadensis Michx.?

Dak Nong Province, Dak Song District, Nam Nung Nature Reserve around point 12.1200N 107.4233E. Fractionally logged primary evergreen broad-leaved and mixed forest with Dacrydium, Dacrycarpus and Pinus latteri on granite at elevation about 900 m a.s.l. Aquatic plant in small forest stream in open sunny place in shallow clean water. Flowers white. Not rare.

27 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, Nguyen Quoc Bao, AL 1807.

Orchidaceae

Thrixspermum annamense (Guillaumin) Garay

Dak Nong Province, Dak Song District, Nam Nung Nature Reserve around point 12.1200N 107.4233E. Fractionally logged primary evergreen broad-leaved and mixed forest with Dacrydium, Dacrycarpus and Pinus latteri on granite at elevation about 900 m a.s.l. Epiphyte on small tree along road. Flowers white. Locally common.

27 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, Nguyen Quoc Bao, AL 1805.

Zingiberaceae

Alpinia sp.

Herbarium and photo prepared on 26 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, et al., AL 1780.

Plant originated from Dak Lak Province, M’Drak District, Chu Mu Mountain. Evergreen broad-leaved primary forest at elevation about 500 m a.s.l. Terrestrial herb to 1 m tall. Flowers: tepals light pink to white, median tepal bright red with yellow stripes. Not common.

FLORA OF VIETNAM

Myrsinaceae

Ardisia sp.

Dak Lak Province, Lak District, Krong No Municipality, around point 12.2520 N 108.3449 E. Old closed evergreen broad-leaved secondary forest on hill slopes composed with granite at elevation about 650 m a.s.l. Terrestrial undershrub about 0.5 m tall on shady slope. Flowers pink, fruits red, later glossy black. Not common.

23 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, et al., AL 1737.

FLORA OF VIETNAM

Melastomataceae

Sonerila tenera Royle

Dak Lak Province, Lak District, Krong No Municipality, around point 12.2520 N 108.3449 E. Old closed evergreen broad-leaved secondary forest on hill slopes composed with granite at elevation about 650 m a.s.l. Terrestrial herb 1-20 cm tall on shady road cut. Flowers light pink purple. Occasional.

23 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, et al., AL 1733.

Orchidaceae

Pteroceras teres (Blume) Holttum?

Dak Lak Province, Lak District, Krong No Municipality, around point 12.2520 N 108.3449 E. Old closed evergreen broad-leaved secondary forest on hill slopes composed with granite at elevation about 650 m a.s.l. Epiphyte on small tree along stream. Flowerrs yellowish, tepals with purple brownish marks. Rare.

23 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, et al., AL 1732.

FLORA OF VIETNAM

Orchoidaceae

Trias nasuta (Rchb.f.) Stapf

Dak Lak Province, Lak District, Krong No Municipality, around point 12.2520 N 108.3449 E. Old closed evergreen broad-leaved secondary forest on hill slopes composed with granite at elevation about 650 m a.s.l. Epiphyte on tall tree in shady place, flowers light yellow, lip purple. Occasional.

23 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, et al., AL 1730.

FLORA OF VIETNAM

Lamiaceae

Scutellaria sp.?

Dak Lak Province, Lak District, Krong No Municipality, around point 12.2520 N 108.3449 E. Old closed evergreen broad-leaved secondary forest on hill slopes composed with granite at elevation about 650 m a.s.l. Terrestrial herb to 20 cm tall, flowers with domination of light violet. Common.

23 November 2022, L. Averyanov, Nguyen Van Canh, T. Maisak, Truong Ba Vuong, et al., AL 1718.

Rubiaceae

Mycetia sp.?

Bac Kan Province, Ba Be District, Ba Be National Park. Evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Terrestrial herb to 1.5 m tall in open wet place on very steep rocky slope. Flowers light pale yellow. Occasional.

18 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1686.

Urticaceae

Elatostema sp.

Bac Kan Province, Ba Be District, Ba Be National Park. Evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Lithophytic herb on shady vertical limestone cliff near the road. Flowers dull greenish. Occasional.

18 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1685.

Hernandiaceae

Illigera sp.

