ORDER CII. POLYGON ACE^. 489 



pummit. Flowers usually solitary, alternate, small, on short pedicels. 

 Perianth white. VuMriangular, shining, black — £}. July — Sept On 

 rocks. 6 — 10 inches. 



b. Flowers in axillary or terminal spikes. Stamens 5 — 8. Stigmas 

 mostly 2. 



4. P. tuncta tvm, (Ell. ) Stem slender, branched, sometimes decum- 

 bent at the base. Leaves with pellucid punctures, lanceolate, acute, 

 •with a sheathing petiole, scabrous on the margin and midrib. Stipules 

 ciliate, pubescent. Flowers in filiform spikes. Stamens 8. Styles 3- 

 parted. Plant very acrid. — 0. Aug. — Sept. Wet ground. 1 — 2 ft. 



Water Pepper. Smart-v:eed m 



5. P. mite, (Pers.) Stem decumbent and erect, hairy at the summit, 

 branching. Leaves narrow-lanceolate, acuminate, entire, with long 

 cilias. Flowers in crowded spikes. Stametis 8. Styles 3-parted. Pe- 

 rianth purple. — O. July — Sept. Ditches and ponds. 1 — 2 feet. 



6. P. Virginia >tm, (L.) Stwi simple, hairy toward the summit. 



I broad-lanceolate, acuminate, scabrous, with fringed serratures. 

 Stipules ciliate. Spikes axillary and terminal. Stamens 5. Styles 2. 

 Perianth white. — 2£. July — Aug. Shady woods. 2 — i feet. 



7. P. seta ceum, (Bald.) Stem erect, glabrous. Leave s broad-lance 

 olate, acuminate. Stipules long, fringed. Flowers in hirsute spikes, on 

 long peduncles. Stamens 8. Style 3-cleft Perianth white. — 2£. June 

 —Aug. Stiff soils. 1—2 feet. 



S. P. mp.su tum, (Walt.) Stem erect, decumbent, branching, hairy. 

 Lea res oblong, often slightly cordate at the base, hairy, entire. Flowers 

 in slender spikes. Stamens 8. Style 3-cleft. Perianth white. — If. 

 May — Aug. Shallow ponds. 1 — 2 feet 



9. P. incarna'tum, (Ell.) Stem geniculate, slightly angled, scabrous 

 toward the summit. Leaves lanceolate, serrulate, pubescent on the un- 

 per surface, large. Flowers in several simple spikes. Stamens 6. Style 

 2-cleft. Perianth white, or rose-colored. — If. July — Oct. Ditches 

 and ponds, 2 — 3 feet. 



10. P. Pennsylva'nicum, (L.) Stem geniculate, with swollen joints, 

 glabrous, angled. Leaves lanceolate, slightly hairy, petioled. Flov:ers 

 in crowded oblong spikes, large. Stamens 8. Style 2-cleft. Peduncles 

 hispid. Perianth reddish. — 0. July — Sept Margins of ponds. 2 — 

 4 feet. 



11. P. orientate, (L.) Stem erect. Leaves large, ovate, acuminate, 

 minutely pubescent, petioled. Stipules hairy. Flmcers in crowded 

 spikes, large. Stamens 6. Styles 2. Perianth rose-color, or white. — 

 ©. July — Aug. Cultivated grounds. 4 — 5 feet. Prince's Feather. 



c. Spikes in panicles. 



12. P. polvga'mum, (Vent.) Stem erect, branching, glabrous. Leaves 

 small, sessile, with glabrous stipules. Spikes paniculate, jointed. Flow- 

 ers solitary at each joint. Stamens 8. Styles 3. Perianth white. — 

 ir . Julv — Sept. Pine-barrens. Middle Car. and Geo. 6 — 8 inches. 



01* 



