Oncidium. 225 



Crista ut in praecedente, lamella mediana mani- 

 feste brevior 237. 0. oblongatum. 



*** Petala sepalis aequilata. 



Crista plurituberculata . 238. 0. Älfredi. 



t. Crista labelli velutina vel pubescens. Folia ensata. 



* Crista labelli tuberculis 7 composita 239. 0. ensatum. 



** Crista basi callis 2 magnis, et 3 minoribus ante- 



positis composita 2 40. 0. dichromaticum. 



rj. Crista labelli 3-cruris, cruribus breviter obtuse lobu- 



latis, basis lobi intermedii grosse acuteque dentata 2 41. 0. prionochilum. 



22 1. 0. Mandonii Reichb. f. Xen. Orchid. III. (1878) 21. — Pseudobulbi ovato- 

 conici, sicci profunde sulcati rugosique, diphylli, cataphyllis ipsos aequantibus, triangulis, 

 acutis et foliis 1 vel 2 infrabulbosis vaginantibus suffulti, ad 6 cm longi, basi 2,5 cm 

 lati. Folia e basi latiuscula oblonga vel lanceolata, acuta, pro planta brevia, coriacea, 

 energice carinata, ad 1 5 cm longa, ad 2 cm lata, inter se satis diversa. Inflorescentia 

 stricta, erecta, supra tantum florifera, paniculata, ad 70 cm longa, inclusa panicula 10 

 ad 1 5 cm longa, rami squarrosi, denique fractiflexi, bracteae lineares, 5 mm longae, 

 acuminatae, pedicelli cum ovariis 8 ad 1 mm longi. Sepalum dorsale obovato-oblongum, 

 concavum, apice rotundatum, lateralia in synsepalum biapiculatum, a medio bifidum 

 connata, utroque late ovato-oblongo, acuto, omnia 8 mm longa, 3 mm lata. Petala 

 elliptica, apice rotundata, aequilonga, 3,5 mm lata. Labelli lobi laterales parvi, rhombei, 

 semiretrorsi, deinde antice rotundati, in isthmum brevem angustati, lobus intermedius 

 late reniformis, antice profundiuscule sinuatus, crista 5- vel 7-lamellata, 3 lamellis 

 rhombeis altioribus antepositis, additis utrinque papulis minoribus, tota basis labelli 

 velutina, totum labellum 1 ad 1,2 cm longum, basi 8 mm, antice 1,2 cm latum. Gyno- 

 stemii alae breves, quadratae, crenulatae, rostellum productum. — Fig. 19L: a — d. 



Subäquatoriale andine Provinz. Bolivia, Umgegend des Vulkans Sorata in 

 der Provinz Larecaja in 2700 — 3000 m ü. M. (Mandon n. 115l!). 



22 2. 0. da8ytyle Reichb. f. in Gard. Chron. (187 3) 253 et 432; Bot. Mag. t. 6 494; 

 Belg. Hortic. (1881) 236; L'Orchidoph. (1885) 55; Journ. of Hortic. (1887)1. 496, fig. 58; 

 Veitch, Man. Orchid. PI. VIII. 33; Williams, Orch. Grow. Man. 7. ed. 608 c. ic. ; The 

 Gardenil. 17; Sander, Orch. Guide 178; Cogn. in Fl. Bras. III'. 6. 336. — Pseudobulbi 

 breviter ovoidei, leviter compressi, vetustiores irregulariter sulcati, ad 4 cm longi, ad 

 2 cm lati, 1 cm vel ultra crassi, diphylli. Folia basi breviter complicata, oblonga vel 

 oblongo-lanceolata, acuta, ad 1 5 cm longa, 2,5 cm lata. Scapus gracilis, ad 36 cm 

 longus, leviter fractiflexus, flores in racemum pauciflorum dispositi, bracteae minutissimae, 

 triangulae, pedicelli florum ad 2,5 cm longi. Sepala lanceolata vel oblongo-lanceolata, 

 acuta, dorsale incurvum, concavum, lateralia post labellum abscondita, circ. medium 

 usque connata, dorsale 1,5 cm longum, ad 4 mm latum, lateralia 1,6 cm longa, 5 mm 

 lata. Petala sepalo dorsali subaequalia, ovali-oblonga, obtusiora, omnia aequimagna, 

 pallide flava vel sulphurea, maculis fusco-purpureis notata. Labelli lobi laterales parvi, 

 trianguli, vix ab intermedio segregati, lobus intermedius basi retusus vel humeratus 

 vel cordatus, antice reniformis vel ultra semiorbicularis, margine undulatus, antice pro- 

 funde bilobus, discus basi callis 2 parallelis, valde incrassatis praeditus, additis 2 minoribus, 

 totum labellum ad 2 cm longum et fere latum, pallide sulphureum, calli atropurpurei. 

 Gynostemium incurvum, breve, crassum, dense puberulum, alae irregulariter subquadratae, 

 anthera valde convexa, minute puberula, antice modice producta. 



Südbrasilianische Provinz. Rio de Janeiro, Orgelgebirge (eingeführt von 

 Williams). — Ex. cult.! 



223. 0. uliginosum Barb. Rodr. Gen. et Sp. Orch. nov. I. (1877) 92; Cogn. in Fl. 

 Bras. III. 6. 332, t. 71. — Pseudobulbi pro planta parvi, subglobosi vel brevi-ovoidei, 

 2,5 ad 3 cm longi, 2,5 cm lati, di- ad triphylli, sicci irregulariter rugosi. Folia linearia, 

 basi sensim angustata, acuminata, ad 35 cm longa, 1 ad 1 ,3 cm lata, stricta. Inflores- 



A. Engler, Das Pflanzenreich. IV. (Embryophyta siphonogama.) 50. 4 5 



