Гербарий БИН РАН - Образцы

Annonaceae

Mitrephora macclurei Weeras. & R.M.K. Saunders

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Tree 6-7 m tall in open rocky place. Flowers yellow, internal tepals light pale pink-purple. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1564.

Orchidaceae

Goodyera hispida Lindl.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Lithophytic creeping herb on shady mossy rocks. Leaves dull velvety green with light green median stripe and white nerves. Not common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1565.

Orchidaceae

Liparis bootanensis Griff.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Creeping lithophytic herb on shady mossy rocks. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1566.

Poaceae (Bambusoideae)

Vietnamcalamus sp.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Woody grass about 3 m tall on rocky top of mountain. Very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1567.

Orchidaceae

Podochilus khasianus Hook.f.,

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Lithophytic clustering herb on shady mossy rocks. Not rare. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1568.

Gesneriaceae

Paraboea nutans D. Fang & D.H. Qin

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Lithophytic rosulate herb on shady mossy vertical cliff. Leaves dark green above, almost gray-white below. Not common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1569.

Orchidaceae

Bulbophyllum longibrachiatum Z.H. Tsi

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Creeping lithophytic and epiphytic herb. Leaves purple-violet below. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1570.

Begoniaceae

Begonia pseudodryadis C.Y. Wu var. bitepala Aver., var. nov.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Rosulate lithophytic herb on vertical shady mossy cliff. Leaves dark olive-green with irregular whitish spots above, pale purple with light greenish spots below. Flowers light pink-purple, anther yellow. Locally common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1571.

Orchidaceae

Bulbophyllum sp.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Creeping epiphyte on old mossy tree. Occasional. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1572.

Orchidaceae

Habenaria calcicola Aver.?

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial tuberiferous herb in shady place among rocks. Common.

11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1574.

Polypodiaceae s.l.

Antrophyum callifolium Blume

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Lithophytic fern on shady mossy cliff. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1575.

Convallariaceae

Ophiopogon latifolius L. Rodr.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial herb with stem 0.6-0.7 m tall in shady place among rocks. Flowers almost white. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1576.

Cupressaceae

Calocedrus rupestris Aver. & T.H.Nguyên & P.K.Lôc

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Tree 7 m tall on mountain top. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1577.

Clusiaceae

Garcinia sp.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Tree 10-15 m. Fruits green. Very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1578.

Polypodiaceae s.l. (Tectariaceae)

Tectaria polymorpha (Wall. ex Hook.) Copel.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial fern in shady rocky place. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1573.

Polypodiaceae s.l. (Tectariaceae)

Tectaria polymorpha (Wall. ex Hook.) Copel.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial fern in shady rocky place. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1573.

Convallariaceae

Rohdea wattii (C.B.Clarke) Yamashita & M.N.Tamura (= Tupistra wattii (C.B. Clarke) Hook.f.)

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial herb in shady place among rocks. Flowers and flower bracts green. Very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1579.

Poaceae (Bambusoideae)

Neomicrocalamus prainii (Gamble) Keng f.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Woody grass with pendulous stems to 10 m long on very steep rocky slopes and cliffs. Locally very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1580.

Orchidaceae

Calanthe herbacea Lindl.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial herb in shady rocky place. Not common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1581.

Euphorbiaceae

Trigonostemon thyrsoideus Stapf

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Treelet of shrub 3-5 m tall and 3-4 cm in diameter. Fruits light green. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1582.

Polypodiaceae s.l.

Polystichum deltatum Li Bing Zhang, M.Q. Han & Yan Liu

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Lithophytic fern on steep rocky slope. Very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1583.

Gesneriaceae

Ornithoboea wildeana Craib

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Lithophytic herb to 1 m tall on steep rocky slope. Very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1584.

Orchidaceae

Malaxis ophrydis (J. Koenig) Ormerod

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial herb in shady place among rocks. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1585.

Orchidaceae

Phaius mishmensis Rchb.f.,

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial herb in shady place among rocks. Flowers pinkish. Not common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1586.

Polypodiaceae s.l.

Asplenium unilaterale Lam.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial and occasionally lithophytic fern on shady very steep rocky slope. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1587.

Myrsinaceae

Ardisia sp.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Treelet 2-3 m tall on shady very steep rocky slope. Fruits glossy green speckled with small whitish spots. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1588.

Gesneriaceae

Hemiboea malipoensis Y.H. Tan

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial herb to 1.5 m tall on shady very steep rocky slope. Flowers yellow. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1589.

Rubiaceae

Ophiorrhiza sp.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Terrestrial herb to 1.5 m tall on shady very steep rocky slope. Flowers white with greenish apex. Very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1590.

Fagaceae

Castanopsis sp.?

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Tree to 12-15 m tall, bars brown. Very common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1591.

Vitaceae

Cayratia corniculata Gagnep.

Ha Giang Prov., Quan Ba Distr., Can Ty Commune, Sin Suoi Ho Village, around point 23.09566ºN 105.02142ºE. Very steep mountain slopes composed of solid highly eroded karstic limestone at elevation 800–1000 m a.s.l. Remnants of primary evergreen broad-leaved and coniferous (with Calocedrus rupestris and Xanthocyparis vietnamensis) humid forest. Herbaceous or semiwoody vine to 4 m long in open rocky place. Fruits white. Common. 11 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1592.

