71 



habit of P. Grobyi, auil of no beauty. It grows in dense tufts on the 

 branches of trees. 

 / 16. P. scariosa {Dendrobium scatiosum, Llave 2. 39.) ; caule brevissimo foho 

 elliptico carnoso supra hyaUno margine scarioso, pedunculis 3-4 filifor- 

 mibus flexuosis secundifloris, sepahs concavis, petaUs plauis, labello tri- 

 partite. Mexico. Planta exigua. FoUa enervia. Spatha mem- 



branacea brevissima in sinu fohi. Sepala luteo-virescentia. Petala 

 nivea, hnea longitudinah hmboque purpurascente variegata, ex La Llave. 



17. P. aristata (Lindl. in ann. nat. hist. 4. 116. 2. 329. t. 15.) ; csespitosa, 

 folio ovali acuto apiculato basi angustato caule longiore, racemo capillari 

 flexuoso erecto 4-6-floro folio ter longiore, bracteis vaginantibus cuspi- 

 datis, pedicellis elongatis, sepalis aristatis subciliatis laterahbus semi- 

 connatis, petalis lanceolatis acuminatis semipinnatifidis duplo brevioribus, 

 labello lineari glanduloso-hispido apice rotundato basi glabro utrinque 



auriculato. Bemerara. Flowers purple, apparently streaked with 



yellow. 



18. P. laxa (L. 13.) ; "caule monophyllo, folio oblongo acuminato, racemis 



laxis, capsidis nudis." Jamaica. P. alpestri valde affinis; utraque 



bracteis cucullatis distincta. llacemi foliis subeequales. Flores secundi, 

 atropurpurei, lineati. Bracteai cucullata;. Sepala lateralia semiconnata. 

 Labellum ovatum, canaliculatum, apice reflexum, coerulescens. 



19. P. aJpestris (L. 14.) ; " caide monophyllo, folio ovato-lanceolato, race- 



mis laxis, carinis capsularum muricatis." Jamaica. Racemi folio 



ssepe longiores. Flores parvi, secundi, luteo-virides. Sepala lateralia 

 semiconnata. Labellum ovatum, obtusum, concavum, minutum, atropur- 

 pureum. 



** Spicatce ; nempe pedicellis quam bractese brevioribus 

 y. vix longioribus. 



t Disepalse. 



20. P. racemifim-a (L. no. 8. Ex. Fl. t. 123.); folio oblongo emarginato ra- 

 cemo secundo multifloro duplo breviore, bracteis vaginalis appressis, 

 sepalis ovato-lanceolatis: lateralibus connatis petalis ovatis subsequalibus, 

 labello subunguiculato linguseformi obtuso piano, clinandrio dentato. 

 Jamaica. 



21 . P. glumacea (Lindl. in Comp. to Bot. Mag. 2.); folio lanceolato petiolo 

 longiore, spica nutante multiflora foliis 3-plo longiore, sepalis linearibus 

 acuminatis subsequalibus inferiore bicarinato, petalis oblougis, labeUo 



ovato concavo obtuso.' Brazil. Flowers yellowish. The narrow 



sharp pointed sepals have something the appearance of the glume of a 

 grass. 



22. P. lanceolata (L. no. 5.) ; caule ascendente tereti folio ovato-lanceolato 



erecto basi angustato fere triplo longiore, racemo solitario folio longiore 

 apice nutante e spatha maxima coriacea dimidiam folii fere sequante. 



Peril. Taking the stem and spike together this plant is a foot 



and half high, while the leaf is about seven inches long. The synonyms 

 of Humboldtia and Stelis lanceolata, quoted in the Gen. and Sp. belong 

 to Stelis disticha of Poppig, according to a specimen in Willdenow's 

 herbarium. 



23. P. caulijlora (Hook. ic. pi. t. .OO.); folio subrotuudo-ovato petiolato ra- 

 cemis secundis fasciculatis duplo breviore, spathii oblonga obtusa vagi- 



