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Orchidaceae

Coelogyne cumingii Lindl.

Plant collected in Lam Dong Province, Lam Ha District in 2023 in evergreen broad-leaved forest on granithe at elevation of 1300–1500 m a.s.l. and cultivated in Ly Ngoc Quan private garden, Lam Dong Province, Lam Ha District, Phi To Village. Flowers white, lip with very light lemon center.

Photo and herbarium prepared in 11 May 2024, L. Averyanov, Nguyen Van Canh, T. Maisak, AL3151.

Orchidaceae

Dendrobium chryseum Rolfe

Plant obtained from local collectors from northern Vietnam in 2023 and cultivated in Ly Ngoc Quan private garden, Lam Dong Province, Lam Ha District, Phi To Village. Flowers bright yellow.

Photo and herbarium prepared in 11 May 2024, L. Averyanov, Nguyen Van Canh, T. Maisak, AL3150.

Cycadaceae

Cycas micholitzii Dyer

Dak Lak Province, Lak District, around Lieng Bok Sak Waterfall at elevation about 400 m a.s.l. Dry evergreen broad-leaved forest along rocky stream on granite. Terrestrial plant with underground caudex and 1­3 leaves to 1.5 m long on slopea of stream valley. Not rare.

11 May 2024, L. Averyanov, Nguyen Van Canh, T. Maisak, AL3149.

Orchidaceae

Dendrobium crumenatum

Dak Lak Province, Lak District, around Lieng Bok Sak Waterfall at elevation about 400 m a.s.l. Dry evergreen broad-leaved forest along rocky stream on granite. Epiphyte along rocky stream. Occasional.

11 May 2024, L. Averyanov, Nguyen Van Canh, T. Maisak, AL3148.

Orchidaceae

Coelogyne viscosa

Dak Lak Province, Lak District, around Lieng Bok Sak Waterfall at elevation about 400 m a.s.l. Dry evergreen broad-leaved forest along rocky stream on granite. Epiphyte and lithophyte along rocky stream. Occasional.

11 May 2024, L. Averyanov, Nguyen Van Canh, T. Maisak, AL3147.

Orchidaceae

Pholidota imbricata Lindl.

Dak Lak Province, Lak District, around Lieng Bok Sak Waterfall at elevation about 400 m a.s.l. Dry evergreen broad-leaved forest along rocky stream on granite. Epiphyte and lithophyte along rocky stream. Occasional.

11 May 2024, L. Averyanov, Nguyen Van Canh, T. Maisak, AL3146.

Solanaceae

Solanum sp.

Dak Lak Province, Lak District, around Lieng Bok Sak Waterfall at elevation about 400 m a.s.l. Dry evergreen broad-leaved forest along rocky stream on granite. Erect terrestrial herb to 1.5 m tall in open place along road. Flowers white, not ripe fruits pale green. Common.

11 May 2024, L. Averyanov, Nguyen Van Canh, T. Maisak, AL3145.

Convallariaceae

Aspidistra sp.

Dak Lak Province, Lak District, around Lieng Bok Sak Waterfall at elevation about 400 m a.s.l. Dry evergreen broad-leaved forest along rocky stream on granite. Terrestrial herb with short underground rhizome on steep rocky slope of stream canyon. Locally common.

11 May 2024, L. Averyanov, Nguyen Van Canh, T. Maisak, AL3143.

Orchidaceae

Cymbidium aloifolium (L.) Sw.⁣

Dak Lak Province, Ea’Hleo District, evergreen broad-leaved forest at elevation of about 300 m a.s.l., clustering lithophyte, obtained from local collectors in 2014.

10 May 2024, Nguyen Van Canh garden, AL3140.

Asclepiadaceae

Hoya graveolens Kerr

Dak Lak Province, Ea’Hleo District, evergreen broad-leaved forest at elevation of about 300 m a.s.l., lithophytic vine, obtained from local collectors in 2014.

10 May 2024, Nguyen Van Canh garden, AL3139.

Asclepiadaceae

Hoya diversifolia Blume

Dak Lak Province, Chu Yang Sing Mountain, Chu Yang Sinh National Park, evergreen broad-leaved forest at elevation of 400-500 m a.s.l., lithophytic vine, obtained from local collectors in 2014.

10 May 2024, Nguyen Van Canh garden, AL3138.

Asclepiadaceae

Hoya thuhae Aver., Vuong & V.C.Nguyen

Dak Lak Province, Yok Don National Park, Dipterocarp forest at elevation of about 200 m a.s.l., living plant obtained from local collectors in 2018 by Nguyen Van Canh. Herbarium specimen and photos were made from plants cultivated in Buon Ma Thuot on 10 May 2024, Nguyen Van Canh, L. Averyanov, T. Maisak, AL3137.

