Oncidium. 227 



breviusculae, ad 5 mm longae, pedicelli cum ovariis 1,5 cm longi. Sepalum dorsale e 

 basi brevi-cuneata oblongum, lateralia basi tantiim connata, ceterum libera, lanceolata, 

 subdimidiata, acuta, apicibus reflexis, sepalum dorsale 6,5 mm longum, 2,5 mm latum, 

 lateralia 7 ad 8 mm longa, vix 2 mm lata. Petala late oblonga, obtusa, margine 

 constricta undulataque, sepalo dorsali aequilonga, ad 5 mm lata. Labelli lobi laterales 

 ligulati, divergentes vel reflexi, margine crenulati, obtusi, lobus intermedius multo major, 

 unguiculatus, transverse oblongus, antice profunde emnrginatus, medio dente triangulo 

 praeditus, basi subcordatus, margine crenulatus, crista in ungue labelli conspicua, ambitu 

 rectangula vel oblonga, in tubercula 6 divisa anteposito callo pentadactylo vel polydactylo, 

 additis tuberculis utrinque 2 vel 3, totum labellum circ. 1,2 cm longum, lobi laterales 

 3 mm longi, 1,5 mm lati, lobus intermedius cum ungue 10 mm longus, lamina 6 ad 

 7 mm longa, 1,2 cm lata. Gynostemii parvi alae obtuse quadrangulae, margine crenulatae, 

 tabula crassa. Flores certe flavi. — Fl. a Novembri ad Martium. 



Südbrasilianische Provinz. Staat Bahia (Blanchet n. 3343!); Felsen bei 

 Canna brava bei Maracas (Ule n. 7013!): Minas Geraes, ohne genaueren Standort 

 (Glaziou ohne n.!, Widgren ohne n. et n. 772!); bei Itacolumi (Sellow n. 701 e. p.!); 

 Paranä, Serrinha (Düsen n. 7055!, 7057!, 7188!, 7189!). 



Nota. Icon in Fl. Brasiliensi supra cit. quoad cristam haud omnino accurata etiam de- 

 scriptio organi illius nimium brevis. 



226. 0. pirarense Reichb. f. in Linnaea XXII. (1849) 8 46; Lindl. Fol. Orch. Oncid. 46; 

 Reichb. f. in Walp. Ann. VI. (1861) 797 et III. 557 (= Linnaea 1. c); Cogn. in Fl. Bras. 

 III. 6. 402. — Radices pro planta haud magna copiosae, crassiusculae. Pseudobulbi 

 cataphyllis quibusdam parvis triangulis suffulti, breves, 2 ad 2,5 cm longi, basi 1 cm 

 lati, monophylli. Folia oblongo-lanceolata, acuta, erecta, carinata, coriacea, rigida, 

 utplurimum 6 cm longa, 1 cm lata, sicca minutissime crispula. Inflorescentia 45 ad 

 50 cm longa, scapus strictus, satis firmus, vaginulis brevibus, valde distantibus obsitus. 

 Flores in racemum sub anthesi valde elongatum, in nostro specimine 23 cm longum 

 dispositi, pedicelli tenues, 1,5 cm longi, rhachis superne leviter fractiflexa, bracteae 

 minutae triangulae, reflexae. Sepalum dorsale, obovatum, brevi-tenuique unguiculatum, 

 lateralia basi connata, lanceolata, acuta, circ. 1 ad 1 , 1 cm longa, dorsale 6 mm, lateralia 

 paulo longiora 4 mm lata. Petala anguste ovata, acuta, leviter undulata, sepalo dorsali 

 aequilonga, 4 mm lata. Labelli brevi-unguiculati lobi laterales parvi, auriculiformes, 

 retrorsi, apice rotundati, lobus intermedius isthmo parvo cum basi cohaerens, in laminam 

 latissime reniformem dilatatus, antice leviter emarginatus breviterque apiculatus, crista 

 labelli in ipsa basi crassa, tricruris, crure mediano magis prominente quam lateralia, 

 totum labellum margine undulatum, ad 2 cm longum, basi inter lobos laterales 1,5 ad 

 1,8 cm latum, (lobi laterales 6 mm longi, 4 mm lati) antice (lobus intermedius) 2,5 cm 

 latum. Gynostemii alae amplae, dolabriformes, rostellum breve, androclinium postice 

 dente magno triangulo auctum. — Fl. Junio. — Fig. 19 TT: a — b. 



Britisch-Guiana, bei Pirara (Rieh. Schomburgk n. 635!). 



227. 0. fuscans Reichb. f. Otia bot. Hamburg. II. (1881) 86; Cogn. in Fl. Bras. 

 III. 6. 361, t. 79, fig. 1. — Pseudobulbi pro rata parvi, ovato-oblongi, leviter com- 

 pressi, 3 ad 3,5 cm longi, 1,5 cm lati, rugosi, non costati, diphylli, rarius triphylli, 

 cataphyllis triangulis obtusis suffulti. Folia basi complicata, oblonga vel oblongo-lanceolata, 

 acuta, pergamenea, carinata, ad 12 cm longa, 1,2 ad 1,8 cm lata. Scapus satis firmus, 

 strictus, validus, vaginulis brevissimis passim obsitus, plerumque circ. 50 cm altus, in- 

 florescentia paniculata, leviter contraeta, pluri- ad multiflora, interdum altior, bracteae 

 minutae circ. 5 mm longae, triangulae, acutae, pedicellis circ. 12 ad 1 6 cm longis 

 arete adpressae. Sepalum dorsale obovato-oblongum, apice obtusum, 8 mm longum, 

 3V2 mm latum, lateralia basi ipsa connata, oblongo-lanceolata, acuta, 10 mm longa, 

 3 ad 4 mm lata. Petala sepalo dorsali similia, fere duplo latiora, brevi-unguiculata, 

 9 mm longa, 6 mm lata. Labelli lobi laterales trianguli, obtusi, divergentes, a lobo 

 intermedio sinu amplo sejuneti, lobus intermedius breviter unguiculatus, toto ambitu 

 orbicularis vel subreniformis, antice profunde angusteque sinuatus, totum labellum 2 cm 



15* 



