Epidendrum unicallosum Hágsater & E.Santiago 2006 GROUP Oerstedella SUBGROUP Aberrans

LCDP Photo by © Karremans and The Reasearchgate Website

TYPE Drawing

TYPE Drawing by © Jimenez, Hágsater & E.Santiago and The AMO Herbario Website

Common Name The Single Callus Epidendrum [refers to the lip]

Flower Size .32" [8 mm]

Found in western Panama in wet montane forests without locational data as a small to medium sized, caespitose orchid with simple, canelike, terete stems that keiki often and carrying to 12 or more, all along the apical half of the stem, lanceolate, acute, apical margin erose-dentate leaves that blooms in the winter on a terminal, without a spathe, 1.6" [4 cm] long, peduncle to .8" [2 cm] long, thin, terete, naked, racemose, rachis terete, thin erect, smooth, simultaneously 6 flowered inflorescence with much shorter than the ovary, acute, triangular floral bracts and carrying resupinate, pink-lilac flowers.

"Epidendrum unicallosum belongs to the GROUP Oerstedella which is characterized by the sympodial habit, mostly verrucose stems, and the rostellum which is transverse to the column instead of parallel, forming a wide, open sinus and the SUBGROUP Aberrans which has small membranaceous flowers with a prominent clinandrium-hood, with unequal pollinia, the inner pair much smaller than the outer pair, and the pollinia very flat and translucent. The species is recognized by the three-lobed lip with the prominent clinandrium-hood which is longer than the body of the column proper, the entire, sulcate callus and the fleshy thickened mid-lobe of the lip with the small triangular appendages near the apex. It is similar to Epidendrum atypicum Hágsater & E.Santiago but in that species the lateral lobes of the lip are cuneate, truncate, with the margin sinuate and inserted at a 90° angle with respect to the axis of the lip. Epidendrum aberrans Schltr. has smaller flowers, the sepals .28 to .4" [7 to 10 mm] long, a membranaceous, bilobed midlobe, the calli 2, parallel, and the inner pair of pollinia located at about the middle of the outer pair." Hagsater etal 2006


References W3 Tropicos, Kew Monocot list , IPNI ; Icones Orchidacearum 8 Plate 822 Hagsater and Sanchez 2006 see recognition section; * Icones Orchidacearum 8 Plate 895 Hagsater & Santiago 2006 drawing fide;