Habenaria ayangannensis Renz 1992
Photos by © Joćo A. N. Batista; Joćo Batista F. da Silva; Luciano de Bem Bianchetti and the Orquideas de Minas Gerais; El Genero Habenaria
Drawing by © Joćo A. N. Batista; Joćo Batista F. da Silva; Luciano de Bem Bianchetti and the The genus Habenaria (Orchidaceae) in the Brazilian Amazon
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EARLY 
Common Name The Ayanganna Plateau Habenaria [A plateau in Guyana]
Flower Size .4" [1 cm]
Found in Meta and Vichada departments of Colombia,Venezuela, Guyana and west central Brazil in savannahs at elevations of 200 to 740 meters as a small sized, hot to warm growing terrestrial with an erect to slightly flexuous, remotely leafy throughout stem carrying 4 to 7, very narrowly linear-setaceous, acuminate, rather short, basally clasping leaves that blooms in the late spring, summer and early fall on a 3.6 to 4.8" [9 to 12 cm] long, laxly 3 to 12 flowered inflorescence with ovate, acute, shorter than the ovary floral bracts and carrying very small, greenish flowers.
Very similar in habit to H leprieurii as both have very delicate, somewhat flexuous stems with narrow-grasslike leaves and a rather short, laxly few flwoered inflorescence but H ayangannensis has shorter bracts versus extended into long bristle-like projections in H leprieurii. Also differs in the lobes of the petals are subequal in length with the anterior lobe longer than the posterior lobe versus distinctly uneven in length and the distincly shorter spur.
+"There is no known material of this species from northern Brazil, however it occurs in Venezuela, where it was collected a few meters from the Brazilian border and reaches the central region of the "cerrado" biome, where it is common in some localities. Thus, it is likely that the species occurs and will eventually be found in northern Brazil, at least in the state of Roraima. Distinctive features of this species are the linear-setaceous leaves, the small flowers (dorsal sepal ca. 3 x 2.5 mm), the ovary which spreads from the rachis and the bracts usually shorter than half the length of the pedicellate ovary, even in the lower flowers in the inflorescence. Flowers are mainly green and the species is typical of humid places. Flowering time in central Brazil as well as in Venezuela occurs at the end of the rainy season."
Synonyms
References W3 Tropicos, Kew Monocot list , IPNI ;
Fl. Bras. 3(4): 79 Cogniaux 1893 as H setacea var depauperata;
*Candollea 47: 490 Renz 1992
Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003;
O gźnero Habenaria (Orchidaceae) na Serra da Canastra, Minas Gerais, Brasil Rodriguésia 64 (2) Jun 2013 Materials to the Orchid Flora of Colombia Vol 1: 175 Szlachetko & Kolanowska 2017 drawing/photo fide
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