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characters of some unpublished species of Pleurothallis, toge- 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 Specklinia and Physosiphon. 
PLEUROTHALLIS. 
S. 1. Acaules. Flores dygregati v. solitarü. 
Sp. 1. ruscifolia; 2. laurifolia; 3. succosa; 4. tribuloides ; 5. cordata. 
6. P. grandiflora ; folio perfoliato oblongo-lanceolato caudato apice triden- 
tato, pedunculis unifloris fasciculatis, sepalo supremo ventricoso acuminato late- 
ralibus in unum connatis recurvis triplo latiore, petalis lineari-lanceolatis hispido- 
ciliatis, labello breviore unguiculato subrotundo carnoso ciliato supra unguem 
excavato, In Peruvia ; supra arbores in convalle Lloz, alt 8000-ped, Hall. 
(hab. s. sp. comm. cel. Hooker.) 
7. P. 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. (h. s. sp.) 
8. P. bidentata ; 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. papillosa ; caulibus strictis folio angusté oblongo apice tridentato paulo 
longioribus, pedunculis subaggregatis unifloris flore vix longioribus, sepalis cam- 
panulatis lateralibus semiconnatis supremo oblongo brevioribus, labello subhastat * 
obtusissimo apice vittisq. duabus elevatis carnosis papillosis In Brazilie 
rov. Minarum in arboribus ad S. Joáo Baptista, Martius (ex. s. sp. in hb. M.) 
ores majusculi. ; 
„10. P. discoidea ; caulibus strictis folio ovato-lanceolato brevioribus, pedun- 
culis solitariis unifloris, sepalis oblongis acutis lateralibus omnino connatis, pe 
linearibus acuminatis decurvis, labello cordato-ovato undulato obtusiusculo se 
subequali, In insula Trinitatis (v. ic. pict. in hb. Hooker.) Facies P. 
Sean onn Flores flavi maculá sanguineä oblonga anticé bidentatá in medio 
11, P -punctata ; caulibus strictis folio crasso ovali plano-convexo marginato 
longioribus, floribus solitariis breviter pedicellatis, petalis lanceolatis apice A 
centibus, labello unguiculato cordato-sagittato obtuso, columna elongata.— +40 
Brazilia (exam. v.c.). Folia subtus purpureo punctata. Flores atropurpure» 
Petala herbacea. Tota planta vix 13 poll. alta. 
