KEY, 161 



or corymbs, consisting of little umbel-like clusters, white. 

 Shrubby plants. Ceanothus. 



II. Ovary 2 celled, 2-carpelled 289 



III. Ovary 1 -celled, with 2 parietal, many-seeded 

 placentae, 2 -beaked. Calyx bell-shaped, the tube cohering at 

 the base only with the ovary. Petals spatulate. Leaves 

 chiefly radical, round -hcai-t-shaped and lobed. 



(181) Heuchera. 



S89, Seeds several. Calyx-tube top-shaped, cohering 

 with the 2-carpelled, 2-beaked jjod. Leaves palmately 5- to 

 7-lobed, or cut,petioled, alternate. Flowers white, in cymes. 

 Stem glandular, 6-20 inches high. 



Boykinia aconitifolia, Nutt. 

 Seeds 2 only, jiamely, 1 in each carpel 290 



UMBELWORTS. 



390. Inner face of each seed flat, or nearly so, not 



hollowed out 291 



Inner face of each seed hollowed out, cither 

 lengthwise or only in the middle. Flowers white 311 



391 • I. Flowers in simple umbels, sometimes spicate. 



Leaves simple. Calyx-teeth obsolete 292 



II. Flowers in capitate umbels — that is, sessile, and 



forming dense heads 293 



III. Flowers in regularly compound umbels, not 

 sessile in heads 294 



393. Fruit flat, orbicular. Marsh herbs, with round- 

 peltate or kidney-shaped leaves. Calyx-teetli obsolete. 



Hydrocotyle. 



Fruit globular. Proper leaves none; in their place 

 fleshy, hollow, cylindrical or awl-shaped petioles, marked 

 witli cross-divisions. Calyx-teeth obsolete. 



Crantzia lineata, Nutt. 



393. Flowers partly sterile. Fruits globular, thickly 

 clothed with hooked prickles, few in a head. Leaves 3- to 5-, 

 or 5- to 7-parted. Sanicula. 



