DENDROBIUM. 



ORCHIDES. 309 



152. DENDROBIUM GEMINATUM Lindl. Orch. 77. Desmotrichum getninatum BJ. Bijdr. 332. 



153. DENDBOBIUM TRIFLORUM Lindl. Orch. 77. Desmotrichum triflorum BI. Bjdr. 331. 



154. DENDROBIUM GRANDIFLORUM Lindl. Orch. 77. Desmolrichum grandiflorum Bl. 

 Bijdr. 331. 



155. DENDROBIUM CONVEXUM Lindl. Orch. 76. Desmotrichum convexum Bl. Bjdr. 331. 



156. DEiNDROBlUM ANGUSTIFOLIUM Lindl. Orch. 76. Desmotrichum angustifoUum Bl. 

 Bjdr. 330. 



Subordo II. EJPMnEWnMEAtE, 



1371. EPI»EI¥»RIJM[ L. 



Huc: Lindley, Folia Orchidacea Fol. l Part. IL IIL IV.: 



Sepala patentia, subaequalia, lateralibus basi haud productis. Petala 

 nunc conformia et aequalia, nunc diversissima. Labellum unguiculatum, 

 cum columna parallelum et omnino v. parte connatum: limbo integro v. 

 diviso. basi saepius callo duplici, costa v. tuberculo nunc interjectis, 

 inslructo; nunc verosimiliter in calcar productum pedicello immersum 

 ideoque columnae cuniculum formans. Columna elongata: clinandrio 

 marginato saepe fimbriato, semiteres, ecornis, basi saepius cuniculala. 

 Pollinia 4, cereacea , aequalia, compressa; caudiculis totidem replicalis; 

 glandula libera nulla. Anthera carnosa, 2 — 4-locularis. 



Herbae epiphytae Americae calidioris , nunc terrestres. Caulis nunc pseudobulbosus, 

 nnnc elongatus foliosus. Folia carnosa , rarissime venis elevatis striata. Flores soli- 

 tarii , spicati, racemosi, corymbosi v. paniculati , terminales v. laterales . saepius sic- 

 cati coriacei, raphidibus farcti. 



In this extensive genus , Ihere exist such very remarkable differences in the man- 

 ner of growth, as vvould almosl justify the creation of several distinct genera for 

 Iheir reception. The three first divisions in the foHowing classiflcation have , for in- 

 stance. a pseuJobuIb instead of a true stem , and a lip free from the cohimn instead 

 ol being ndherent to ii; but on ihe other hand , four other divisions have a pseudo- 

 bulbous growih combined with an adherent lip , and among the Osmophytes and En- 

 cyclian species . the lip adheres to the column in different degrees; so that such di- 

 stinctions fail when applied to practice. Beyond these differences , I see little that 

 promises to be avaiiable for generic purposes; and since it must be admilted that 

 therc is something in the peculiar aspect of the genus which usually points it out to 

 even an inexperiencod eye , any proposal of new genera seems lo me unadvisable. 



The essential character of the genus resides in the lip being raore or less united by 

 a fleshy base to the edges of a column, which is hornless and considerably elongated, 

 but not petaloid and winged; in the pollen-masses being four, equal , compressed, 

 with as many pulverulent caudicles folded back upon them ; and finally in ihe pre- 

 sence of a cuniculus more or less deep at the base of tlie lip. Among ihe genera 

 most nearly allied to Epidendrum, Jsochilus , of which Ilexisea is a seclion with ad- 

 nate labellum . has two caudicles to which ihe pollen-masses adhere by their whole 

 face; Ponera is an Isochilus wiih the menium of a Maxillaria; Dinema is remarkable 

 for its two-horned column , etc. , and pair of caudicles; Barkeria , so like Amphi- 

 glollium in habit , has a petaloid column; Vhysinga has a scrotiform free spur . etc. ; 

 Broughlonia differa in having an exlernal adnaie spur , and a mebrauous cucullate lip- 

 As to Alamania . ihe transverse appendage of its lip , and some peculiarity of habit, 

 are all tbat it can be said to have for its character. 



For ihe rcasons abovc given, I do not ihink it cxpedient to regard Ihe following 



