MONOECIA TRIANDRIA. 
571 
merulis axillaribus, ses- 
silibus. subglobosis, re- 
flexis; caule stimuloso. 
cluster of flowers axil- 
lary, sessile, somewhat 
globose, reflexed; pric- 
kles stimulant. 
Pursh, 1. p. 112. Nutt. 2. p. 203. 
Stem nearly simple, glabrous, four to six inches high. Leaves ovate, on 
short petiols, hairy underneath, sprinkled with a few hairs and white 
prickles on the upper surface, small, and for their size coarsely toothed. 
Flowers in compact axillary clusters scarcely longer than the petioles, the 
upper florets fertile, the lower sterile. Calyx of both florets hairy. 
Collected on St. Simons, Georgia, by Mr. Lyon. 
Flowers February to March. 
4. Dioica. 
Leaves opposite, cor- 
date, ovate lanceolate, 
coarsely serrate; flow- 
ers dioecious; spikes 
paniculate, by pairs, 
longer than the petiole; 
flowers clustered. 
Sp. pi. 4. p. 352. Mich. 2. p. 179. Pursh, 2. p. 1 13. Nutt. 2. p. 208. 
Stem branching and with the leaves and whole plant very hispid. Leaves 
cordate, ovate, slightly acuminate; acutely and deeply serrate, nerved, on 
petioles one to one and a half inches long. Flowers dioecious, (more fre- 
quently monoecious, Mich.) in clustered panicles, two from each axil. 
In this species and in U. Urens the calyx of the fertile floret is four-leav- 
ed, two leaflets ovate cordate, two others opposite, very small. Leers in 
Sp. pi. 1. c. 
Grows along roads and in waste places, from Canada to Carolina, Pursh. 
I have not seen this species in the low country. 
Flowers June — August. 
U. foliis oppositis,cor- 
datis, ovato-lanceolatis, 
grosse serratis; floribus 
dioicis; spicis panicula- 
tis, glomeratisjgemina- 
tis, petiolo longioribus. 
5. Procera. Muhl. 
U. foliis oppositis, o- 
vato lanceolatis, serra- 
tis; petiolis ciliatis; flo- 
Leaves opposite, o- 
vate-lanceolate, ser- 
rate; petioles fringed; 
