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New taxa of Peliosanthes and Tupistra (Asparagaceae) in the flora of Laos and Vietnam and supplemental data for T. patula

Last modified on 26/7/2017 at 10:15:00 AM. Total 10629 views.

This article was published on Phytotax Vol 312(2) by the authors as Nguyen Sinh Khang (EIBR - VAST, Vietnam), Leonid Averyanov (Komarov Botanical Institute, Russian Academy of Science, Russia), Noryiuki Tanaka (Otsuka, Japan), Eugene Konstantinov (Kaluga State University, Russia), Tatiana V. Maisak (EIBR - VAST, Vietnam) and Nguyen Tien Hiep (Center for Plant Conservation, Vietnam) on July 2017.

Three new taxa, Tupistra gracilis, Peliosanthes griffithii var. breviracemosa and P. hirsuta, are described and illustrated. The first two taxa are local endemics of northern Vietnam and the last species is endemic to karstic limestone areas of central Laos. Tupistra fungilliformis and P. yunnanensis are recorded for the first time for Vietnam. A recently described species T. patula from northern Vietnam is supplemented with new data on its morphology, ecology and distribution.

New taxa:

Peliosanthes hirsuta Averyanov & N.Tanaka, sp. nov.

Local endemic to central Laos. It distributes in the primary  and  secondary  broad-leaved  evergreen  forests  on  rocky,  highly  eroded, crystalline limestone at elevation 700–1000 m a.s.l. the species is terrestrial or lithophytic herb on shady rocky slopes. Flowering in November–December.

Peliosanthes griffithii Baker var. breviracemosa Averyanov & N.Tanaka, var. nov.

Endemic to northern Vietnam, found in Cao Bang province, Nguyen Binh district.

This is terrestrial  and lithophytic  herb  on  shady  slopes  covered  with  primary  coniferous forest with Pseudotsuga sinensis on highly eroded rocky limestone near ridge top at elevation about 1300 m a.s.l. Not common. Flowering October–November.

Peliosanthes griffithii var. breviracemosa on Phytotaxa312(2).jpg at www.BotanyVN.com

Peliosanthes  yunnanensis  F.-T.Wang  & Tang  in  Chang 

New record for Vietnam's flora, found in Lao Cai province, Sapa town Area.

It is terrestrial herb on shady slopes covered with primary broad-leaved evergreen forests on  sandstone,  granite  and  quartzite  at  elevation  1500–2200  m  a.s.l.; locally  very  common.  Flowering  October–December.

Peliosanthes yunnanensis on Phytotaxa312(2).jpg at www.BotanyVN.com

Tupistra fungilliformis F.T.Wang & S.Yun Liang in Liang

New record for Vietnam's flora, found in Cao  Bang  (Bao  Lac  district),  Ha  Giang  (Bac  Me,  Meo Vac  and Quan  Ba  districts),  Lao  Cai  (Bat  xat  district),  Son  La  (Thuan  Chau  district)  and  Thanh  Hoa  (Yen  Dinh  district).

It distributes in the primary and old secondary broad-leaved and coniferous humid forests (with Fokienia, Nageia,  Pinus,  Podocarpus,  Pseudotsuga,  Tsuga  and  Xanthocyparis)  preferably  on  highly  eroded  rocky  limestone, rarely on shale and sandstone, at elevations (100)1000–1800(2000) m a.s.l. It is large epiphytes or clustering lithophytes, rarely terrestrial herbs, common on moist rocky steep slopes, often on exposed mossy rocks near mountain tops or
along streams in ravines. Rare. Flowering October–February.

Tupistra gracilis on Phytotaxa312(2).jpg at www.BotanyVN.com

Tupistra gracilis Averyanov & N. Tanaka, sp. nov.

New species, Local  endemic  of  northern Vietnam, found in Thuong Xuan district, Thanh Hoa province.

It distributes in the primary  and  secondary  broad-leaved  evergreen  forests  on  rocky,  highly  eroded, crystalline limestone at elevations 800–1000 m a.s.l. Terrestrial and lithophytic herb on shady rocky steep limestone slopes. Plant sometimes grows on ground of rocky slopes covered by rather open forests and in large pockets filled with soil, namely not truly epilithic. Flowering in November–December.

Supplemental data for Tupistra patula Aver., N. Tanaka & K. S. Nguyen.

The species was published on Nordic Journal of Botany, 34(1): 23-37, in this article, the species was provided supplemental data.

Local endemic to northern Vietnam, found in Ha Giang province, Bac Me & Quan Ba districts.

It distributes in the primary and secondary evergreen broad-leaved, mixed and coniferous forests (with Xanthocyparis vietnamensis, Nageia fleuryi, Pseudotsuga sinensis, Calocedrus rupestris) on rocky solid highly eroded karstic limestone at elevations 1100–1300 m a.s.l. Lithophytic herb on mossy rocks on rocky steep slopes, often in shady and humid places. Flowering in October–December.

The articles would be found in https://biotaxa.org/Phytotaxa/issue/view/phytotaxa.312.2

(Phytotaxa 312(2))

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