450 POLEMONIACE^ phlox 



of the salverform corolla. 



* * Leaves palmately 3-7-parted, the divisions rigid and pungent : 

 seeds not mucilaginous when wet. 



2 Cantua Woody-stemmed, at least at base : flowers solitary and sessile, 



or few in a cluster at the summit of short branches or branchlets. 



* * * Leaves mostly alternate and entire : seeds mucilaginous and 

 throwing out spiral threads when wet. 



3 Collomia Stamens unequally inserted in or below the throat of the 



funnelform or salverform corolla: filaments slender, often exserted. 



* * * * Leaves various : seeds almost always mucilaginous when 

 wet. 



■*- Leaves either opposite or palmately divided to the sessile base, 

 usually both : seed-coat mucilaginous when wetted but destitute of 

 spiral threads. 



4 Linanthus Low glabrous annuals with opposite leaves. 



+- +- Leaves alternate and pinnately incised cleft or divided, rarely 

 entire : seed coat mucilaginous and sending out spiral threads when wet. 



5 Navarretia Low and much branched annuals, not floccose-woolly, 



mostly glandular and viscid : flowers capitate-crowded and densely 

 foliaceous-bracted : lobes of the calyx rigid and acerose-pungent or 

 spinulose : corolla tubular-funnelform. 



6 Hugelia Floccose-woolly annuals, neither glandular nor viscid : flow- 



ers capitate-glomerate and foliaceous-bracted ; lobes of the calyx acerose 

 or subulate and cuspidate or pungent. 



7 Ipomopsis Biennials : not woolly : flowers thyrsoid paniculate : lobes 



of the calyx subulate : corolla narrowly tubular-funnelform. 



8 Gilia Flowers scattered, crowded, or capitate-glomerate: corolla from 



funnelform to nearly rotate. 



9 Polemonium Mostly smooth perennials with pinnate leaves and 



thyrsiform or cymulose-paniculate inflorescence: lobes of the calyx 

 foliaceous, enlarging in fruit. 



PHLOX L. Gen. n. 214. 



Herbs or siiffrutescent plants with opposite entire leaves, and 

 showy red, white or blue flowers in terminal cymes or cymose 

 panicles. Calyx tubular or tubular-campanulate, 5-cleft and 

 5-ribbed. the lobes acute or acuminate, mostly scarious-margined 

 and the sinuses commonly scarious, not enlarging in fruit but 

 often bursting when the seeds mature. Corolla strictly salver- 

 form, with slender tube and narrow orifice, the limb 5-lobed. 

 Stamens 5, straight, inserted irregularly on the tube of the corolla; 

 filaments very short; anthers not exserted. Ovary oblong or 

 ovoid, 3-celled; with 1-4 ovules in each cell. Capsule ovoid, 

 3-valved. Seeds not mucilaginous nor emitting spiral threads 

 when wet. Ours all belong to a peculiar section that is 



feuffruticulose or suffrutescent, rarely herbaceous to the ground ; 

 chiefly with narrow or minute and thick-margined leaves, and 

 one-flowered branchlets or peduncles. 