Bac Kan Province, Ba Be District, Ba Be National Park. Evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Herbaceous vine 5–6 m long in open place on steep rocky slope. Flowers reddish brown. Not common.

18 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1684.

Gesneriaceae

Microchirita hamosa (R.Br.) Yin Z.Wang?

Bac Kan Province, Ba Be District, Ba Be National Park. Evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Annual terrestrial and lithophytic herb to 40 cm tall on vertical wet exposed road limestone cliff. Flowers blue to blue violet. Very common.

18 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1683.

Rubiaceae

Ridsdalea sp.nov.?

Ridsdalea vietnamensis (Tirveng.) J.T.Pereira (=Rothmannia vietnamensis Tirveng.) aff.

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250–300 m a.s.l. Tree 10-15 on shady rocky steep slope. Flower tube white outside, inside white with many reddish purple marks, pistil and anthers white. Not common.

18 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1682.

Rubiaceae

Ridsdalea sp.nov.?

Ridsdalea vietnamensis (Tirveng.) J.T.Pereira (=Rothmannia vietnamensis Tirveng.) aff.

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250–300 m a.s.l. Tree 10-15 on shady rocky steep slope. Flower tube white outside, inside white with many reddish purple marks, pistil and anthers white. Not common.

18 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1682.

Begoniaceae

Begonia truncatiloba Irmsch.

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial and lithophytic herb in shady wet humid valley between limestone hills. Leaves fluorescent with bright blue. Locally common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1681 (photo only).

Rubiaceae

Ridsdalea sp. nov.?

Ridsdalea vietnamensis (Tirveng.) J.T.Pereira (=Rothmannia vietnamensis Tirveng.) aff.

Bac Kan Province, Ba Be District, central part of Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone along Ba Be River at elevation about 250 m a.s.l. Tree 15-20 m tall on rocky slope in humid valley between limestone hills. Flowers white, inside tube with pale purple marks. Fruits broadly ellipsoid to almost globular, dark green, 4–5 cm in diameter, 4.5–8 cm long, inside with black jelly and (15)20–55(65) hard stony white (but with dark brown cover) triangular flattened seeds 1.5–1.8 mm broad. Occasional.

17 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1680.

Balsaminaceae

Impatiens verrucifer Hook.f.?

Bac Kan Province, Ba Be District, central part of Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone along Ba Be River at elevation about 250 m a.s.l. Lithophytic herb to 2 m tall with fleshy succulent stem in open place in humid valley between limestone hills. Common.

17 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1679.

Lamiaceae

Gen.?

Bac Kan Province, Ba Be District, central part of Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone along Ba Be River at elevation about 250 m a.s.l. Terrestrial herb to 2 m tall in open place in humid valley between limestone hills. Flowers yellow. Common.

17 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1678.

Gesneriaceae

Boea sp.?

Bac Kan Province, Ba Be District, central part of Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone along Ba Be River at elevation about 250 m a.s.l. Lithophytic herb on shady cliff and big rocks in humid valley between limestone hills. Not common.

17 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1677a.

Gesneriaceae

Boea sp.?

Bac Kan Province, Ba Be District, central part of Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone along Ba Be River at elevation about 250 m a.s.l. Lithophytic herb on shady cliff and big rocks in humid valley between limestone hills. Common.

17 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1677.

Convallariaceae

Peliosanthes sinica F.T.Wang & Tang

Bac Kan Province, Ba Be District, central part of Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone along Ba Be River at elevation about 250 m a.s.l. Terrestrial herb in shady wet place in humid valley between limestone hills. Leaves dark uniform green. Not common.

17 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1676.

Convallariaceae

Tupistra wattii Hook.f.

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Ascending herb with erect stem to 0.5 m tall on wet humid valley between limestone hills. Fruits glossy green. Occasional.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1672.

Asteraceae

Vernonia sp.?

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Herbaceous vine to 5 m long in open place on wet humid valley between limestone hills. Flowers yellow. Not rare.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1671.

Rubiaceae

Mycetia sp.?

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial erect herb to 1.5 m tall in open place on wet humid valley between limestone hills. Flowers yellow. Not common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1670.

Convallariaceae

Aspidistra sp.

Bac Kan Province, Ba Be District, central part of Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone along Ba Be River at elevation about 250 m a.s.l. Terrestrial herb in shady wet place in humid valley between limestone hills. Leaves dark uniform green. Not common.

