Bhizome filiform, creeping widely, with nervous plaited sheaths. 
Aérial roots numerous, filiform, flexuose or straight. Secondary 
stems short, semi-terete, channelled, with few nervous sheaths. 
Leaf fleshy, oblong-lanceolate acute, with three teeth, the central 
one like a short acute bristle, the lateral ones straight triangular 
or uncinate; colour green on the outside, with dark purplish 
middle nerve and limb, and many purplish blotches on the under 
side. Flowers one or two, not developed at once, whitish with 
purplish nerves. Tepals equal. Lip whitish, with numerous pur- 
plish dots, so close to one another that it appears nearly purplish 
brown; I have also seen it entirely purplish brown. Upper sepal 
oblong-acute, with seven purplish streaks ; inferior sepal oblong- 
ligulate, cochleate-acute, bidentate, the purplish ribbons confluent. 
Tepals rhombeo-ligulate, serrate at their apex, three-nerved. Lip 
with a short claw, then rounded and oblong obtuse, with one short 
blunt auricle on each side, finely toothed round the limb, with 
many acute warts. Column slender, widened at its apex, with a 
sharp tooth on each side and a finely toothed limb round the 
anther. 
Materials:—Specimen sent by W. Wilson Saunders, Esq.; 
a most correct sketch of his own, showing a single flowering stem 
at once; and my own sketches and descriptions from the living 
plant. 
Tab. 120.—A plant: I never saw, neither can I understand its 
having three flowering stems at once, and one of them also two- 
flowered at once. 1, 2, apex of leaves + ; 3, side view of flower + ; 
4, expanded flower, front view +; 5, side view of flower, sepals 
cut +; 6, lip +; 7, lip, artificially expanded + ; 8, column, oblique 
side view -+; 9, column, front view +; 10, pollinia, side view + ; 
11, same, front view +. 
This is a little trailing Orchid, which I received jrom 
M. Linden, of Brussels. Treated as the two species of Pleuro- 
thallis, Nos. 118 and 119, it grows freely, and produces its 
pretty flowers, which have the lip beautifully mottled with 
crimson.—W. W. S. 

