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 tiie bracts, tlie angles often punctate-rugose ; stigma rather short, 

 slender-subulate. — Salt marslies, 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 A-^ery long and hairy. — 

 Brackish marshes and river-banks, Georgia, and northward. 



Order POLYGONACE^. 



POLYGONUM, L. 



P. Hydropiper, L. (Common Smartweed.) Annual, smooth ; leaves 

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

 greenish ; stamens 6 ; style 2- 3-parted ; acheniuni flat or triangular. — Road- 

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



Order PIPERACE^. 



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

 single erect ovule. — Herbs or shrubs. 



PEPEROMIA, Ruiz & Pavon. 



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

 valved, e.xtrorse. Stigma solitary. 



P. magnoliaefolia, 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 1^' -3' long. 



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

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

 nmch like the preceding. (Piper leptostachy on, iVu«.) — Islands at the mouth 

 (if the St. John's (Curtiss). 



Order CALLITRICHACE^E. 



CALLITRICHE, L. 



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

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



