We take this opportunity of filling a spare leaf with the 

 characters of some unpublished species of Pleurothallis, toge- 

 ther with a new arrangement of the genus, and a few remarks 

 upon SpecJdinia and Physosiphoji. 



PLEUROTHALLIS. 



§. 1. Acaules. Flores aggregati v. solitarii. 



8p. L ruscifolia; 2. laurifolia ; 3. succosa; 4. tribuloides ; 5. cordata. 



6. P. grandijiora ; folio perfoliate oblongo-lanceolato caudato apice triden- 

 tato, pedunculis unifloris fasciculatis, sepalo supremo ventricoso acuminato late- 

 ralibus in uimm coanatis recurvis triplo latiore, petalis lineari-lanceolatis hispido- 

 ciliatis, labello breviore ungiiiculato subrotundo carnoso ciliato supra unguem 



excavato. In Peruvia ; supra arbores in convalle Lloee, alt 8O00-ped, Hall. 



{hab. s. sp. comm, eel. Hooker.^ 



7. V. angustifolia ; caulibus ascendentibus folio lineari-lanceolato longiori- 

 bus, floribus pedicellatis subsolitariis, sepalis carinatis, petalis lanceolatis denti- 



culatis, labello lineari acuto marginibus pone basin incrassatis. In Mexico, 



prope Xalapam, Deppe. (Ji. s. sp.) 



8. P. hidentata ; caulibus ascendentibus folio oblongo-lanceolato apice bi-tri- 

 dentato longioribus, floribus pedicellatis subsolitariis, sepalis ecarinatis, labello 

 lineari obtuso apice ciliato. Prope Rio Janeiro, Forbes, (h. s. sp.) 



9. P. papulosa ; caulibus strictis folio anguste oblongo apice tridentato paulo 

 longioribus, pedunculis subaggregatis unifloris flore vix longioribus, sepalis cam- 

 panulatis lateralibus semiconnatis supremo oblongo brevioribus, labello subbastato 



obtusissimo apice vittisq. duabus elevatis carnosis papillosis Li BrazilicB 



prov. Minarum in arboribus ad S. Joao Baptista, Martins {ex. s. sp. in hb. M.) 

 Flores majusculi. 



_10« y- discoidea; caulibus strictis folio ovato-lanceolato brevioribus, pedun- 

 cuhs solitariis unifloris, sepalis oblongis acutis lateralibus omnino connatis, petalis 

 Imearibus acuminatis decurvis, labello cordato-ovato undulato obtusiusculo sepalis 



subffiquali. In insula Trlnitatis {v. ic. pict. in hb. Hooker.) Facies P, 



ruscifolicE. Flores flavi macula sanoruinea oblonsfa antice bidentata in medio 

 labelli. 



11. r. punctata; caulibus strictis folio crasso ovali plano-convexo marginato 

 longioribus, floribus solitariis breviter pedicellatis, petalis lanceolatis apice pubes- 



centibus, labello unguiculato cordato-sagittato obtuso, columna elongata. In 



Brazilia {exam, v. c). Folia subtus purpureo punctata. Flores atropurpurei. 

 Petala berbacea. Tota planta vix 1 { poll. alta. 



