200 POLEMONIACEAE. 



Gilia harknessii Curran. Annual; very slender, simple or branched above, 

 5-15 cm. high, glabrous; leaves sessile, all palmately parted into 3-9 thread- 

 like lobes, 5-10 mm. long, all opposite; flowers on slender spreading pedicels, 

 1-4 cm. long; calyx-lobes unequal, shorter than the tube; corolla whitish, 3 

 nun. long, barely exceeding the calyx; stamens unequally inserted; ovules and 



Is solitary in each cell; seed-coats becoming mucilaginous when wetted. 

 Stony soil, in the mountains. 



Gilia gracilis (Dougl.) Hook. Annual; erect, usually simple, 10-30 cm. 

 high, branched above, glabrous below, pubescent and glandular above; leaves 

 sessile, entire, the lower opposite, oblong or obovate, 1-2 cm. long, the upper 

 alternate, lanceolate, acute, 2-4 cm. long; flowers solitary in the forks or axils, 

 short-pedicelled, somewhat cymose through the reduction of the leaves; calyx- 

 lobes subulate, mucronate, twice as long as the campanulate tube, this at 

 length splitting to the base; corolla tubular-salverform, 8-10 mm. long, the 

 tube yellow, not longer than the calyx-lobes, the limb purple-pink; stamens 

 unequally inserted; ovules and seeds solitary in each cell; seed-coats without 

 spiricles. Very common everywhere. 



Gilia humilis (Greene) Piper. Annual, usually branched from the base, 

 the branches ascending, minutely pubescent throughout, 5-15 cm. high; 

 lower leaves opposite, oblong or oblanceolate, obtuse; upper alternate, linear, 

 1-2 cm. long; calyx-lobes subulate, twice as long as the tube, at length splitting 

 to the base and spreading; pedicels unequal;, corolla-tube yellow, 4-10 mm. 

 long, scarcely longer than the calyx, the limb purple, 3 mm. broad; ovules and 

 seeds solitary in each cell, not developing spiricles. Common on hillsides. 



293. POLEMONIUM. Jacob's Ladder. 



Annual or perennial herbs; leaves alternate, pinnate, with 

 entire leaflets; flowers in corymbs, nearly bractless; calyx rotate 

 or campanulate, the tube very short; stamens equally inserted 

 at the summit of the corolla-tube; capsule few-several-seeded. 



Annuals; corolla white, nearly rotate. P. micranthum. 

 Perennials; corolla blue, campanulate. 



Stems low, 15-30 cm. high. P. hutnile. 

 Stems erect, 60-90 cm. tall. 



Leaflets oblong-ovate. P. coeruleum. 



Leaflets linear. P. pectinatum. 



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, obovate 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. Sandy soil, infrequent. 



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

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

 t'i oval, 10-15 mm. long; flowers blue, in open cymes; calyx-lobes triangular, 

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

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

 the edge of the timber, highest peaks of the Blue Mountains. The plants have 

 a bad odor. 



Polemonium coeruleum L. Perennial from horizontal rootstocks, gland- 

 ular-pubescent throughout; stems 60-90 cm. high, erect, 5-10-leaved; leaflets 