Asclepiadaceae

Hoya thuhae Aver., Vuong & V.C.Nguyen

Dak Lak Province, Yok Don National Park, Dipterocarp forest at elevation of about 200 m a.s.l., living plant obtained from local collectors in 2018 by Nguyen Van Canh. Herbarium specimen and photos were made from plants cultivated in Buon Ma Thuot on 10 May 2024, Nguyen Van Canh, L. Averyanov, T. Maisak, AL3137.

Convallariaceae

Aspidistra sp.

Khanh Hoa Province, Dien Khanh District, evergreen broad-leaved forest with bamboo at elevation of about 100 m a.s.l., rare, obtained from local collectors in 2023.

10 May 2024, Nguyen Van Canh garden, AL3136.

Convallariaceae

Peliosanthes sp.

Khanh Hoa Province, Dien Khanh District, evergreen broad-leaved forest with bamboo at elevation of about 100 m a.s.l., rare, obtained from local collectors in 2023.

10 May 2024, Nguyen Van Canh garden, AL3135.

Orchidaceae

Thrixspermum sp.

Ninh Thuan Province, Nui Chua Mountain, Nui Chua National Park, obtained from local collectors in 2024.

10 May 2024, Nguyen Van Canh garden, AL3134.

Zingiberaceae

Alpinia vietnamica

Da Nang, Son Tra, evergreen broad-leaved forest at elevation of about 400 m a.s.l., collected in 2021.

10 May 2024, Nguyen Van Canh garden, AL3133.

Lowiaceae

Orchidanthe sp.

Dong Nai Province, Nam Cat Thien National Park, evergreen broad-leaved forest at elevation of about 200 m a.s.l., collected in 2019.

10 May 2024, Nguyen Van Canh garden, AL3132.

Cyperaceae

Carex sp.?

Khanh Hoa Province, Khan Le Pass, on open wet granite cliffs, common, collected in 2019.

10 May 2024, Nguyen Van Canh garden, AL3131.

Zingiberaceae

Curcuma sp.

Dak Lak Province, Dipterocarp forest at elevation of about 200 m a.s.l., obtained from local collectors, collected in 2019.

10 May 2024, Nguyen Van Canh, AL3130.

Convallariaceae

Aspidistra sp.

Da Nang, Ba Na National Park, evergreen broad-leaved forest at elevation of about 900 m a.s.l., obtained from local collectors, collected in 2021.

10 May 2024, Nguyen Van Canh, AL3129.

Orchidaceae

Oberonia sp.

Kon Tum Province, obtained from local collectors,

10 May 2024, Nguyen Van Canh, AL3128.

Orchidaceae

Grosourdya appendiculata

Kon Tum Province, obtained from local collectors,

10 May 2024, Nguyen Van Canh, AL3127.

Asclepiadaceae

Hoya burmanica Rolfe⁣

Son La Province, obtained from local collectors,

10 May 2024, Nguyen Van Canh, AL3126.

Asclepiadaceae

Hoya pandurata

Son La Province, obtained from local collectors,

10 May 2024, Nguyen Van Canh, AL3125.

Orchidaceae

Dendrobium aphyllum C.E.C.Fisch.

Dak Lak Province, M’Drak District, evergreen broad-leaved forest, lithophyte on large stream granite rocks at elevation of about 400 m a.s.l., common.

10 May 2024, Nguyen Van Canh, AL3124.

Convallariaceae

Peliosanthes micrantha?

Dak Lak Province, M’Drak District, Chu Mu Mountain, 700 m a.s.l., evergreen forest, terrestrial herb, not common.

March 2024, Nguyen Van Canh, AL3107a.

Asclepiadaceae

Hoya 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. Primary and old secondary broad-leaved evergreen humid forest on very steep rocky slopes on solid, marble-like highly eroded limestone at elevation 900–1200 m a.s.l. on steep rocky slope. Creeping epiphytic or lithophytic herbaceous vine 1.5–2 m long on rocky mountain top. Flowers white, corona reddish pink. Occasional.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3105 (photo only).

Nguyen Van Canh: I think it is Hoya fungii. Or maybe Hoya dasyantha.

Orchidaceae

Dendrobium aduncum Lindl.

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. Primary and old secondary broad-leaved evergreen humid forest on very steep rocky slopes on solid, marble-like highly eroded limestone at elevation 900–1200 m a.s.l. on steep rocky slope. Clustering epiphyte on mossy tree on rocky mountain top. Flowers light purple violet. Occasional.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3104 (photo only).

Cucurbitaceae

Thladiantha angustisepala W.J.de Wilde & Duyfjes?

