POLEMONIACEAE. 295 



Polemonium micranthum Benth. Annual, branched from the base, 

 spreading, 6-20 cm. high, somewhat viscidly pubescent throughout; leaves 

 mostly petioled, 1-4 cm. long; leaflets 5-13, obovatc or lanceolate, acute or 

 obtuse, 3-8 mm. long; peduncles solitary, opposite the leaves; calyx-lobes 

 triangular, as long as the broadly campanulate tube; corolla white, rotate, 

 not equalling the calyx; ovules 2 or 3 in each cell. 

 [In dry open places, rare in our limits. 



Polemonium elegans Greene. Perennial, viscid-pubescent; stem 5-12 cm. 

 high; leaflets numerous, crowded, obovate or elliptical, 2-4 mm. long; flowers 

 in*a dense cyme; corolla violet, with a broad yellow throat. 

 'Cascade Mountains at 2000-3000 m. elevation. 



Polemonium viscosum pilosum Greenman. Perennial, pilose-pubescent 

 and somewhat viscid-glandular; stems 6-10 cm. high; leaflets numerous, 

 moderately crowded, thickish, ovate, 2-3 rnm. long; calyx campanulate, the 

 lobes oblong-ovate to oblong, obtuse; corolla white or pale blue with a yellow 

 center, 8-10 mm. long; filaments naked at base. 



Goat Mountains, Washington, Alleti. 



Polemonium humile R. & S. Perennial, loosely tufted, viscid-puberulent; 

 stems 15-30 cm. high, bearing 1-3 leaves; leaflets 15-21, oblong-lanceolate 

 to oval, 10-15 mm. long; flowers blue, in open cymes; calyx-lobes triangular, 

 about as long as the tube; corolla canipanulate-funnelform, the broad rounded 

 lobes longer than the tube; filaments hairy at base; capsule 2-4-seeded. 



The plant has an unpleasant odor. At about the limit of trees in the moun- 

 tains, common. 



Polemonium cameum Gray. Perennial, nearly glabrous; stems ascending 

 or erect, 15-60 cm. high, leafy; leaflets 11-21, lanceolate to oblong-ovate, 

 acute, 1-5 cm. long; cymes few-flowered; calyx campanulate, 1-2 cm. long, more 

 or less pubescent, the narrow acute lobes about twice as long as the tube; 

 corolla salmon-colored or blue, the rounded lobes longer than the tube; fila- 

 ments dilated and pilose at base; seeds 2-4 in each cell. 



Chehalis County, Washington, to middle California. As here delimited the 

 species is quite variable in regard to the number and size of the leaflets, the 

 amount of pubescence on the calyx, and especially the color of the corolla 

 which in the original specimen is flesh-colored. P. amoenum Piper seems only 

 a blue-flowered form, and P. liiteum Howell is probably only a yellow-flowered 

 variety. 



408. NAVARRETIA. 



Glabrous or viscid-pubescent annual herbs; leaves all alternate, 

 pinnatifid, setaceous or spiny; flowers crowded in bracteate 

 clusters on the ends of the branches; calyx-tube scarious, not 

 becoming distended and not burst by the capsule, the ribs 

 prolonged into unequal bristle-tipped lobes; corolla tubular; 

 capsule 1-3-celled, 1-many-seeded. 



Herbage glandular-viscid with a bad odor. N. squarrosa. 



Herbage neither glandular nor with a bad odor. N. intertexta. 



Navarretia squarrosa (Esch.) Hook. & Arn. Skunk Weed. Annual, gland- 

 ular, erect or spreading, simple or much branched, 10-30 cm. high, very leafy; 

 leaves mostly alternate, pinnately parted and the segments cleft or parted, 

 the lobes sharp pointed, the upper ones and the bracts becoming spine-like; 

 calyx-lobes subulate, spiny-tipped, usually entire, longer than the tube; corolla 



