172 POLEMONIACEAE 



the peak in 1889. The present author did not find it on his ascent of Lassen Peak on June 8, 1910, 

 the season being too early, nor on June 22, 1927, the peak being deep in snow and doubtless with 

 an under layer of ash; nor yet again during his third ascent on September 29, 1929. At this latter 

 time, the mountain top was deeply covered with ash and mud from the volcanic eruptions and no 

 herbaceous vegetation was found above the 9300 foot level. The alpine and sub-alpiue herbs had 

 been, apparently, destroyed, including such rare endemics as Draba aureola and CoUomia larsenii. 

 Northward, CoUomia larsenii has been collected on the summits of several volcanic peaks of the 

 Cascade Range as follows: Three Sisters, Ore.; Mt. Jefferson, Ore., Gorman; Mt. Hood, Ore.; 

 Mt. Adams, Wash., Parry; Mt. Rainier, Wash., Piper 456. 



Refs. — CoLLOMiA LARSENII Payson, Univ. Wyo. Publ. Bot. 1:85, fig. 4 (1924) ; Jepson, Man. 

 785 (1925). Gilia larsenii Gray, Proc. Am. Acad. 11:84 (1S75), type loc. Lassen Peak, Lemmon 

 4" Larsen. C. debilis var. larsenii Brand; Engler, Pflzr. 4-™:52 (1907). Gilia debilis var. larsenii 

 Mebr., Contrib. Gray Herb. 56:57 (1918). 



(, 



GILIA R. & P. 



Annual or sometimes perennial herbs. Leaves alternate or disposed in a basal 

 tuft or rosette, pinnately toothed, lobed, or divided, or sometimes entire. Calyx- 

 teeth usually equal, the tube scarious below the sinuses, usually ruptured by the 

 growing capsule. Corolla fnnnelform to salverform or campanulate, blue, yellow, 

 white or red, the lobes mostly shorter than the tube, the stamens equally (rai'ely 

 unequally) inserted on its throat or in the sinuses. Capsule 3-celled and 3-valved, 

 the seeds many, rarely few or one. — Gilia gracilis has opposite leaves. In Gilia 

 gracilis and in G. gilioides the stamens are unequally inserted; in all other species 

 of the genus equally inserted. — Species about 60, North and South America. (Fe- 

 lipe Luis Gil, Spanish botanist of the latter half of the 18th century.) 



A. Plants perennial (or rarely biennial) ; see also no. 17. 



Flowers scarlet (pink or yellowish) ; inflorescence elongated or thyrsoid 1. G. aggregata. 



Flowers white; inflorescence capitate 2. G. congesta. 



B. Plants annual. 



I. Cells of CAPSirLE several-seeded, the seeds small. 



1. Corollas funnelform to tubular. 



a. Inflorescence leafless or the leaves sparse and reduced or bract-like. 



Leaves narrow and entire or mostly so ; flowers eymose or paniculate ; montane. Sierra Nevada and 

 North Coast Ranges (and S. Cal. mts.). 



Corolla purple to magenta, 4 to 9 lines long 3. G. leptalea. 



Corolla white, 2 to 3 lines long 4. G. capillaris. 



Leaves pinnately or bipinnately lobed or divided, or the blades with the margin merely toothed. 

 Lobes or teeth of the leaves longer than broad, the blades glandular or non-glandular; seeds 

 mucilaginous when wetted. 

 Leaves basal or mostly so, the cauline leaves few and reduced or bract-like. 

 Basal leaves not glandular, petioled. 



Basal leaves pinnately or bipinnately cleft or lobed or divided into usually many 

 to numerous segments: cauline leaves few and reduced, petioled; co- 

 rolla blue, purple, pink or white; flowers pediceUed in mostly loose 



cymes or panicles 5. G. tenuiflora. 



Basal leaves pinnately divided into 5 to 9 lobes, the cauline leaves sessile, pal- 

 mately divided into 3 to 5 lobes; corolla yellow, 2 to 4 lines long; 

 Mohave Desert, Mt. Piiios region, s. Sierra Nevada in Kern Co., Inyo 



Co 6. G. ochroleuca. 



Basal leaves glandular, petioled, the cauline sessile; corolla 4 to 6 lines long; e. 



Mohave Desert and Inyo Co 7. G. scopulorum. 



Leaves more or less equally distributed along the stem, the blades pinnately or bipin- 

 nately dissected into filiform or linear (rarely broad) segments. 

 Flowers in large dense heads, the heads usually' spherical ; hyaline intervals of calyces 

 typically broader than the longitudinal herbaceous ribs or bands. 

 Corolla-throat shorter than the tube ; stamens exserted. 



Corolla blue or white; calyx turbinate, ruptured in fruit; heads about 15 

 to 50-flowered. 

 Plants slender; corolla-lobes linear; mostly North Coast Ranges and 

 n. Sierra Nevada 8. G. capitata. 



