Umbellifebje. (parsley family.) 159 



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



crenate ; umbels globose, on peduncles commonly longer than the petioles ; 

 frait 2-ribbed on each side. — Wet places, Florida to Mississippi, and northward. 

 May. — Leaves l'«wide. 



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

 3 - 5-lobed ; umbels few-flowered, on peduncles much shorter than the petioles, 

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

 Florida to North Carolina, and westward. May and June. — Petioles G'-12' 

 long. Peduncles 1' long. 



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

 timbels proliferous, the nearly sessile clusters forming an interrupted spike ; fruit 

 strongly ribbed. — Wet places, Florida to Mississippi, and northward. 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, Florida to 

 North Carolina, and westward. July. 



2. CRANTZIA, Nutt. 



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

 the lateral ribs thickened and corky. Vittse 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, Florida to Mississippi, and northward. July. — Leaves 1' long, with 

 cross partitions, narrowed towards the base, obtuse. Involucre 5 - 6-leaved. 



3. SANICTJLA, Tourn. 



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

 prickles ; the carpels not separating spontaneously, each with 5 vittas. — Peren- 

 nial erect branching herbs, with palmately-divided long-petioled leaves, and 

 polygamous flowers in small heads, disposed in a loose expanding cvme. 



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, Georgia, and northward. 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 1° - 2° high. Branches of the 

 cyme long and spreading. 



4. ERYNG-IUM, Tourn. Button-Snakeroot. 



Calyx 5-toothed, persistent. Styles slender. Fruit turbinate, covered with 

 scales or tubercles, without ribs or vittas. — Herbs, with spiny or bristly mostly 



