82 y 
Art. XIV.- — Descriptions qf two new Genera of’ Nepaul Plants. 
By Mr David Don, Curator of the Lambertian Herba- 
rium 
SPECIES belonging to one of the new genera now to be 
described, has been published long ago by Roxburgh -j*, un- 
der the name of Incarmllea parasitica. It is surprising that 
so acute an observer should have referred his plant to Incar- 
villea^ a genus with which it scarcely agrees in one single point. 
The genus in question, which I propose to call TricJiosporum,, 
is remarkable for the singular structure of its capsule and seeds. 
The capsule is a span or even a foot long, ensiform, compressed, 
4-celled, ^valved ; when ripe, the valves separate from each 
other, along their whole length : the septum finally bursts at 
the margin, continuing, however, always firmly fixed at its 
middle ; the sides then become erect, and embrace each other. 
The seeds are very numerous, oblong, cylindrical, and rough, 
with minute warts; emitting at the base one. and apex two 
very long silky hairs. These hairs are consequently so nume- 
rous, that they completely cover the seeds, as in plants of the 
OvdiQY Asclepiadea. Lysionotus, the other genus, agrees in many 
respects with Tricliosporumy but differs in the two-celled valves 
of the capsule bursting at the suture on the back ; the seeds being 
smooth, and attenuated at both ends into a caudiform capillary 
appendage ; and in having a 5-leaved calyx, and also in habit. 
The genus Didymocarpus of Wallich comes very near, both in 
habit and structure,, to Lysionotus ; but is advantageously dis- 
tinguished from it, by its smooth ovate seeds, destitute of any 
appendage, and by its monophyllous 5-toothed calyx. These 
three genera form a small family of plants, to which the name 
of Didymocarpea may be given. They differ essentially from 
the BignmiacecRy as limited by Mr Brown, to which they are 
nearly related, in having a simple clavate stigma, pendulous,, 
minute, ovate or cylindrical, frequently appendaged seeds ; in 
the structure of their capsule, and form of their embryo. The 
plants which compose this little family, are all natives of Nepaul 
* Read before the Wernerian Society, 26th January 1822.. 
Plnnt. Coromandel, t. 291 , 
