— 
——— 
ie 
; 
4 
: 
4 
et 
Pad : 
‘Crass XVIL—DIADELPHIA. 
- ss L_-PENTANDRIA. — 
486. PETALOSTEMON. Michaux. 
Petals 5, nearly equal, 4 of them alternating 
with the stamina, and uniting with them in a 
cloven tube. Legume 1-seeded, included in the 
calix. 
Herbaceous perennials, with pinnated glandulous leaves, 
and setaceous stipules; flowers purplish or white, densely, 
_and almost imbricately spiked or capitulate, squamosely 
bracteate. (Petals small, nearly uniform, occupying the 
. Place of Sof the 10 stamina usual inthe Papilionacee, 
- 4 of them alternating with the 5 stamina, and the 5th oc- 
. . Cupying the place of the single unconnected stamen.) 
Species. 1. P. candidum. 2.-carneum. 3. vielaceum. — 
This beautiful species, which retains its fine colourso well — 
-in the herbarium, and No. 1, are every where abundant _ 
throughout Upper Louisiana probably to the sources of © 
the Missouri. Nos. 2 and 5 ave peculiar to the warmer — 
Auantic states. 4.* villosum. Every where villous; stem 
decumbent; spike larger, cylindric, subsessile; bractes — 
shorter than the calix, calix lanuginous, 5-toothed; leaf- _ 
lets linear-oblong, about 7 pair, petals rosaceous. HAB. — 
On the sandy bari of Knife river, near Fort Mandan, — 
Missouri. F 
A taba in August. Ons, Root fusiform, . 
large, red, and perennial, sending out several 
decumbent 
ems; spikes 2 or 3 inches lon th 
species; calix striate; petals ie www sty 
A North Ametican genus 
Ba gai * 
H_—HEXANDRIA, 
