Refugium Botanicum.] (November, 1872. 
TAB. 142. 
Tribe MALAXIDE. 
Genus PLEuRoTHALLIS, R. Br. 
P. cuniara, Knowle é Westcott, Kloral Cab. t.19! Lindl. B. Reg. xxvi. 
Mise. 41! Lindl. Folia, I1., ix. Plewr. No. 140, p.24! Caulbus 
secundariis dense cespitosis, radicibus tenuissimis inflexis, 
caulibus basi vaginis duabus seu ternis ancipitibus apice 
triangulis brunneis nervosis, intermedio foliifero elongato, linea 
anteriori canaliculato subtrigono, folii lamina cuneato-oblonga 
acuta apice minute tridentata, vagina ancipiti acuminata, 
pedunculo porrecto subcompresso folium subequante, racemo 
subdisticho, bracteis ochreatis acutis ovarlis pedicellatis multo 
minoribus, perigonio externo carnoso coriaceo bilabiato, sepalo 
superiori lineari-ligulato acuto, sepalo inferiori apice acuto seu 
bidentato oblongo-ligulato, bene latiori, ima basi angulato 
gibboso, tepalis multo minoribus lanceolatis acuminatis ciliatis, 
labello tepalis subeequilongo, oblongo, utrinque ante basin 
angulato, ceterum ligulato, antice ciliato, carina carnosa 
triangula utrinque a basi in discum, columna gracili trigona, 
androclinio quinquedentato, rostello transverso supra foveam, 
anthera gibba. Flores aurantiaci, labello magis ochraceo- 
rubro. 
The plant was collected by Mr. Henchman on the Masseromi 
river in Demerara, and sent to the Willmorian garden. Finally, 
it re-appeared in the Saundersian garden, coming from Rio Sal- 
ween. I never saw a wild specimen, to my knowledge. 
Secondary stems close together. toots very slender and much 
bent. Stems with two or three sheaths, the upper one the longest, 
all brown, nervous, triangular at their open end. The internode 
from the highest sheath to the leaf longer, canaliculate, nearly 
trigonous. Leaf cuneate-oblong acute, minutely tridendate. 
Sheath of inflorescence ancipitous, acuminate. Flower-stalk bent 
forwards, somewhat compressed, as long as the leaf. Raceme 
nearly distichous. Bracts ochreate acute, much shorter than the 
pedicellate ovaries. Sepals leathery to fleshy; the upper one 
linear-ligulate acute; the lower acute or bidentate, oblong- 
ligulate, much broader, angular-gibbous at its base. Tepals 
much smaller, lanceolate-acuminate, ciliated. Lip as long as 
