144 POLEMONIACEJ3. Gilia. 



form ; the tube little exceeding the calyx ; its lobes oval or oblong : stamens 

 shorter than the corolla-lobes, inserted in or near the sinuses : biennials, short- 

 lived perennials, or annuals, low or dwarf, more or less woolly-pubescent when 

 young : leaves simply pinnatifid or entire. 



* Leaves all entire, acerose-subulate or filiform: filaments slender. (Approaches H-ugelia.) 



Gr. "Wrigiltii, Gray. Stems rigid, virgate, a foot high from an indurated or woody base 

 or perennial '? root, very leafy to the top : leaves rigid, cuspidate-tipped : flowers capi- 

 tate-crowded : bracts ovate-lanceolate, the larger ones sparingly laciniate, tipped with an 

 awn-like cusp, as are the subulate calyx-lobes; these slightly shorter than the tube of the 

 corolla : ovules 3 or 4 in each cell (4 lines long). Proc. Am. Acad. viii. 273. W. Texas, 

 on the Rio Grande 40 to 60 miles below El Paso, Wri/jttt. 



G. Gunnisoni, Torr. & Gray. Annual, a span high, slender, at length almost glabrous, 

 loosely paniculate-branched : leaves scattered, linear-filiform : bracts short, lanceolate, 

 entire, tipped (like the triangular calyx-lobes) with a short cusp: flowers capitellate; the 

 heads terminating slender peduncle-like branches : tube of the corolla slightly longer than 

 the calyx and longer than its lobes: ovules 2 or sometimes 3 in each cell. Pacif. 11. Rep. 

 ii. 129, t. 9. S. E. Utah, Kreusfddt, Newberrij, Brandegee. 



* * Leaves all or most of them pinnately parted into few narrow linear divisions, or sometimes all 

 entire: filaments short: tube of the corolla not at all or at length slightly exceeding the calyx: 

 flowers densely capitate-clustered: perennials of short duration or biennials; the base of the 

 simple or clustered stems or root hard and ligneous. 



G. spicata, Nutt. Stems rather stout, erect, simple, or several from the fusiform root, a 

 span or two high : capitate flower-clusters crowded in an elongated virgate and spike-like 

 thyrsus : leaves thickish, almost filiform, some about 3-clef t, occasionally all entire, barely 

 mucronate : corolla-lobes oblong-ovate, shorter than the tube : anthers subsessile in the 

 throat : ovules 4 to G in the cells. Benth in Kew Jour. Bot. iii. 290 ; Gray, 1. c. G. spicata^ 

 & G. trijida, Nutt. PI. Gamb. 156. Rocky Mountains, Wyoming to Colorado and Utah. 



Var. capitata, Gray, 1. c. A dwarf form : leaves nearly all entire : thyrsus short 

 and capitulif orm : filaments as long as the anther : approaches the next species. Alpine 

 region, from Black Hills in Dakota to Colorado. 



G. COngesta, Hook. Stems erect or spreading (3 to 12 inches high) from a tufted base, 

 bearing single terminal or few and corymbose capituliform cymes : leaves with 3 to 7 mu- 

 cronate divisions, or some of them entire : lobes of the corolla oval, nearly as long as the 

 tube, which does not exceed the usually aristulate-tipped calyx-lobes : exserted filaments at 

 length as long as the anthers : ovules 2 to 4 in each cell. Hook. Fl. ii. 75, & Ic. t. 235. 

 Wyoming and Colorado east of the Rocky Mountains to Oregon and the Sierra Nevada, 

 California. Tube of the white corolla not over 2 lines long. 



Var. crebrifolia, Gray, 1. c. Depressed ; the tufted stems 2 or 3 inches long, 

 crowded with small entire leaves, and terminated by a single capitate cluster. G. crebri- 

 folia, Nutt. 1. c. Mountains of Colorado and Utah. Connected with G. coiyesta by some 

 intermediate forms. 



G. iberidifolia, Benth. Leaves more rigid than in the preceding and the lobes cuspi- 

 date-tipped, as also the bracts : capitate cymes corymbose : filaments shorter : ovules soli- 

 tary in each cell. Hook. Kew Jour. Bot. iii. 290. Scott's Bluffs and Blackwater, North 

 Platte, Nebraska and Wyoming, Geyer, II. Enyelmann. Perhaps only a form of G. conyesta. 



* * * Leaves pinnatifid, trifid, or some of them entire: flowers cymulose-glomerate and leafy 

 bractecl, or at length loose : low annuals, brandling from the base, only a span high : calyx-lobes 

 aristnlate-cuspidate. 



G. pumila, Nutt. Stems loosely woolly, at least when young, leafy : leaves narrowly 

 linear, entire or most of them 2-4-parted into diverging linear lobes, mucronate : tube of 

 the corolla slender, about thrice the length of its lobes and twice the length of the aristu- 

 late-tipped calyx-lobes : filaments slender, inserted in the sinuses, exserted, shorter than the 

 lobes of the corolla: ovules about 6 in each cell. PI. Gamb. 156; Gray, 1. c. G. trijida, 

 Benth. in Kew Jour. Bot. iii. 291. W. Texas, and New Mexico to W. Nebraska, and west 

 to the Sierra Nevada. Tube of the corolla 3 or nearly 4 lines long; the limb small. 



G. polycladon, Torr. Stems puberulent or sparsely pubescent, diffuse, very few-leaved : 

 leaves pinnatifid or incised ; the lobes short, oblong, abruptly spinulose-mucronate, those 



