venustum Barb.Rodr. = Beadlea venusta (Barb.Rodr.) Garay 
viride Cogn. = Pelexia viridis (Cogn.) Schltr. 
vulnerarium Rojas = incerta sedis 
Weirii (Rchb.f.) Cogn. = Pelexia laxa (Poepp. & Endl.) Lindl. 
Stigmatosema Garay, gen. nov. 
Etymology: Stigma = mark and sema = sign, in reference to 
the large, flared rostellum. 
Sepala subsimilia, subparallela, libera; sepalo postico con- 
cavo, sepalis lateralibus minore angusteque; sepalis lateralibus 
obliquis, mentum non formantibus. Petala sepalo postico 
agglutinata, apice libera, basi truncata. Labellum sessile, tenue, 
conduplicato-excavatum, basin versus obscure bicallosum, apice 
recurvum. Columna brevis, cylindrica, facie puberula, basi obli- 
qua; stigmata 2, distincta; rostellum subquadrato-flabellatum, 
truncatum, in medio sulcatum, tenue. Anthera ovata, concava, 
obtusa; pollinia clavata, viscidio ovato, satis magno. Ovarium 
oblique fusiforme, sessile, paululo tortum. 
Plantae terrestres, graciles; radicibus fasciculatis, tuberosis, 
stipitato-fusiformibus; foliis basilaribus, petiolatis; scapo gracill, 
suberecto, plurivaginato, apice laxe paucifloro; floribus parvu- 
lis, spicatis. 
Sepals subsimilar, subparallel, free; dorsal sepal concave, 
smaller and narrower than the lateral sepals; lateral sepals 
oblique without forming a mentum. Petals agglutinate with dor- 
sal sepal, free at apex and truncate at base. Lip sessile, thin, 
conduplicate-excavate, obscurely bicallose near base, the apex 
recurved. Column short, cylindric, with a puberulent front, 
oblique at base, not truly forming a distinct foot on top of ovary: 
stigmata 2, distinctly separate; rostellum subquadrate-flabellate, 
truncate, sulcate in middle, thin, pliable. Anther ovate, concave, 
obtuse; pollinia clavate with a rather large viscidium. Ovary 
obliquely fusiform, sessile, somewhat twisted. 
Terrestrial, slender plants. Roots fasciculate, tuberous, stipi- 
tate-fusiform. Leaves basal, petiolate. Scape slender, suberect, 
several-sheathed, terminated by a loosely few-flowered spike. 
Flowers small. 
TYPE: Brachystele Hatschbachii Pabst. 
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