CALLITRICIIACEjE. 645 



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

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



A. l'USOCarpa, Michx. Stem tall; leaves ovate lanceolate, acuminate ; 

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

 as long as the bracts, tiie angles often punctate-rugose; stigma rather short, 

 slender-subulate. — Salt marshes, Georgia, and northward. — Stem o°-b° 

 high. 



A. carmabina, 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 marshes and river-banks, Georgia, and northward. 



Order POLYGOXACE.E. 



POLYGONUM, L. 



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

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

 greenish; stamens 0; style 2-3-parted; achenium flat or triangular. — Road- 

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



Order PIPERACE^E. 



Chiefly like Saururacere, 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, extrorse. Stigma solitary. 



P. magnolise folia, 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 H'- 3' long. 



P. leptOStachya. Leaves opposite or whorled, very thin, smaller (l'or 

 ig), o-nerved ; spikes very slender, rather loosely flowered; otherwise 

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

 of 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 



