POLEMONIACEAE. 293 



Calyx not distended nor burst by the capsule. 



Corolla rotate (in ours) ; leaves pinnate, the leaf- 

 lets entire. 407. Polemonium, 294. 

 Corolla not rotate. 



Calyx-lobes spine-tipped; leaves pinnatifid. 408. Navarretia, 294. 

 Calyx-lobes not spine-tipped; leaves entire or 

 pinnatifid. 409. Collomia, 296. 



40S. PHLOX. 



Perennial herbs or half shrubby plants ; leaves opposite, sessile, 

 entire; flowers in cymes, terminal or in the upper axils, mostly 

 bracted; calyx narrow, 5-cleft, at length distended and burst by 

 the capsule ; corolla salverform with a long tube, a narrow opening 

 and broad or rounded lobes; stamens included, very unequally 

 inserted on the upper part of the corolla- tube ; ovules 1 or some- 

 times 2; capsules ovoid, with but one seed in each cell. 



Loosely tufted, the leaves not crowded; flowers in cymes. P. adsurgens. 

 Densely tufted with crowded leaves; flowers solitary. 



Calyx woolly; leaves not ciliate. P. diffusa. 



Calyx glabrous; leaves hispid-ciliate. P. condensata. 



Phlox adsurgens Torr. Glabrous except the inflorescence; stems spreading 

 or ascending, 15-40 cm. high; leaves ovate-lanceolate to ovate, acute, 1-2 cm. 

 long; calyx scarious between the angles, glandular-pubescent, the teeth 

 shorter than the tube; corolla pink, its tube twice as long as the calyx, its lobes 

 ovate, sometimes retuse. 



In open woods, western Oregon, perhaps not in our limits. 



Phlox diffusa Hook. Stems prostrate; leaves clustered, linear, sharp- 

 pointed, glabrous, 6-12 mm. long; calyx-teeth as long as the tube; corolla pale 

 violet or nearly white, the obovate lobes 6-9 mm. long. 



In the mountains, above timber line, often forming large mats. 



Phlox condensata (Gray) E. Nelson. Minutely glandular, densely tufted; 

 leaves much crowded, oblong-linear, rigid, longitudinally grooved, ciliate- 

 margined, 5-6 mm. long; calyx 5 mm long, its teeth linear, apiculate; corolla 

 white, the tube nearly twice the calyx, the rounded lobes 4-5 mm. long; 

 style short. 



Olympic and Cascade Mountains at high altitudes, growing on rocks. 



406. GILIA. 



Herbs or half-shrubby plants; leaves alternate or opposite; 

 calyx narrow, the lobes acute, the tube scarious below the sinuses, 

 becoming distended and finally burst by the capsule; corolla 

 tubular-funnelform, the limb little spreading (in ours); stamens 

 equally or unequally inserted; capsules with 1-many seeds. 



Perennials. ^"* nuttallii. 



Annuals. 



Leaves or some of them opposite. 



Leaves all opposite, dissected into filiform segments. G. bicolor. 

 Lower leaves opposite, the upper alternate, all entire. G. gracilis. 

 Leaves all alternate. 



Calyx glabrous; corolla 8-10 mm. long. G. capitata. 



Calyx woolly; corolla 10-12 mm. long. G. achilleaefolia. 



