WOOTON AND STANDLEY FLORA OF NEW MEXICO. 421 



Pubescence loose and coarse, yellowish or at least 

 not white; plants not whitish; leaves pinna- 

 tifid or merely toothed or lobed. 

 Leaves pinnatifid, the terminal portion con- 

 spicuously lobed; pedicels long, slen- 

 der 6. S. jnimila. 



Leaves eubhastate, the terminal lobe not lobed; 

 pedicels various. 

 Pedicels very short and stout; pubescence 

 coarse, tawny; leaves more or less 



lobed 7. S. suhhastaia. 



Pedicels long and slender; pubescence fine 

 and close, grayish: leaves often lan- 

 ceolate and not at all lobed S. <9. arenana. 



Fndt little or not at all depressed, the carpels with 2 or 3 ovules 

 and 1 or 2 seeds, usually oblong, after separation from the 

 axis cohering with each other by their sides and held by 

 a short thread. 



Carpels smooth at the base or nearly so 0. S. leiocarpa. 



Carpels strongly reticulated at the base. 



Leaves narrowly oblong, or lanceolate and subhastate; 

 plants tall and stout. 



Leaves narrowly oblong, not lobed 10. S. cuspidata. 



Leaves lanceolate, subhastate, with 2 low rounded 



lobes at the base, broader 11. S. lobata. 



Leaves round-ovate or rhombic-ovate in outline, often 



pinnatifid or variously lobed; plants mostly 



lower and more slender. 



Pubescence fine and very dense, almost velvety 



(yellowish); lobes of the leaves usually 



round-ovate; flowers usually very numerous 



and dense 12. S. incana. 



Pubescence coarse and loose; lobes of the leaves 

 usually narrower, mostly acutish; flowers 

 few or numerous. 

 Leaves divided into 3 almost equal rounded- 

 oblong entire lobes, the lateral lobes di- 

 vergent Vi. S. tripartita. 



Leaves not equally 3-parted, the lobes toothed 

 and the lateral ones not divergent. 

 Pubescence yellowish, the whole plant 



green, not grayish 14. S.fendleri. 



Pubescence white, giving the plants a 



grayish appearance. 



Leaves broadly cordate-ovate, mostly 



simple; petioles usually longer 



than the blades; pedicels short 



and comparatively stout 15. S. ribi/olia. 



Leaves deeply 3-lobed; petioles 

 shorter than the blades; pedi- 

 cels very long and slender 16. S. laxa. 



