UMBELLIFER^, (PARSLEY FAMILY.) 175 



1. H. Americana, L. Smooth; leaves orhicular-renifoi-m, crenately 

 7-lobed; umbels sessile, 3 -5-flo\vered ; fruit 2-ribbed. — Mouutaius of North 

 Carolina. July. — Stems stoloniferous. Leaves very thin, glossy. 



2. H. umbellata, L. Smooth; leaves orbicular, peltate, obscurely 

 lobed, creuate ; umbels globose, on peduncles commonly longer tlian the peti- 

 oles ; fruit 2-ribbed on each side. — Wet places. May. — Leaves I' wide. 



3. H. ranunculoides, L. Smooth; leaves orbicular-reniform, cre- 

 nately 3-. 5-1 ol)ed ; umbels few-flowered, on peduncles much shorter than the 

 petioles, mostly nodding in fruit ; fruit obscurely ribbed. — Springs and 

 muddy places. May- June. — Petioles 6'- 12' long. Peduncles V long. 



4. H. interrupta, Muhl. Smooth ; leaves orbicular, peltate, crenate ; 

 umbels proliferous, the nearly sessile clusters forming an interrupted spike; 

 fruit strongly ribbed. — Wet places. June. — Petioles longer than the 

 peduncles. 



5. H. repanda, Pers. Pubescent ; leaves broadly ovate, truncate or 

 slightly cordate at the base, glandular-serrate ; umbels capitate, few-flowered, 

 shorter than the petioles ; fruit strongly ribbed. — Low grounds. July. 



2. CRANTZIA, Nutt. 



Calyx teeth obsolete. Petals roundish. Fruit globular. Carpels 5-ribLed, 

 tlie lateral ribs thickened and corky. Vittae single in the intervals, with 2 on 

 the commissure. — Small creeping marsh herbs, with fleshy linear leaves, and 

 small whitish flowers in axillary umbels. 



1. C. lineata, Nutt. (Hydrocotyle lineata, Michx.) — Muddy banks, 

 near the coast. July. — Leaves 1' long, with cross partitions, narrowed to- 

 wards the base, obtuse. Involucre 5 - 6-leaved. 



3. SANICULA, Tourn. 



Calyx 5-toothed, persistent. Fruit globose, without ribs, armed with 

 hooked prickles ; the carpels not separating spontaneously, each with 5 vittse. 

 — Perennial erect branching herbs, with palmately divided long-petioled 

 leaves, and polygamous flowers in small heads, disposed in a loose expanding 

 cyme. 



1. S. Marilandica, L. Leaves .5-7-parted, the divisions lobed and 

 toothed ; heads many-flowered ; sterile flowers numerous on slender pedicels ; 

 styles long, recurved. — Dry woods. May. — Stem 2"^ -3° high. 



2. S. Canadensis, L. Leaves 3-5-parted, the divisions lobed and 

 toothed; heads few-flowered ; the sterile flowers (1-3) nearly sessile; styles 

 short and straight. — Dry woods, common. May. — Stem l°-2° high. 

 Branches of the cjiae long and .spreading. 



4. ERYNGIUM, Tourn. Button Snakeroot. 



Calyx 5-lobed. Styles long and slender. Fruit short, turbinate, granulate 

 or scaly, tne ribs obsolete. VittiB 5, 2 dorsal and 3 on the commissure. — 

 Smootn herbs. Leaves often with cartilaginous margins, and spiny serra- 



