Peristylus constrictus (Lindl.) Lindl. 1835

Plant and Flowers in situ Chang Mai Thailand

Photos by David Kuehn in situ Chang Mai Thailand

Another Flower?

Plant in situ Laos ?

Photos by Charles Marden Fitch in situ Laos

Fragrance Full shade Warm Cool LATESpring EARLYSummer

Common Name The Constricted Peristylus - In China Da Hua Kuo Rui Lan - In Thailand Nang tai tua phu, Wan khao phae, Ueang nang tai

Flower Size .6" [1.5 cm]

Found in the western Himalayas, Chinese Himalayas, Assam, Bangladesh, eastern Himalayas, India, Nepal, Myanmar, Thailand, Cambodia, Vietnam and the Philippines on shrubby slopes at elevations of 450 to 1200 [1500 to 2800 China] meters as a medium to large sized, warm to cool [cool to cold - China] growing terrestrial with a cylindrical, pubescent tuber giving rise to an erect, stem that is bracteate above and carrying on the lower half ovate-elliptic to ovate-lanceolate, acute, shortly petiolate and channeled, reticulate leaves that blooms in the late spring and early summer on a terminal, cylindric, glabrous, 3.6 to 14" [9 to 35 cm] long, subdensely many flowered inflorescence with erect, lanceolate, acuminate floral bracts and carrying sweetly scented flowers.

CAUTION The Photos by Charles Marden Fitch were IDed by Eric Christenson and published in the AOS Bulletin Vol 66 #3 1997. Found in Laos at elevations around 240 to 300 meters as a small sized terrestrial. All references to this orchid put the size as more than 11.8" [29 cm] tall so please use with caution!!!

The photos by David Kuehn appear to be much closer to what the references describe.

Synonyms Habenaria constricta (Lindl.) Hook.f. 1890; Habenaria cylindrocalyx Gagnep. 1931; *Herminium constrictum Lindl 1832; Orchis leucantha Ham. ex Hook.f. 1890; Platanthera constricta Lindl. ex Wall. 1832

References W3 Tropicos, Kew Monocot list , IPNI ; Otia Botanica Hamburgensia Rchb.f 1878; The Orchids of Sikkim-Himalaya Part 1 King & Pantling 1898 as Habenaria constricta drawing fide; The Orchids of North-Western Himalaya Vol IX Part II Duthie 1906 as Habenaria constricta; Flore Generale de Indo-Chine Volume 6 Gagnepain 1934 as Habenaria cylindrocalyx; Flore Generale de Indo-Chine Volume 6 Gagnepain 1934 as Habenaria constricta; The Orchids of Thailand Seidenfaden & Smitinand 1959 as P goodyerioides drawing fide; Contributions to a Revision of the Orchid Flora of Cambodia, Laos and Vietnam Seidenfaden 1975 as Habenaria constrictus; Contributions to a Revision of the Orchid Flora of Cambodia, Laos and Vietnam Seidenfaden 1975 as Habenaria cylindrocalyx; Indian Orchids: Guide to Identification and Culture Pradhan 1976 drawing fide; Dansk Botanisk Arkiv Bind 31 #3 Orchid Genera in Thailand V Orchidoideae Seidenfaden 1977 drawing fide; Orchids of Kumaun Himalayas Pangtey, Samant and Rawat 1991; Identification of the Orchids [Orchidaceae Juss.] Vietnam Averyanov 1994; AOS Bulletin Vol 66 #2 1997 photo fide; The Wild Orchids Of Thailand Vaddhanaphuti 2001 photo; Orchids of Bhutan Pearce & Cribb 2002; Orchid Flora of Kamrup District, Assam Iswar Chandra Barua 2001 drawing fide; Orchids of India A Glimpse Misra 2007; Native Orchids From Gaoligongshan Mountains, China Xiaohua, Xiaodong and Xiaochun 2009; Flora of China Vol 25 Zhengyi, Raven & Deyuan 2009; Flora of China Vol 25 Illustrations Zhengyi, Raven & Deyuan 2010 drawing hmm; The Wild Orchids in Yunnan Xu Xiang Ye & Liu 2010 photos hmm; Flora Of Thailand Orchidaceae Vol 12 Part 1 Pedersen, Kurzweil, Suddee & Cribb 2011 drawing/photo fide; Orchids of Odisha Misra 2014 drawing fide; LANKESTERIANA 15(1): 750. Jeewan Singh Jalal & J. Jayanthi 2015 photo fide; Lankesteriana Vol 18 [1]: 2362 Jalal & Jayanth 2018; Orchids of Maharashtra Jalal 2018; Atlas of Native Orchids of China Vol 1 Jin Xiaohua, Li Jianwu and Ye Deping 2019 photo fide;