184 POLEMONIACEAE (PHLOX FAMILY) 



A. Leaves i-pinnatifid or -incised, or many leaves entire. 



B. Stem not viscid, slender, 2.5-15 cm. high; leaves all slender and filiform except 

 the bracts of the head. E. N. divaricata 



BB. Stem very viscid, stout, rigid, 15-18 cm. high; leaves of the stem mostly la- 

 ciniate-pinnatifid. U. N. atractyloides 



AA. Some of the leaves and bracts more than i-pinnatifid or -incised. 



C. Plant with skunklike odor, glandular-viscid. W. W- squarrosa (skunkweed) 

 CC. Plant without skunklike odor, not glandular, not viscid (except N. breweri). 



D. Corolla yellow; plant somewhat glandular-viscid. U. E. N. breweri 



DD. Corolla white or blue; plant not glandular-viscid. 

 E. Corolla pale blue; leaf-divisions all spinose. U. N. stricta 



EE. Corolla white. 

 F. Stem glabrous or glabrate except at the very top; ovules 1-3 in each cell. 

 G. Plant 2.5-7.5 cm. high; bracts of the head with spinose lobes. C. 



N. minima 



GG. Plant 10-25 cm. high; bracts of the head with barely sharp-pointed lobes, 



U. N. leucocephala 



FF. Stem puberulent or pubescent. 



H. Ovules 3-4 in each cell; stem pubescent; calyx tube and base of bracts very 



hairy. E. N. intertexta 



HH. Ovule I in each cell; stem puberulent; calyx tube and bracts sparsely 



hairy. E. " N. klickitatensis 



COLLOMIA (Collomia) 



Herbs. Flowers white or yellow or purple. Calyx obpyramidal, scarious 

 in the sinuses ; lobes erect, entire. — (Gk. kolla = glue ; referring to the 

 glutinous seeds when wet.) 



A. Leaves or at least the lower ones more or less dissected. 

 B. Calyx lobes triangular- to ovate-lanceolate. 



C. Leaves pinnately veined; annual. W. C. C. heterophylla 

 CC. Leaves palmately veined; perennial. C. C. debilis 



BB. Calyx lobes subulate; perennial. 



D. Stems loosely branching, often more than one from the same root; inflorescence 

 loose. U. C. glutinosa 



DD, Stems usually simple but mostly several from the same root; inflorescence 



dense, headlike, C. C. mazama 

 AA, Leaves entire or at most merely serrate. 



E. Flowers solitary in the axils, E. C. tenella 

 EE. Flowers in clusters, 

 F, Corolla pink, i cm. long, 



G. Calyx lobes aristate; flowers few in a cluster. C. E. 0. aristella 



GG. Calyx lobes acute; flowers many in a cluster. E. C. linearis 



FF. Corolla salmon-colored, 2-3 cm. long. W. C. E. C. grandiflora 



POLEMONIUM (Greek Valerian) 



Herbs. Flowers clustered. Calyx not angled, not ribbed, campanulate 

 or narrower, cleft to the middle; lobes equal, erect to spreading. Corolla 

 regular, — (Gk. polemos — war; it is said that two kings fought over the 

 honor of the discovery of the medicinal uses.) 



A. Corolla yellow, 16-20 mm. long, its lobes 3-4 times as long as its tube; plant 1.5- 

 4.5 dm. high. C. P. luteum 



