242 HTDROPHYLLACEAE 



Racemes more or less divergent (especially at maturity), solitary or gemi- 

 nate, not separated from the foliage; corolla with spreading 

 lobes ; stamens included or exserted ; f ruitmg capsules ascending. 

 Perennial with woody root-crown ; corolla-scales long, with a small 

 lateral lobe; widely distributed, both cismontane and trans- 

 montane 21. P. ramosissima. 



Annuals. 



Leaves with the leaflets or divisions (at least the lower) petiolu- 



late; rare, sw. Colorado Desert 22. P. umbrosa. 



Leaves with the divisions sessile. 



Calyx-lobes oblanceolate or lanceolate or oblong (usually one 

 of the 5 obtuse), puberulent and hispid; corolla- 

 scales short with a large lateral lobe ; stems puberu- 

 lent and hirsute ; common and widely distributed, 

 both cismontane and transmontane....23. P. distans. 

 Calyx-lobes mostly narrower and acute, puberulent and 

 Ijristly, the bristles equal and regular, spreading 

 horizontally ; corolla-scales long, without a lateral 

 lobe ; stems puberulent and hispid ; e. Mohave Desert 



and Inyo Co 24. P. vallis-mortae. 



Hairs of ovary and capsule of 2 kinds, a short minute pubescence mixed with 

 more or less conspicuous bristles usually arising from dark spots; 

 fruiting pedicels fragile (except in P. cicutaria var. heliophila) ; calyx 

 and herbage markedly spreading-bristly; calyx-lobes very narrow; 

 stamens included or little exserted. 

 Corolla 4 to 7 lines wide, longer than the calyx; fruiting pedicels % to 1 

 line long ; stamens about equaling corolla or a little exserted ; 



Sierra Nevada foothills, inner South Coast Range and S. Cal 



25. P. cicuiaria. 



Corolla 2 to 2% lines wide, shorter than or equaling the calyx; fruiting 



pedicels 1M> to 2% lines long; stamens included; transmontaue 



deserts 2(3. P. cryptantha. 



Calyx-lobes broadly ovate to oblong, in fruit becoming chartaceous or firm. 



Corolla bowl-shaped, much surpassing calyx ; stamens equaling corolla ; style 

 long-exserted from fruiting calyx; cismontane Cal. and w. Mohave 



Desert 27. P. ciliata. 



Corolla tubular, hardly surpassing calyx; stamens included; style short, in- 

 cluded in fruiting calyx ; ne. Cal 28. P. thermalis. 



Divisions of leaves large (mostly 1 to 2% inches broad), mostly with petiolules; pedicels dur- 

 ing anthesis 1 to 3 lines long, densely and regularly hirsute with long spreading 



hairs; stamens exserted; transmontaue deserts 29. P. pedicellata. 



Leaves merely toothed, lobed or cleft, not divided or seldom (except in P. crenulata). 



Leaf -blades oblong to linear-oblong (or ovate), irregularly toothed or lobed, or some pin- 

 nately divided (at least below) ; calyx -lobes equal in length; stamens well-exserted ; 



herbage hirsutulose or hirsute-hispid ; transmontaue deserts 30. P. crenulata. 



Leaf -blades round- or elliptic-ovate, shaUowly lobed; calyx-lobes unequal; herbage bristly; 

 Coast Ranges. 



Racemes dense, many-flowered; stamens and style exserted 31. P. malvaefolia. 



Racemes slender, becoming loose, fewer-flowered; stamens and style included 



32. P. rattanii. 



b. Ovules several to many to each placenta. 



Calyx -lobes dorsally concave or with revolute margins; leaves bipinnately parted or divided; 

 racemes congested in a terminal cymose panicle; plants robust (1 to 2 feet high) ; Santa 



Catalina and San Clemente islands 33. P. lyonii. 



Calyx-lobes plane, not revolute; racemes not densely congested; plants 2 to 12 inches high (to 1% 

 feet in P. linearis). 

 Pedicels curved or retrocurved-spreading in age. 



Leaf -blades mostly pinnately parted or some subentire ; style cleft at apex ; cismontane 



from cent. Cal. to S. Cal 34. P. donglasii. 



Leaf -blades mainly entire (or the basal few-toothed or incised) ; style cleft % to % ; 



transmontaue, and also intramontane in ranges bordering the deserts 



35. P. curvipes. 

 Pedicels straight, short during anthesis (% to 1% lines) ; leaves merely toothed or cleft or 

 entire, sometimes parted or divided towards the base. 

 Leaves cordate or subcordate at base, at least the lower, the upper often broadly cuneate 

 at base ; Inyo Co. and e. Mohave Desert. 



