NORTH AMERICAN GERANIACEAE. 73 



East of the Rocky mountains; calyx only moderately villous; pedicels canes- 

 cent. ........... G. maculatu7n. 



Northwestern; calyx and usually pedicels very villous. . . Q. erianthum. 



Petals more or less villous within; at least the i^edicels conspicuously glandular. 

 Stout; flowers purple; glandular hairs rather short, dirty yellow; tip of beak short 

 and thick. ........... Q. incisum. 



Slenderer; flowers mostly white; hairs long and white, tipped with purple glands; 

 tip of beak longer and slenderer. . . . . . . G. liichardsonii. 



More or less spreading and cespitose; leaves of medium size, 30-75 mm. 

 Upper leaves mostly as broad as long, with equal cuneate lobes. 



Pedicels, etc., mostly glandular; filaments mostly about equalling the pistil. 



G. Fremontii. 



Usually retrorsely canescent and not glandular; filaments a third longer than the 

 pistil. .......... G. caesjjitosum. 



Upper leaves longer than broad, the terminal lobe longest, ovate-lanceolate. 



G. Ilernandezii. 



* *Annual or biennial; leaves seldom over 50mm.; flowers smaller, 4— 15mm.; seeds 

 smooth, reticulate, or pitted. 

 Carpels not bristle-bearing above; leaves radiately lobed or mostly dissected. 



Peduncles mostly 1-flowered; leaves 3-cleft, with sen-ate divisions. . G. Sihiricum. 



Peduncles 2-flowered; leaves several lobed. 



Peduncles and pedicels long and slender; carpels subglabrous, not wrinkled; seeds 

 deeply pitted. ......... G. columhinum. 



Peduncles and pedicels mostly short; carpels hairy or rugose. 

 Seed reticulate or pitted. 



Pubescent or short-glandular. 



Coarse; branches uniformly leafy; lobes of leaves rather broad and short; 

 seed very low-ridged except in the variety. . . G. Carolinianum. 



Slenderer; leaves crowded at the ends of the branches, their lolies long and 

 narrow ; seed deeply pitted. ..... G. dissectum. 



Glandular-villous with purple-tipped white hairs; leaves shallow-lobed ; seed 

 reticulate-ridged. ....... G. rotundifolium. 



Seed neither pitted nor conspicuously reticulate. 



Carpels finely appressed-pubescent, not wrinkled; flowers pale; stamens five. 



G. 2iusillum. 



Carpels subglabrous, transversely rugose; flowers deep purple; stamens ten. 



G. molle. 



Carpels bristle-appendaged at the upper end, strongly wrinkled; leaves 

 1-2-ternately divided; very graveolent. . . . G. Bohertiamim. 



