238 FLOBA OF PHILADELPHIA. 



Umbels, at least some of them, proliferous; pedicels, or some of them, 

 short. 



Fruit notched at each end. 2. H. Canbyi. 



Fruit not notched at either end. 3. H. verticillata. 

 Leaves nearly orbicular, cordate, or reniform, not peltate. 



Leaves 5-13-lobed; umbels nearly sessile. 4. H. Americana. 



Leaves 3-7-cleft; umbels long-peduncled. 5. H. ranunculoides. 



1. Hydbocotyle umbellata L. M. p. 671. Swamps and low grounds. 



Summer. 



2. Hydrocotyle Canbyi C. & K. M. p. 671. Moist ground. Summer. 



^wcAs— Neshaminy Creek near Doylestown (Br.). 



Cumberland — Low grounds near Delaware Bay (C). Cape Moy— Cape 

 May (Ja.). 



New Castle — Collins ' Beach, Commons. 



3. Hydrocotyle verticillata Thunb. M. p. 671. Moist soil. Summer. 



Cape May — Cape May (Cr.), Wildwood (He.) (Li.). Monmouth — 

 Redbank (C), Deal, Dr. Geo. Smith (Fu.). 

 4^ Hydrocotyle Americana L. M. p. 672. Wet places. Summer. 

 5. Hydrocotyle ranunculoides L. f. M. p. 672. Ponds and swamps. 

 Summer. 

 Chester— (F.). Lancaster— York Furnace (Or.) (He.) (Li.), Peach 

 Bottom ( Pr. ) . Dauphin — ( P. ) . 



2. SANICULA L. Snake-koot. 



Perennial; some staminate flowers in separate heads; styles longer than the 



bristles. 

 Petals and anthers greenish-white; calyx-segments lanceolate, cuspidate; 



fruit 6 mm. long. 1. S. Marylandica. 



Petals and anthers yellow; calyx-lobes ovate, obtuse; fruit 3 mm. long 



or less. 2. S. gregaria. 



Biennial; staminate flowers never in separate heads; styles shorter than the 



bristles. 

 Leaves 3-5-divided; pedicels of staminate flowers 2 mm. long; fruit less 



than 4 mm. long. 3. S. Canadensis. 



Leaves 3-foliolate; pedicels of staminate flowers 4 mm. long; fruit 6 



mm. long or more. 4. S. trifoliata. 



1. Sanicula Marylandica L. Sanicle, Black Snake-root. M. p. 672. Rich 



woods. Early summer. 



2. Sanicula gregaria Bicknell. M. p. 673. Woods and thickets. Spring. 



3. Sanicula Canadensis L. M. p. 673. Woodlands. Summer. 



4. Sanicula trifoliata Bicknell. M. p. 673. Hilly woods. Early summer. 



3. ERYNGIUM L. Eryngo. 



Leaves elongated-linear, parallel-veined. 1. E. aquaticum. 



Leaves elongated-linear, reticulate-veined. 2. E. Virgin i.a7ium. 



1. Eryngium aquaticum L. Battlesnake-Master. M. p. 673. Wet soiL 



Summer. 

 Burlington — Bet-ween Atsion and Quaker Bridge (C). 



2. Eryngium Virginianum Lam. Eryngo. M. p. 673. Marshes along the 



coast. Summer. 



