Habenaria humistrata Rolfe ex Downie 1925 SECTION Diphyllae Kraenzl Photo by David Kuehn


Common Name The Humus Strata Habenaria - In Thailand Tup muo mot lin

Flower Size .32 to .6" [.8 to 1.5 cm]

Found in Thailand in humus or sandy soils in deciduous forests, hill evergreen forests and pine forests at elevations of 190 to 1200 meters as a small sized, hot to cool growing terrestrial orchid with an erect stem carrying 1 to 3, basal, adpressed to the ground, ovate to orbicular, mucronate leaves grading above into 1 to 5, erect, lanceolate, acuminate sterile bracts that blooms in the late spring through early fall on an erect, 4 to 12" [10 to 30 cm] long, glabbrous, lax, rather slender 1 to 10 flowered inflorescence with a .4 to 6" [1 to 15 cm] long rachis and lanceolate to ovate, acuminate floral bracts

This species, H reniformis, H porphyricola, H humidicola, H siamensis and H poilanei form a group of similar and possibly conspecific species and need more study to see if they can mainain their separate species status.

CAUTION!!!! Said by many sources [Kew included] to be synomonous with H diphylla but I cannot see the relationship with the examples that I have at present so I have left them separate.


References W3 Tropicos, Kew Monocot list , IPNI ; Flore Generale de Indo-Chine Volume 6 Gagnepain 1934; The Orchids of Thailand Seidenfadden and Smitinand 1959 ; The Orchids of Thailand Seidenfadden and Smitinand 1959 as H siamensis auct non Schltr fig 21 good; Tidsskrift bd 68 hft 1 Contributions to the Orchid Flora of Thailand V Seidedenfaden 1973 drawing good; Contributions to a Revision of the Orchid Flora of Cambodia, Laos and Vietnam Seidenfaden 1975; Dansk Botanisk Arkiv Bind 31 #3 Orchid Genera in Thailand V Orchidoideae Seidenfaden 1977 drawing fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo fide; Flora Of Thailand Orchidaceae Vol 12 Part 1 Pedersen, Kurzweil, Suddee & Cribb 2011 drawing/photo fide