MALAXIDEJE. PLEUROTHALLEJE. 5 
of a species from Mexico, and of another from Rio, both of which are no 
doubt undescribed, but I am unwilling to publish them without better 
materials. 
1. PLevrRorTHALLis ruscifolia. R. Br. 
P. folio ovali-lanceolato caulis longitudine, floribus fasciculatis, spathá 
bivalvi, pedicellis 2-3-bracteatis filiformibus floribus longioribus, sepalis 
ovato-lanceolatis: lateralibus connatis, petalis lineari-lanceolatis mino- 
ribus, labello oblongo undulato obtuso. 
Epidendrum ruscifolium. Linn. sp. pl. 1353. Jacq. Amer. 226. t. 133. f. 3. 
Dendrobium ruscifolium. Swartz! n. act. Ups. 6. p. 84. Willd. n. 16. 
Pleurothallisruscifolia. R, Br. in Hort. Kew. 5.211. Hooker Ex. Fl. 197. 
Hab. in Jamaica super arbores, Swartz; in insulis Caribeis, De Ponthieu, 
(v. s. sp. in Herb. Banks. et v. cult.) 
Dr. Hooker's figure is authority for this species, and it is from it that I 
have framed my specific character. It is extremely probable that more 
species than one are confounded under the same name. Ihave specimens 
from Rio of what is no doubt nearly allied to this, but which differs in the 
form of the leaf, and in having a ciliated Labellum ; my specimens are not 
good enough to describe. | 
9. PrLEvROTHaALLIS laurifolia. ^ Kunth. 
P. “ caule monophyllo, folio oblongo acuminato basi angustato, floribus 
fasciculato-congestis, foliolis calycinis exterioribus lateralibus apice 
liberis." Kunth. in Humb. et Bonpl. n. g. et sp. 1.364.  synops. 1.346. 
Hab. in devexis Andium Popayanensium alt. 1200 hex. florens Novembre ; 
Humboldt et Bonpland. 
Related to P. ruscifolia, according to Kunth. 
3. PLEUROTHALLIS succosa. 
P. caule tereti folio ovato-lanceolato succoso tripld longiore, floribus fasci- 
culatis subsessilibus, sepalis lanceolatis: lateralibus omnind connatis, 
petalis linearibus subulatis, labello minimo ovato carnoso recurvo co- 
lumne longitudine. 
Humboldtia succosa. Pavon. in Herb. Lamb. 
Hab. in Peruvia, Pavon. (exam. s. sp. in Herb. Lambert.) 
Caulis semipedalis. Folium 2 uncias longum. Petala integra, sepalis 
pauld breviora. Columna nana, anthera horizontali subglobosa. 
4. PLEUROTHALLIS cordata. 
P. caule tereti sulcato folio subrotundo horizontali alt? cordato acuminato 
multo longiore, floribus fasciculatis e spatha brevi coriacea subexsertis, 
Humboldtia cordata. Fi. Peruv ! syst. p. 234. 
Stelis cordata. Pers. syn. no. 3. 
Hab. in Peruvia; Pavon. (v. s. defl. in Herb. Lambert.) 
Gigantea. Caules validi, erecti, esquamati, fere pedales, Folia horizontalia, 
32 uncias longa, sinubus baseos cordate imbricantibus. Alabastrum uni- 
cum vidi valde juvene subglobosum, unde sepala rotundata conjicio. 
? 5. PrEvRorBALLIS lanceolata. 
P. caule ascendente tereti folio ovato lanceolato erecto fer? triplo longiore, 
