Oncidium. 



H» 



A. Sepala lateralia libera vel ipsissima tantum basi connahi. 



a. Lubelli lobi laterales parvi, auriculati, erecti. 



<(. Labellum album, basi rubro-punctulatum, flores maxiiui 



sectionis ß ad 7 cm diametro 1.0. Jotttikmum, 



ß. Labellum luteum, excepta basi plerumquc rubro- 

 signata, flores 1,8 ad 2 cm diametro. 

 I. Crista labelli tripartita, crista mediana pleramque 

 nasiformis. 



1. Cristae laterales minores, gynostemii alae de- 



flexae, bilobae 2. 0. ceboüeta. 



2. Ut praecedens, flores attamen 1 cm diam. vix 

 superantes, crista in lamellulam nasiformcm 

 reducta, additis tuberculis paucis; gynostemii 



alae breves vel subnullae 3. 0. nudutn. 



3. Gynostemii alae subquadratae ; sepala petala, 



labelli lobi inter se aequalia, spathulata ... 4. 0. Glamomi. 

 II. Crista labelli 7-partita, laterali quaque humiliore. 

 Lobi labelli laterales ligulati, rotundati; gynostemii 

 alae falcatae, incurvae ff, 0. aasmdm 



b. Labelli lobi laterales magni, divergentes. 



a. Lobi laterales obovati, rotundati, crista tricruris, crun 



mediano longiore, gynostemii alae parvae, rotundatae . <;. 0* Sprucei. 

 ß, Labelli ambitus ut in praecedente, gynost. alae magnae, 



rotundatae. Planta magna 1.0. Ott&l 



y. Lobi laterales maximi, oblique ovati, acuti, brevi- 



unguiculati, crista ut in praecedente, alae gynost. 



sublunatae 8. 0. longifolw/m, 



(). Lobi laterales falcati, angusti; crista gynostemium 



annuli instar amplectens 9. 0. atipitatwm, 



B. Sepala lateralia in synsepalum biapiculatum coalita. 



Labelli lobi laterales minuti, trianguli, intermedius multo 



major, flabellatus, crista 5- rarius 7-cristata 10. 0, oalochiktm. 



Species dubiae: 0. heliccmthum, 0. sivperfluum, 0. bolivianernc, 0. Wittü. 



I. 0. Jonesianum Reicbb. f. in Gard. Chron. N. S. XX. (4883) 781, XXI. 60, XXV. 

 13; Orchldopbüe (4 886) 50, c. tab. col.; Williams, Orch. Grow. Man. 7. ed. 614 < 

 The Garden XXXI. { 48, t. 583; Lindenia IL 42 et 51,' t. 72; Sander, Reiclienbachi.i 

 S. I. 47, t. 21, fig. l; Orch. Guide 183; Regel, Gartenfl. '1888) 2 49, t. 1272; Bot. 

 Mag. t. 6982; Kerchove in Rev. hört. Beige (1889) 7, t. 1 ; Veitch, Man. Orch. PI. VIII. 

 46; Cogn. in Dict. Icon. Orch. Oncid. t. 17 et in Fl. Bras. III. 6. 442, t. 92, fig. 2; 

 Chodat, PL Hassler. 119. — Pseudobulbi parvi, ovati, catapbyllis mox marcescentilni 

 vestiii, 1 ad 2 cm longi, basi ad 1 cm crassi, monophylli. Folia si longiora depen- 

 dentia, si breviora stricta, crassa, carnosa, longe attenuata, canaliculata, intense vel 

 obscure viridia, 20 ad 40 cm longa, 1 ad 1,5 cm crassa. Scapus gracilis, folia exce- 

 dens, interdum valde elongatus, dependens, ad 50 cm longus, apice florifer, floribus ad 

 10 (rarius pluribus), bracteae brevissimae, ovatae, acutae, ad 4 mm longae, pedicelli 

 cum ovariis 3 ad 3,5 cm longi. Sepalum dorsale e basi angusta obovatum, lateralia 

 aequilonga, oblonga, margine undulata, 2 ad 2,2 cm longa, 8 ad 10 mm lata, flava, 

 maculjs sat crebris purpureis ornata. Petala obovato-oblonga, undulata, omnia apice 

 rotundata, eisdem coloribus ornata, quibus sepala. Labellum magnum, explanatum, 

 unguiculatum, lobi laterales parvi, auriculiformes, rotundati, lobus intermedius maximus, 

 a lateralibus sinu amplo sejunctus, transverse oblongus, undulatus, antice leviter tantum 

 emarginatus vel bilobus, totum labellum album, maculis quibusdam purpureis pone basin 

 ornatum, a basi marginem usque anticum lobi intermedii 2,5 cm longum, 3 cm (ubi 



