CALLITRICHACE^. 645 



cent, as long as the cuspidate bracts ; stigmas slender, hairy. — Sandy coast 

 of South Florida. August to October. — Stems 3°-5° long. 



A. rusocarpa, Michx. Stem tall ; leaves ovate-lanceolate, acuminate ; 

 fertile flowers crowded in a continuous spike ; utricle fleshy, more than twice 

 as long as the bracts, tlie angles often punctate-rugose ; stigma ratlier short, 

 slender-subulate. — Salt marshes, Georgia, and northward. — Stem 3° -6° 

 high. 



A. cannabina, L. Stem and leaves as in the preceding : fertile spikes 

 less densely flowered; utricle less fleshy, smooth, sharply angled, much 

 longer than the linear-subulate bracts ; stigma very long and hairy. — 

 Brackish marslies and river-banks, Georgia, and nortliward. 



Oedee POLYGONACE^. 



POLYGONUM, L. 



P. Hydropiper, Ii. (Common Smaetweed.) Annual, smooth ; leaves 

 lanceolate, punctate, acrid ; spikes slender, interrupted, nodding ; flowers 

 greenish; stamens 6; style 2-8-parted; acheniumflat or triangular. — Road- 

 sides, Northern Georgia, and northward. — Stem l°-2° high. 



Okdee PIPERACE.^. 



Chiefly like Saururacese, but with a simple one-celled ovary containing a 

 single erect ovule. — Herbs or shrubs. 



PEPEROMIA, Kuiz&Pavon. 



Bracts free. Flowers liermaphrodite. Stamens 2, lateral; anthers 2- 

 valved, extrorse. Stigma solitary. 



P. magnolisefolia, C. DC. Leaves mostly alternate, rigid, petioled, 

 obovate, pellucid-punctate ; spikes terminal, densely flowered, longer than 

 the leaves ; peduncles as long as the petiole ; bracts rounded, peltate. — East 

 Florida ( Garber). — Leaves IJ' - 3' long. 



P. leptostachya. Leaves opposite or whorled, very thin, smaller (1' or 

 less long), 3-nerved ; spikes very slender, rather loosely flowered ; otherwise 

 much like the preceding. (Piper leptostachyon, Nuti. ) — Islands at the mouth 

 of the St. John's ( Cwtiss). 



Oedee CALLITRICHACE^. 



CALLITRICHE, L. 



C. peploides, Nutt. Annual; stems creeping; leaves uniform, obovate 

 or spatulate; fruit nearly sessile, circular, notched at the apex, the sidea 