Convallariaceae

Disporopsis longifolia Craib

Ha Giang Prov., Quan Ba Distr., Quan Ba Village street market. Wild collected terrestrial herb to 2 m tall sold as a medicinal plant. Rhizome to 8 cm in diam, fruits glossy green. 13 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1593.

Burseraceae

Canarium album Blanco?

Ha Giang Prov., Quan Ba Distr., Thai An Commune, Seo Lung Two Village, around point 22.96988ºN 105.08646ºE. Very steep mountain slopes composed of stratified shale and clayey subsoil at elevation 800–1000 m a.s.l. Primary and secondary evergreen broad-leaved humid forest. Tree to 30 m tall on steep slope. Not rare. 10 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1598 (photo only).

Orchidaceae

Paphiopedilum henryanum Braem

Ha Giang Prov., Quan Ba Distr., Quan Ba Village street market. Wild collected lithophytic rosulate sold as an ornamental plant. Median tepal yellowish with maroon spots, lip punk-purple. Almost extinct in the nature in the area. 13 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1594.

Polypodiaceae s.l. (Athyriaceae)

Diplazium opacum (Don) Christ

Ha Giang Prov., Quan Ba Distr., Thai An Commune, Seo Lung Two Village, around point 22.96988ºN 105.08646ºE. Very steep mountain slopes composed of stratified shale and clayey subsoil at elevation 800–1000 m a.s.l. Primary and secondary evergreen broad-leaved humid forest. Terrestrial fern on very steep wet shady slope. Fronds to 2 m long. Very common. 10 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1500.

Verbenaceae

Clerodendrum kwangtungense Hand.-Mazz.

Ha Giang Prov., Quan Ba Distr., Thai An Commune, Seo Lung Two Village, around point 22.96988ºN 105.08646ºE. Very steep mountain slopes composed of stratified shale and clayey subsoil at elevation 800–1000 m a.s.l. Primary and secondary evergreen broad-leaved humid forest. Treelet or shrub 3-4 m tall. Calyx pink, fruits black. Occasional. 10 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1498. Det.: Chen Yaping 08.12.2019

Urticaceae

Elatostema radicans Wedd.

Ha Giang Prov., Quan Ba Distr., Thai An Commune, Seo Lung Two Village, around point 22.96988ºN 105.08646ºE. Very steep mountain slopes composed of stratified shale and clayey subsoil at elevation 800–1000 m a.s.l. Primary and secondary evergreen broad-leaved humid forest. Terrestrial herb on very steep wet shady slope. Flowers dirty violet. Occasional. 10 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1497. Det.: Fu Longfei 09.12.2019

Betulaceae

Betula alnoides Buch.-Ham.

Ha Giang Prov., Quan Ba Distr., Thai An Commune, Seo Lung Two Village, around point 22.96988ºN 105.08646ºE. Very steep mountain slopes composed of stratified shale and clayey subsoil at elevation 800–1000 m a.s.l. Primary and secondary evergreen broad-leaved humid forest. Semideciduous tree to 30 m tall. Very common. Co-dominant (or occasional mono-dominant) of the forest. 10 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1496.

Eriocaulaceae

Eriocaulon nigrum Lecomte?

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. Secondary evergreen broad-leaved humid forest. Terrestrial herb in open grassy place at the base of mountain. Inflorescences white. Common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1495b.

Eriocaulaceae

Eriocaulon duthiei Hook.f.?

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. Secondary evergreen broad-leaved humid forest. Terrestrial herb in open grassy place at the base of mountain. Inflorescences white. Common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1495a.

Parnassiaceae

Parnassia wightiana Wall.

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. Secondary evergreen broad-leaved humid forest along rocky stream. Terrestrial and lithophytic herb on open wet mossy stream rocks. Flowers white. Common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1494.

Balsaminaceae

Impatiens sp.

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Terrestrial herb to 1 m tall in open rocky place. Flowers orange. Not common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1493.

Pittosporaceae

Pittosporum glabratum Lindl.

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Shrub 2 m tall in open rocky place. Fruits dull yellowish, seeds red. Common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1492.

Caprifoliaceae

Viburnum sp.

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Tree 5-7 m tall and 5-7 cm in diameter with very hard timber locally used for handicrafts. Very common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1491.

Cornaceae

Cornus sp.

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Tree to 15 m tall and 20 cm in diam. Timber very hard with black nuclear timber. Common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1490.

Rubiaceae

Psychotria sp.?

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Shrub 2-3 m tall in open rocky place. Common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1489.

Violaceae

Viola annamensis Baker f.

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Terrestrial herb in open rocky place. Common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1488.

Begoniaceae

Begonia rhytidophylla Y.M. Shui & W.H. Chen

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Lithophytic rosulate herb on vertical cliffs. Leaves dark purple on both sides. Locally common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1487. Det.: Yu-Min Shui 20.12.2019

Gesneriaceae

Chirita sp.

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Lithophytic rosulate herb on vertical cliffs. Locally common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1486.

Gesneriaceae

Aeschynanthus superbus C.B. Clarke

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Epiphytic scandent undershrub on old mossy tree. Fruits green. Occasional. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1485.

Melastomataceae

Medinilla petelotii Merr.

Ha Giang Prov., Quan Ba Distr., Ta Van Commune, Can Ho Village, around point 23.03513ºN 104.87016ºE, steep rocky mountain slopes composed of eroded limestone at elevation 1100–1250 m a.s.l. near mountain top. Secondary evergreen broad-leaved humid forest. Epiphytic scandent undershrub on old mossy tree. Flowers pink to pink-purple. Common. 9 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1484.