234 Fr - Kränzlin. — Orchidaceae-Odontoglosseae IL 



A. Labellum longius quam sepala petalaque. 



a. Labelli lobi laterales breviusculi, auriculati, crista labelli 

 bicruris, carina in dentem exeunte interjecta. Phylla 



florum plerumque vittata 242. 0. tigrinum. 



b. Lobi laterales labelli subrhombei obliqui, crista a fronte 

 visa linearis, a latere visa dentem prosilientem triangulum 



exhibens. Labellum album purpureo-adspersum . . . . 243. 0. rhodostictum. 



c. Labelli lobi laterales trianguli reflexi, gynostemium am- 



plectentes, crista tricruris, apice bicornis 244. 0. reflexum. 



B. Labellum brevius quam sepala petalaque. 



Lobi laterales fere omnino obsoleti, crista basi simplex, antice 

 tridentata vel trigibbosa, additis carinis 2 brevibus et tuber- 

 culis quibusdam minoribus 245. 0. guatemalensc. 



242. 0. tigrinum La Llave et Lex. Nov. veget. descr. fasc. II. (1825) 36; Lindl. 

 Gen. et Sp. Orch. (1832) 203; Fol. Orch. Oncid. 45; Reichb. f. in Walp. Ann. VI. ( 1 861) 

 794; Williams, Orch. Alb. III. t. 137; Orch. Grow. Man. 7, ed. 633; Sander, Reichen- 

 bachia II. 87, t. 88; Veiten, Man. Orchid. pl. VIII. 8 4 c. icone; Gogn. in Dict. Icon. Orch. 

 Oncidium PI. 4. — Var. splendidum Hook. f. in Bot. Mag. (1870) t. 5878; Fl. d. serres 

 XVIII. t. 1825; Lindenia t. 747. — Var. unguiculatum Lindl. in Journ. Hort. Soc. I. 

 303 c. ic. et in Paxt. Fl. Gard. II. ic. 13 4; Cogn. Dict. Icon. Orch. Oncidium, t. iA. — 

 Var. Montefiorae Cogn. 1. c. t. 4.R — Oncidium splendidum A. Rieh, ex Duchartre in 

 Journ. Soc. Imp. Hort. Paris (1862) 50; Fl. d. serres sub t. 1825. — One. Barkeri Lindl. 

 in Bot. Reg. (1841) Mise. n. 174; Sert. Orchid. sub t. 48; Paxton, Mag. XIV. 97; Lemaire, 

 111. Hortic. (1854) t. 2. — One. ionosmum Lindl. in Gard. Chron. (1853) 726. — 

 Odontoglossum tigrinum Lindl. Fol. Orch. Odontogl. (1852)5. — Pseudobulbi dense 

 aggregati, ovoidei vel subglobosi, parum compressi, in angulis obtusi, di- vel tripbylli, 

 7 ad 1 cm longi, 4 ad 6 cm lati, 3 ad 4 cm crassi, virides vel rubro-suffusi, juniores 

 laeves, vetustiores plus minus rugulosi. Folia linearia vel lineari-oblonga, acuta vel 

 acuminata, coriacea, 2 ad 30 cm longa, ad 3 cm lata. Inflorescentia racemosa vel 

 paniculata, 50 ad 80 cm longa, in tertia superiore florifera, bracteae et ramorum et 

 florum lineares, acuminatae, circ. 1 cm longae, basi 2 mm latae, pedicelli cum ovario 

 vix crassiore 3 ad 4 cm longi, supra curvati. Sepalum dorsale oblongum, obtuse 

 acutatum, margine leviter undulatum, lateralia in tertia superiore connata, deinde energice 

 divergentia, in parte libera oblongo-lanceolata, acutiuscula, margine undulata, omnia 

 viridi-lutea vel lutea, purpureo-vittata, apice et in nervis medianis postice valde pro- 

 silientibus viridia, 2,5 — 3,5 cm longa, 1 ad 1,5 cm lata. Petala oblonga, obtusa, 

 aequilonga, sublatiora, ad 1,8 cm longa. Labelli lobi laterales oblongi, apice rotundati, 

 aurium instar divergentes, lobus intermedius longe unguiculatus, subito in laminam 

 subquadratam obtusangulam, antice leviter emarginatam dilatatus, (si mavis unguiculata, 

 reniformis), callus crassiusculus in ungue tricruris, crure mediano longiore, antice (fere 

 medio in ungue) in dentem acutiusculum exeunte, additis utrinque costis longitudinalibus 

 brevioribus, totum labellum intense luteum, unicolor, unguis cum lobis lateralibus 1,8 cm 

 longus, lamina 2,5 cm longa, 4 cm lata, lobi laterales 1 cm loügi, 5 ad 8 mm lati. 

 Gynostemium pro flore breve, 7 mm longum, alae satis magnae, suborbiculares, margines 

 gynostemii infra foveam stigmaticam crassiusculi, nitidi, anthera pro flore minuta. — 

 Flores odorem Violae nostrae exhalant. 



Var. unguiculatum Lindl. 1. supra cit.; Reichb. f. in Walp. Ann. II. 789. — O. 

 unguiculatum Klotzsch in Otto et Dietr. Allg. Gart. Ztg. XVII. 9 (non Ldl.) ; Reichb. f. 

 in Walp. Ann. III. 556. — Differt a typo inflorescentia diffusiore, amplius ramificata, 

 perigonii phyllis non vittatis, sed irregulariter maculatis, ungue labelli angustiore, lamina 

 minore, 1,8 cm longa, 3 cm ' utplurimum lata. 



Var. Montefiorae Gogn. 1. supra c. — Differt a typo sepalis petalisque pallide 

 viridi-luteis, maculis vix intensioribus vittatis, plus minus manifeste brunneis, labello 

 pallide sulfureo. 



