126 
DIDYNAMIA ANGIOSPERMIA. 
CHELONE. Gen. Pl. 1005. 
Calyx 5-partitus, 
3-bracteatus. Corol- 
la ringens, ventricosa. 
Filamentum quintum 
sterile, caeteris bre- 
vius. Capsula 2 loo 
ularis, 2-valvis. Se- 
mina pluriraa, mar- 
gine membranacea. 
1. Glabra. 
C. foliis oblongis, 
lanceolatis, acumina- 
tis, serratis, subsessili- 
bus, glabris j floribus 
albis. 
Calyx 5-parted, 
with 3 bracteal leaves 
at base. Corolla rin- 
gent, ventricose. A 
fifth fdamenl sterile, 
shorter than the rest. 
Capsule 2-celled, 2- 
valved. Seeds many, 
with the margin mem- 
branaceous. 
Leaves oblong, lan- 
ceolate, acuminate, 
serrate, nearly sessile, 
glabrous ; flowers 
white. 
Sp. pl. 3. p. 225. Mich. 2. p. 24. var. alba. Pursh 2. p. 427. 
Nutt. 2. p. 51. 
Root perennial. Stem herbaceous, angled, taking root at the joints, 
2 — 3 feet high. Leaves generally opposite, 2 — 4 inches long, slightly 
acuminate, nearly sessile, and rather obtuse at base, somewhat rugose yet 
glabrous. Flowers in all the species, in compact, imbricate, terminal 
spikes. Bracteas shorter than the calyx. Segments of the calyx obtuse, 
nearly round. Corolla large, white, bearded internally on the lower lip. 
Stamens shorter than the corolla. Anthers as in the whole genus, woolly 
Yar. Lanceolata. Nuttall. 
Leaves lanceolate, conspicuously acuminate, serrate, sessile, under sur- 
face pubescent. Bracteas scarcely dilated. Segments of the calyx ob- 
long. Probably a distinct species. Nutt. Near Columbia and through 
the middle country the C. Glabra of Walter (p. 172.) is found and agrees 
very nearly with this variety. The leaves are larger than those of any 
specimens I have seen from the Northern States, pubescent, almost hairy 
underneath, the flowers large, numerous and very compactly imbricated. 
Sent me by Mr. Herbemont. 
Flowers in the summer. (July — August. Pursh.) 
