86 



Fr. Kränzlin. — Orchidaceae-Monandrae-Dendrobiinae. Pars ^ . 



b. Mentum extinctoriifoi'me. 



er. Labellum panduratum, utrinque et antice emarginatum 130. D. scnlptum. 



ß. Labellum trilobum 1 3 1 . D. radians. 



B. Caules elongati, fusiformes v. elongato-cvlindracei. 



a. Racemi 3 — 8-flori. 



u. Flores aurantiaci, segmenta floris omnia angusta . . 132. D. nutans. 

 ß. Flores lutei, lineae disci labelli longe pilosae, lobi 



labelli parvi 133. D. Lowii. 



y. Flores luteo-albi, lineae disci glabrae 134. D. erythropogon. 



ö. Flores albi. 



I. Lobi laterales subnulli, intermedius obovatus, emar- ( 



ginatus 135. D. Dearei. 



II. Lobi laterales parvi, lobus intermedius dilatatus, 



antice bilobus 136. D. formosum. 



III. Lobi laterales auriculati, rotundati, lobus inter- 

 medius oblongus v. oblongo-lanceolatus 137. D. draconis. 



IV. Lobi laterales semiovati, crenulati, intermedius pro- 



ductus, antice rotundatus, emarginatus 138. D. virgineum. 



b. Racemi 1 — 2- rarius 3-flori. 

 er. Mentum perbreve. 



I. Labellum panduratum 139. D.spectatissimum. 



•II. Labellum manifeste trilobum 1 40. D. cruentum. 



ß. Mentum angulatum, non extinetoriiforme 



Labellum trilobum, subito dilatatum 1 4 1 . D. Christyanum. 



y. Mentum extinetoriiforme. 



Lobus intermedius labelli brevi-lobulatus, antice 

 fimbriatus v. denticulatus. 



I. Lobi laterales obtusanguli, antice dentati. 



1. Flores albi, discus labelli medio macula magna 



lutea v. aurantiaca signatus 142. D. longicornu. 



2. Flores luteo-albi, discus labelli et lobi laterales 



macula cinnabarina notati 1 kZ.D.Luebbersianum. 



II. Lobi laterales antice rotundati, integri, plerumque 

 parvi, lobus intermedius toto margine crenulatus. 



1 . Lobus intermedius orbicularis, toto disco pilo- 



sus, labellum aureum, rubro-maculatum . . . 14 4. D. WilUamsomi. 



2. Lobus intermedius transverse oblongus, brevis; 

 labellum antice pallide aurantiacum ; ovarium 



triquetrum 1 45. D. cariniferwn. 



3. Ut praecedens, sed habitu gracilius et ovarium 



teres 146. D. Watfii. 



4. Lobus intermedius obovatus v. subquadratus, 

 disco callis margaritaeeis obsitus. 



* Folia hirsuta 1 Ll.D.niargaritaceum. 



** Folia glabra 148. D. scabrilinguc . 



III. Lobi laterales auriculati, minuti, interdum subnulli, 

 intermedius maximus, plerumque bilobus. 



1 . Petala oblonga plana. 



* Lobus intermedius labelli produetus , mag- 

 nus, euneato- oblongus; flores maximi 6 cm 



diam 1 49. D. parthenium. 



** Lobus intermedius reniformis, leviter v. vix 



emarginatus, flores 4 — 5 cm diam. . . 150. D. Fuerstenbergianum. 



