48 
pubescens, 
DIDYNAMIA, GYMNOSPERMIA 
Snalke-head. 
From two to three feet high. Flowers cream-coloured. 
The corolla has some faint resemblance to a snake’s head. 
In similar places with Mimulus ringens, and alatus. Perennial. 
July, August. 
290. PENTSTEMON. Gen. pl. 1758. (Scrophularie.) 
Calix 5-leaved. Corolla bilabiate, ventri- 
cose. The jifth sterile filament longer than 
the rest and bearded on the upper side. 
Anthers smooth. Capsule ovate, 2-celled, | 
2-valved. Seeds numerous, angular.— 
Nutt. , 
1. P. stem pubescent, leaves serrulate, lanceolate- 
oblong, sessile ; flowers paniculate, sterile fila- 
ment bearded from the apex as far as below 
the middle.—Willd. and Pursh. 
Chelone Pentstemon, Mant. 415. 
A very elegant plant, from ten to fifteen inches high. Flow- 
ers pale-purple or blue. On the borders of open woods and 
fields; common. Perennial. July. 
291. EUCHROMA. Nutt. Gen. Am. pl. vol. 2. p. 54. 
(Pediculares.) 
€alix spatheform, bifid, and emarginate, or 
quadrifid, with the segments subulate. Co- 
rolla bilabiate, upper lip very long and 
linear, embracing the style and stamina; 
lower lip short and trifid, without glands. 
Anthers linear, with unequal lobes, all co- 
hering in the form of an oblong disk. Cap- 
sule compressed, ovate, oblique, 2-celled, 
2-valved; dissepiment medial, bipartile. 
Seeds numerous, and small, surrounded 
with a membranaceous inflated vesicle.— 
Nutt. 