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 600–650 m a.s.l. Creeping herb or herbaceous vine to 2 m long in open rocky place along small stream. Flowers bright yellow. Occasional.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3103 (photo only).

Hypericaceae

Hypericum japonicum Thunb.

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 600–650 m a.s.l. Erect to prostrate terrestrial herb tp 25 cm tall in open wet place among secondary shrubs on steep alluvial slope. Flowers yellow. Very common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3102 (photo only).

Verbenaceae

Clerodendrum 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 600–650 m a.s.l. Erect herb or undershrub to 2 m tall in open place among secondary shrubs on steep alluvial slope. Flowers white. Very common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3101 (photo only).

Acanthaceae

Asystasia 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 600–650 m a.s.l. Erect terrestrial herb to 1 m tall among shady rocks on steep slope of stream canyon. Flowers light violet. Common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3100 (photo only).

Arecaceae

Arenga pinnata (Wurmb) 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 600–650 m a.s.l. Large palm with stem to 3 m tall and leaves 5–6 m long on shady very steep rocky slope along stream canyon. Very common dominant of the forest.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3099 (photo only).

Araceae

Acorus gramineus Aiton

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 600–650 m a.s.l. Lithophytic herb on wet stream rocks in rather open place. Not common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3098.

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. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–650 m a.s.l. Treelet to 3 m tall in rather open place along trail. Flowers white. Common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3097.

Selaginellaceae

Selaginella 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 600–650 m a.s.l. Terrestrial herb to 0.5 m tall in rather open place on steep rocky slope. Very common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3096.

Polygonaceae

Polygonum chinense L.

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 600–650 m a.s.l. Terrestrial herb to 1 m tall in rather open wet place on steep rocky slope. Flowers white. Very common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3095.

Polypodiaceae s.l.

Microlepia 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 600–650 m a.s.l. Terrestrial fern with fronds to 1 m tall in rather open place on steep rocky slope. Common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3094.

Selaginellaceae

Selaginella 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 600–650 m a.s.l. Terrestrial herb to 0.5 m tall on very steep rocky stream slope. Locally very common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3093.

Zingiberaceae

Amomum sp. s.l.

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 600–650 m a.s.l. Terrestrial and lithophytic herb to 1.5 m tall on very steep rocky stream slope. Flowers white. Locally very common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3092.

Polypodiaceae s.l.

Microsorum sp. s.l.

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 600–650 m a.s.l. Lithophytic creeping fern with fronds to 1 m long on large stream boulders. Common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3091.

Polypodiaceae s.l. (Thelypteridaceae)

Thelypteris 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 600–650 m a.s.l. Terrestrial and lithophytic fern with fronds to 1.5 m long among shady rocks along stream. Very common.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3090.

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 600–650 m a.s.l. Terrestrial and lithophytic herb to 0.4 m tall among shady rocks along stream. Flowers white with pink apex of tepals. Not rare.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3089.

Begoniaceae

Begonia 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 600–650 m a.s.l. Erect terrestrial and lithophytic herb to 1 m tall among shady rocks along stream. Leaves below dull purple brown. Flowers white. Not rare.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3088.

Musaceae

Musa 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 600–650 m a.s.l. Giant herb to 15 m tall on steep wet alluvial slope along rocky stream. Floral bracts yellow inside, purple brown outside, flowers light yellow.

05 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3087.

Asclepiadaceae

Dischidia acutifolia Maingay ex Hook.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. Primary and old secondary broad-leaved evergreen humid forest on very steep rocky slopes on solid, marble-like highly eroded limestone at elevation 900–1200 m a.s.l. on steep rocky slope. Epiphytic or lithophytic herbaceous vine 1-2 m long in open places on rocky mossy mountain top. Flowers light yellowish to almost white. Not rare.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3083.

Orchidaceae

Eria boniana (Gagnep.) Tang & F.T.Wang

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. Primary and old secondary broad-leaved evergreen humid forest on very steep rocky slopes on solid, marble-like highly eroded limestone at elevation 900–1200 m a.s.l. on steep rocky slope. Creeping epiphyte and lithophyte in shady places on rocky mossy mountain top. Locally common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3082.

Clusiaceae

Garcinia fagraeoides?

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. Primary and old secondary broad-leaved evergreen humid forest on very steep rocky slopes on solid, marble-like highly eroded limestone at elevation 900–1200 m a.s.l. on steep rocky slope. Medium size tree on rocky mossy mountain top. Occasional.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3081.

Fagaceae

Quercus 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. Primary and old secondary broad-leaved evergreen humid forest on very steep rocky slopes on solid, marble-like highly eroded limestone at elevation 900–1200 m a.s.l. on steep rocky slope. Medium size tree on rocky mossy mountain top. Occasional.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3080.