570 MONOECIA TRIANDRIA- 



Spl pi- 4. p. 348. Walt. p. 230. Mich. 2. p. 178. Pursb, 1. p. 112, 

 Nutt2. p. 208. 



Stem generally erect, about twelve inches high^ obtusely four-angledj car- 

 nose, lucid, glabrous, branching sometinaes from the base, heaves oppo- 

 site, decussate, lanceolate, acuminate, coarsely serrate, three-nerved, sprinkled 

 with hairs on the upper surface, petioles very long, the lower longer than 

 the leaves. Flowers in corymbose panicles, much shorter than the petioles, 

 sometimes recurved. Sterile and fertile florets sometimes intermingled, 

 sometimes one half of the panicle will be exclusively fertile the other sterile. 

 Calyx of the sterile flower, four-leaved, leaves lanceolete. Stamens twice as 

 long as the calyx, expanding as in all the species of this genus which I have 

 examined, elastically. Of the fertile floret calyx 3? leaved, persistent. 

 Style 0. Stigma sessile. Seed compressed, ovate, glabrous. 



I have never been able to discover a nectary in the sterile florets of this 

 species. 



Grows in shaded wet soils. 



Flowers July — September. 



2. Urens. L. 



^ 



U. foliis oppositis, el- 1 Leaves opposite, ellip- 

 lipticis subquinquener- tic, somewhat 5-nerved, 

 vibus, argute serratis; acutely serrate; spikes 

 spicis glomeratis, gemi- by pairs; flowers clus- 

 natis. tered. 



F 



Sp. pi. 4. p. 352. Pursh, 1. p. 113. Nutt. 2. p. 208. 



I 



Stem about twelve to fourteen inches high, obtusely four-angled, hairy, 

 somewhat hispid, branching. Leaves opposite, cordate ovate, rugose, hairy? 

 coarsely toothed, three-nerved, with the exterior nerves .divided, sprinkled 

 besides the hairs with white prickles. Petioles nearly an inch long. Flof 

 ers in axillary racemes, two in each axil, shorter than the petiole. Sterile 

 and fertile florets intermingled. Of the sterile floret calyx four-leaved, 

 leaves hairy, obtuse; filaments longer than the calyx, expanding eiastically 

 and discharging eiastically the pollen; nectarium cyathiform; of the fertile 

 floret calyx two-leaved, persistent, seed compressed. 



Grows in damp soils, common around Beaufort; St. Mary's, Georgia. 



Flowers December to February. 



3. ClIAMOEDROIDES. Pursll. 



U. foliis oppositis, sub- 1 Leaves opposite, iiear- 

 sessilibus,ovatis,serra- ly sessile, ovate, serrate, 

 tisjsubtus strigosisj glo- [ strigose underneath • 



