6o 



POLEMOXIACEAE. 



VOL. III. 



Flowers in dense or capitate cymes, or heads ; flower-clusters leafy-bracted. 



Perennial ; corolla-tube not longer than the calyx. 5. G. ibcridifolia. 



Annual ; corolla-tube 2-3 times as long as the calyx. 6. G. pumila. 



Corolla rotate ; leaf-segments acicular. 7. G. acerosa. 



I. Gilia longiflora (Torr.) Don. White-flowered Gilia. Fig. 3472. 



Cantua longiflora Torr. Ann. Lye. 2: 221. 1827. 

 Gilia longiflora Don, Gard. Diet. 4: 245. 1838. 

 Collomia longifl. A. Gray, Proc. Am. Acad. 8 : 261. 1870. 



Annual, glabrous, paniculately branched, i-2 

 high. Leaves all alternate, sessile, \'-2\' long, pin- 

 nately divided into linear-filiform segments or the 

 uppermost entire; flowers numerous, white, panicu- 

 late, about 2 long ; calyx-teeth triangular-lanceolate, 

 acuminate, shorter than the tube ; corolla salverform, 

 its tube narrow, 4 or 5 times as long as the orbicular 

 or ovate, rounded or pointed, spreading lobes ; sta- 

 mens unequally inserted; ovules 8-12 in each cell; 

 capsule narrowly oblong, exceeding or equalling the 

 calyx ; seed-coat mucilaginous and emitting spiral 

 threads when wetted. 



In dry soil, Nebraska and Colorado to Texas and Ari- 

 zona. May-Sept. 



Gilia rubra (L.) Heller (Gilia coronopifolia Pers.), a 

 related species with less spreading corolla-lobes, is com- 

 monly cultivated, and rarely escapes from gardens to 

 roadsides and waste grounds. 



2. Gilia aggregata (Pursh) Spreng. Scar- 

 let Gilia. Fig. 3473. 



Cantua aggregata Pursh, Fl. Am. Sept. 147. 1814. 

 Gilia aggregata Spreng, Syst. i : 626. 1825. 



Biennial, pubescent or puberulent; stem simple 

 or sparingly branched, 2-4 high, leafy at least 

 below. Leaves alternate, the basal often tufted, 

 mostly petioled, i'-3' long, pinnately parted into 

 narrowly linear segments ; inflorescence narrowly 

 thyrsoid-paniculate, often 12' long; flowers ses- 

 sile or very nearly so in small peduncled clusters, 

 scarlet or red ; corolla tubular-funnelform, the 

 tube i'-ii' long, slightly thicker upward, the limb 

 cleft into ovate or lanceolate acute or acuminate 

 spreading or recurved lobes; stamens unequally 

 or about equally inserted in the throat ; ovules 

 numerous ; seeds mucilaginous and emitting spiral 

 threads when wetted. 



In dry soil, western Nebraska (according to . 

 Coulter) to Texas and Mexico, west to British 

 Columbia and California. June-Aug. 



3. Gilia pinnatifida Nutt. Small-flowered 

 Gilia. Fig. 3474. 



Gilia pinnatifida Nutt. ; A. Gray, Proc. Am. Acad. 8 : 



276. 1870. 



Biennial or perennial from a deep root, much 

 branched, viscid-glandular, 6'-2 high. Leaves 

 thick, pinnatifid, the basal tufted, i'-3' long, the 

 segments linear-oblong, sometimes toothed, ob- 

 tuse or acutish, 2"-6" long, those of the stem 

 alternate, smaller, the uppermost minute and en- 

 tire ; flowers very numerous, small, paniculate, 

 some sessile, some petioled ; calyx 5-lobed. the 

 lobes lanceolate to ovate; corolla salverform, 

 3 "-5" long, the limb violet or blue, its white tube 

 longer than the calyx and its pboyate lobes ; sta- 

 mens exserted ; seeds not mucilaginous nor emit- 

 ting spiral threads when wetted. 



In sandy soil, western Nebraska anJ Wyoming to 

 New Mexico. Has been mistaken for G. inconspicua, 

 June-Aug. 



