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. 



405. 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. G. 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. achilleaefoUa. 



