It seems logical, therefore, to regard Pleurothallis leu- 
cantha as a rather widespread and variable species in 
Central America. 
Octomeria pygmaea C. Schweinfurth sp. nov. 
Herba minutissima, epiphytica, corticicola. Caules 
perbreves, uniarticulati, vaginis duabus membranaceis 
tubulatis evanidis omnino obtecti. Folium anguste ellip- 
ticum, acutum, sessile, rigide nervosum, crasse margina- 
tum. Inflorescentiae saepissime duae vel tres,abbreviatae, 
uniflorae. Flos membranaceus, perparvus sed pro planta 
magnus. Sepala persimilia, triangulari-lanceolata, acuta 
vel acuminata, trinervia, omnino libera. Petala lanceo- 
lata vel elliptico-lanceolata, acuta vel acuminata, uni- 
nervia. Labellum in circuitu rhombico-ovatum, medio 
profunde trilobatum ; lobi laterales faleato-dolabriformes, 
porrecti; lobus medius obovato-oblongus, late obtusus, 
lobos laterales valde excedens. Columna in pedem sub- 
aequalem extensa. 
Plant minute, caespitose, epiphytic in the cracks of 
the bark. Roots fibrous, relatively stout, glabrous. Stems 
numerous, clustered, abbreviated, about 4.8 mm. or less 
long, 1-jointed near the base, entirely concealed by two 
tubular scarious evanescent sheaths. Leaf solitary, ses- 
sile, narrowly elliptic, up to about 8 mm. long and 2.1 
mm. wide, acute, conduplicate at the base, coarsely mar- 
ginate, rigid-nervose, with the mid-nerve enlarged and 
prominent beneath. Inflorescences abbreviated, 1-flow- 
ered, apparently two or three to a stem. Flower very 
small, but large in relation to the plant, membranaceous. 
Sepals free, 3-nerved, concave. Dorsal sepal triangular- 
lanceolate, acute or acuminate, about 1.75 mm. long and 
0.75 mm. wide. Lateral sepals very similar, but a little 
longer and wider, oblique. Petals lanceolate to elliptic- 
lanceolate, acute or acuminate, 1-nerved, about 1.5 mm. 
[ 58 ] 
