428 A. Cosnıaux: 
gerrimis, uninervulosis, 11/, mm. longis, dorsali ®/, mm. lato, lateralibus 
usque ad basin liberis, 1 mm. latis; petalis oblongis, acutiusculis, inte- 
gerrimis, obscure uninervulosis, 1!/, mm. longis, dorsali 1/, mm. lato; 
labello breviter unguiculato, anguste ovato-triangulari, acuto, inte- 
gerrimo, ad medium obscure constricto, inferne trinervuloso, 1!/, mm. 
longo, ?/, mm. lato; columna crassa, !/, mm. longa, clinandrio obscure 
denticulato. 
Pleurothallis polygonoides Griseb.! Flor. (1864) p. 609. 
Flores pallidi, segmentis apice purpurascentibus, labello purpureo. 
Hab. in Trinidad supra arbores prope Arima: Crueger, Bradford. 
167. Pleurothallis rhomboglossa Rchb.f. perpusilla, glaberrima; 
rhizomate gracillimo, ramoso, breviter radicante; caulibus subfiliformi- 
bus, vaginis tubulosis hyalinis laxis occultatis, I—3 mm. longis; folio 
submembranaceo, oblongo-subspathulato, apice obtuso vel rotundato et 
minute apiculato, basi cuneato fere in petiolum angustato, 5—10 mm. 
longo, 2!/,—4 mm. lato; pedunculo solitario, capillariı, 1—2-floro, 
4—7 mm. longo; bracteis acutis, 2/; mm. longis; floribus nutantibus, 
segmentis tenuiter membranaceis; sepalis ovatis, acutis, 1'/, mm. longis, 
1 mm. latis, lateralibus liberis; petalis ovato-oblongis, acutis, 1?/, mm. 
longis; labello sessili, ovato-rhombeo, acuto, concavo, petalis paulo 
breviore; columna brevissima. 
 Pleurothallis rhomboglossa Rehb.f.! in Flora (1865) p. 276; Griseb. 
Cat. p. 259; Sauv. Fl. Oub. p. 226. 
Pleurothallis vaginulata Griseb.! Cat. (1866) p. 259. 
Hab. in Cuba orientali supra arbores prope Monteverde: Wright 
n. 1506. 
Sect. V. Lepanthiformes Cogn. in Mart. Fl. Bras. II. 4 (1896) p. 579. — 
Spec. 168— 176. 
168. Pleurothallis villosa Kn. et Weste. parva, caespitosa; cauli- 
bus gracilibus, 4—6-articulatis, 5—6 em. longis; vaginis brevissime 
hirtellis, apice abrupte dilatatis, margine incrassatis ciliatisque; folio 
ceoriaceo, oblongo-lanceolato, obtuso, basi satis angustato et in petiolum 
3—6 mm. longum producto, 4—5t/, cm. longo, 10—15 mm. lato; 
pedunculis communibus saepius fasciculatis, capillaribus, glabris, 
SUDEInR uni—paueifloris, folio dimidio brevioribus; bracteis minutis; 
floribus minutis, patulis, brevissime pedicellatis; sepalis membranaceis, 
subaequilongis, linearibus, obtusis, extus puberulis, margine eiliatis, 
dorso carinatis, lateralibus fere usque ad apicem connatis, basi antice 
gibbosis; petalis nanis, lineari-spathulatis, obtusis, eiliatis; labello 
obovato-oblongo, obtuso, eiliato, disco sulcato. 