17 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1675.

Orchidaceae

Tropidia angulosa (Lindl.) Blume

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial erect herb to 0.5 m tall on shady steep rocky cliff. Not common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1669.

Orchidaceae

Corymborkis veratrifolia (Reinw.) Blume

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial erect herb to 2.5 m tall on shady steep rocky cliff. Occasional.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1668.

Orchidaceae

Phaius flavus (Blume) Lindl.

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial and lithophytic herb on shady steep rocky cliff. Leaves uniform light green, sometimes with unclear yellow spots. Occasional.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1667.

Begoniaceae

Begonia sp. (“grandifolia rupestris”)

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Lithophytic herb of shady vertical cliff near hill top. Leaves uniform light green, sometimes with unclear palmate white spots. Not common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1666.

Convallariaceae

Ophiopogon sp.

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial and lithophytic herb in wet humid rocky valley between limestone hills. Occasional.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1665.

Orchidaceae

Habenaria sp.

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial and lithophytic tuberiferous herb to 0.6 m tall on shady rocky slope. Occasional.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1664.

Rubiaceae

Ophiorrhiza sp.nov.?

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Lithophytic herb to 0.6 m tall on exposed wet rocks in humid valley between limestone hills. Leaves dark green above, dark purple brown below. Flowers white to pale pink, flower tube white with violet tint. Locally common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1663.

Convallariaceae

Aspidistra superba Tillich

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial and lithophytic herb on shady wet and humid rocky valley between limestone hills. Leaves dark green. Locally common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1662.

Convallariaceae

Peliosanthes dasystachys Diels ex L.Rodr.?

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial and lithophytic herb on shady rocky steep slope. Flowers: tepals dull yellowish with violet tint, corona dull violet. Very common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1661.

Acanthaceae

Strobilanthes sp.

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Terrestrial and lithophytic herb to 1 m tall on shady rocky steep slope. Flowers blue. Not common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1660.

Orchidaceae

Phaius tonkinensis (Aver.) Aver.

Bac Kan Province, Ba Be District, Nam Mau Municipality, central part of Ba Be National Park. Rather dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu and Streblus asper on crystalline highly eroded rocky limestone at elevation 600-750 m a.s.l. Lithophytic herb to 1.5 m tall on shady rocks in humid wet valley between limestone hills. Tepals white, later yellow, lip dull yellowish with pale reddish spots. Locally common.

16 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1659.

Orchidaceae

Paphiopedilum concolor Pfitzer

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Lithophytic rosulate herb on limestone cliff. Flowers pale light yellow. Not common.

15 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1658 (photo only).

Orchidaceae

Cleisostoma fuerstenbergianum Kraenzl.

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Epiphyte on big Burretiodendron tree. Shoots pendulous to 0.5 m long. Not rare.

15 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1656.

Cucurbitaceae

Gynostemma pentaphyllum (Thunb.) Makino

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Herbaceous vine to 3 m long in open place. Common.

15 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1655d (photo only).

Tiliaceae

Burretiodendron hsienmu Chun & F.C.How

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Large tree to 30 m tall and 1 m DBH. Very common.

15 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1655c (photo only).

Arecaceae

Arenga pinnata (Wurmb) Merr.

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Large palm to 10 m tall. Very common.

15 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1655b (photo only).

Moraceae

Antiaris toxicaria (Pers.) Lesch.

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Tree 10-15 m tall. Occasional.

15 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1655a (photo only).

Acanthaceae

Asystasia sp.?

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Terrestrial herb to 1 m tall on shady rocky slope. Flowers white. Occasional.

15 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1655.

Orchidaceae

Geodorum sp.

Bac Kan Province, Ba Be District, Ba Be National Park. Dray evergreen broad-leaved old secondary forest with domination of Burretiodendron hsienmu, Streblus asper and Arenga pinnata on crystalline highly eroded rocky limestone near the boat station at elevation 250-300 m a.s.l. Terrestrial tuberiferous on shady rocky slope. Occasional.

15 November 2022, Nguyen Huu Cuong, Cao Xuan Hai, L. Averyanov, T. Maisak, AL 1654.