Pennilabium labanyaeanum C.Deori, Odyuo & A.A.Mao 2015

TYPE Photo by © C. Deori & N. Odyuo and * Gard. Bull. Singapore 67(1): 143 C.Deori, Odyuo & A.A.Mao 2015

Common Name or Meaning Labanya's Pennilabium [Indian Mother of the first author, Mr Deori current]

Flower Size .32 to .4" [.8 to 1 cm]

Found in India on moss-covered branches of trees in steep subtropical hill forest along streams at elevations around 1753 meters as a mini-miniature sized, cool growing epiphyte with a very short, compressed stem carrying very close set, distichous, elliptic to broadly lanceolate, more or less fleshy, often basally twisted, leathery, green, unequally bilobed apically, subacute to obtuse, narrowing below into the base leaves that blooms in the summer on a lateral, unbranched, erect to parallel to the leaves, peduncle .8 to 1.4" [2 to 3.5 cm] long, slender, cylindrical, rachis .2 to .4" [.5 to 1 cm] long, complanate-cylindrical, ridged, 1 to 2.4" [2.5 to 6 cm] long, overall, successsively 1 to 3 flowered inflorescence with persistent, ovate-triangular, obtuse, lemon green floral bracts.

Similar to P naja but this one has the flower only half open, the sepals and petals are pure white, the sepals are obtuse, dorsally keeled and 5 veined and the lip base forms a hollow channel with minute hairs, epichile of the lip is unlobed with erose margins, there is no prominent raised callus but there is an area of powdery yellow that widens towards the apex and the short spur make this orchid unique.

KEY TO PHOTO B–B2. Pennilabium labanyaeanum in the wild. C–C2. Habit. D. Inflorescence. E. Floral bract. F. Peduncle sheath. G & G1. Flower, front & side views. H. Fruit. I. Dorsal sepal, dorsal view. J. Lateral sepal, dorsal view. K. Flower bud, side view. L. Lip, front view. L1. Lip, front view (highlighting the narrow hollow channel with minute hairs at the base). M. Floral perigon with spurred lip. N. Spurred lip(side view) with column, pedicel and ovary. O. Column, close view. O1. Column with pedicel & ovary. P & P1. Anther, front views. Q. Longitudinal section of spur. R. Pollinia with stipe. S. Stipe. Pennilabium naja P.O’Byrne (images taken from the spirit sample of the holotype O’Byrne SUL107 at SING) T. Flower, side view. U. Floral perigon with spurred lip. V. Lip, front view. W. Anther, front view. X. Pollinia with stipe. (Photos: C. Deori & N. Odyuo)

Synonyms

References W3 Tropicos, Kew Monocot list , IPNI ; * Gard. Bull. Singapore 67(1): 143 C.Deori, Odyuo & A.A.Mao 2015 drawing/photo fide

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