ORCHIDACE^ 



specimen. Scape conspicuously surpassing the leaf, about 30 cm. 

 high, 2-2.5 mm. thick below, suberect from a decumbent base, 

 provided with several tubular sheaths which are approximate or 

 imbricating below and very remote above. Raceme very dense, 

 about 1.9-4.2 cm. long, 1 cm. wide when floriferous. Bracts of the 

 inflorescence about 2.6 mm. long, 3.4 mm. wide, very broadly tri- 

 angular, narrowed to an abruptly acute apex, concave with finely 

 uneven margins, deflexed in development. Flowers minute, peri- 

 anth tubular-connivent, segments connate below. Lateral sepals 

 about 3-3.5 mm. long, 1.3 mm. wide, oblong, obtuse, concave, 

 very thick and fleshy, carinate especially at the apex, triquetrous 

 in transverse section, one-nerved. Dorsal sepal membranaceous, 

 about 2.6 mm. long, 1.15 mm. broad, oblong, obtuse, fleshy- 

 thickened and concave-conic at the apex, one-nerved. Petals 

 about 2.2 mm. long, .8 mm. broad above, spatulate, broadly 

 rounded at the apex, slightly thickened above, one-nerved. Lip 

 about 2.7 mm. long, 1.4 mm. wide near the base, very fleshy par- 

 ticularly above, oblong-deltoid, rounded at the apex, with the lat- 

 eral margins involute forming a tube, when spread out as far as 

 possible without rupture deltoid, three-nerved. Column minute, 

 provided with an erect, lanceolate, sharply bidentate rostellar 

 process. Anther about 1.5 mm. long, narrowly triangular-lanceo- 

 late, long acuminate, with eight small pollinia. 



This species is closely allied to Thelasis Cebolleta J. J. Sm.,but 

 it is consistently larger throughout. 



KiAU, Clemens 88, November 1915. 3000 feet altitude. Flowers cream 

 color. 



2. Thelasis variabilis A. S^ S. sp. nov. Herba gracilis. Pseu- 

 dobulbi biarticulati, vagina folio terminanti arete obtecti, mono- 

 phylli. Folium elliptico-oblongum, acutum, ad basim condupli- 

 catam angustatum, chartaceum. Scapi folium multo excedentes, 



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