POLEMONIACBA 81 



Simple or sparingly branched: flowers sessile in dense leafy-bracted heads: coiolU salver- 

 form 



Corolla-tube little or not at all exserted beyond the leafy bracts. 11, 16, 16 



Corolla tube much exserted 12, 13, 14 



* * Leaves aliemate, lohed or parted; rardy a few entire or oppoiile. 

 f Leatet palmately parted into rigid pungent divisions: stems woody: fiuwert large, sessile: 



corolla salverform: stamens included 17, 18 



tt Leaves pedately 6-7-parted: so/t-hairy perennials. 



Flowers white in dense beads: some leaves 3-parted or entire - . . 34 



Flowen violet or purplish, solitary, subsessile in forks or axils 35 



tf f Leaves pinnately incised cleft or divided, rarely a few entire or opposite: bracts some- 

 times nearly palmately cleft, 

 a. FUmers in dense leafy-hracted clusters or heads: lobes oj the calyx, bracts and upper 



leaves mostly rigid and pungent. 

 Much branched annuals: sometimes viscid: never woolly except in the heads^8tigIQa»of ten 

 only 2. 

 At least some of the leaves bipinnatifid. 



More or less viscid; odor disagreeable 19, 20 



Not viscid: leaf -segments filiform 81 to 24 



Leaves simply pinnatifid or many entire. 



Not viscid; bracts and calyx fine-woolly 25 



Viscid 26 to 28 



Densely woolly, at least when young: corolla salverform: stamens exserted. 



Leaves rigid, not viscid: filaments exserted; anthers sagittate 29 to 33 



Leaves not rigid: petioles broad: flowers small, white, numerous. ... ^ 34 



b. Injlorescence bractleas or nearly so: leaves not rigid or pungent. 



Stems from creeping rootstocks, 1 or 2 ineher high 35 



flowers ia long-peduncnlate ovoid heads: leaf -lobes filiform 36, 37 



Flowers clustered or solitary: leaf-lobes slender (except 41) 88 to 44 



Corolla pinkish, slender, twice as long as calyx 45, 46 



* * ' Leaves entire (rarely S or S smtdl lobes), alternate, or the lower opposite, sessile: coroUa 

 salverjorm to funnt\form: stamen unequally inserted: mxrre or less viscid annuals. 



Flowers on filiform peduncles: corolla pink, 5 to 10 lines long. 47 



Flowers in loose cluster or scattered: calyx -lobes slender ......,...,, 48 



Flowers in the forks and upper axils: calyx-lobes awn-like 49 



Flowers in leafy -bracted capitate clusters or a few scattered. 



Calyx-lobes acute: coroUa 5 lines long ,»,..., . 50 



Calyx-lobes obtuse: corolla 10 to ISlines long _„^»», , 61 



§ 1. Dactylopliylliiin, Gray. 



1. O. Uniflora, Benth. Corolla white or pinkish, nearly rotate. W. CaL 



n 



