Collomia. POLEMONIACEJE. 135 



alone wants the spiricles, which are so conspicuous on the seed-coat of the gen- 

 uine species, in which they were first detected.) 



* Calyx obconical : leaves sessile, entire or sometimes sparingly incised, 

 t Flowers capitate-crowded and leafy-bracted, or a few of them scattered. 



C. grand.ifl.6ra, Dougl. Erect, a foot or two high : leaves linear- or oblong-lanceolate, 

 or uppermost lance-ovate : calyx-lobes broad and obtuse : corolla buff or salmon-color, nar- 

 row-funnelform, an inch long, showy. Lincll. Bot. Reg. t. 1174 ; Hook. Bot. Mag. t. 2894. 

 Plains, &c., from the Rocky Mountains, lat. 48, to Nevada and California. Var. tenuifolia, 

 Benth., is a form with more slender corolla. 



C. linearis, Nutt. More branching and in age spreading, a span or two high : calyx- 

 lobes triangular-lanceolate, acute : corolla half inch long, from lilac-purple to nearly white, 

 very slender, little enlarged at the throat ; the limb small. Gen. i. 126 ; Lindl. Bot. Reg. 

 t. 11GG; Hook. Bot, Mag. t. 2893. Lake Winnipeg and Mackenzie River (and even New 

 Brunswick, on the coast, Fowler, perhaps a chance introduction), west to the Pacific, and 

 south to California and Colorado. Passes into 



Var. SUbulata, Gray. 1. c. A low and slender form, diffusely branching from the 

 base: leaves narrow and acute: flowers few in the lower forks: calyx-lobes attenuate- 

 subulate ; the tips almost awnlike from a broad base, rather longer than the tube. C. tine- 

 toria, Kellogg, Proc. Acad. Calif, iii. 17, t. 2. Nevada and adjacent parts of California 

 and Oregon. 



t -i Flowers scattered, all solitary in the forks. 



C. tenella, Gray. Slender, 3 or 4 inches high, loosely branched, viscid : leaves linear 

 with a long tapering base, obtusish : flowers solitary in all the forks, remote, almost ses- 

 sile : calyx-lobes rather broadly triangular, acute, shorter than the broadly turbinate tube, 

 about half the length of the narrow purplish corolla, this 3 or 4 lines long. Proc. 1. c. ; 

 Watson, Bot. King, 202, & Bot. Calif, i. 488. Dry hills, Utah and Nevada to eastern and 

 northern parts of California. 



* * Calyx rounded at base : leaves sessile, entire, the lower oftener opposite : flowers rather loosely 

 cymose'or scattered. The mucilage-cells of the seed-coat wholly destitute of spiral fibres ! 



C. gracilis, Dougl. At length corymbosely much branched and spreading, 2 to 6 inches 

 high : leaves lanceolate, or linear or the lowest oval or obovate : corolla 5 lines long, pur- 

 ple or violet ; the narrow tube yellowish and seldom longer than the subulate-linear 

 lobes of the deeply-cleft calyx. Benth. in Bot. Reg. no. 1022, & DC. Prodr. ix. 308. 

 Giiia gracilis, Hook. Bot. Mag. t. 2924. Collomia micrantha, Kellogg, 1. c. fig. 3. Colorado 

 and New Mexico and from Brit. Columbia south to Arizona. (W. S. Amer.) 



$::$: Calyx obt use or acute at base : leaves all alternate and mostly incised or pinnately divided, 

 all the low'er petioled: corolla pinkish-purple, slender, half inch or less long, twice or thrice the 

 length of the calyx. 



C. gilioides, Benth. Stems loosely branching, erect or diffuse, a span to 2 feet long : 

 leaves nearly simply cut or parted into lanceolate or narrowly oblong divisions : flowers 

 loose or scattered : calyx obtuse or rounded at base, deeply cleft ; the lobes linear-subu- 

 late : stamens moderately unequal in insertion : ovules solitary or rarely in pairs : capsule 

 globular. Gray, Proc. Am. Acad. I.e. (with var. (jliit.inosa) & Bot, Calif. I.e. C. gilioides 

 & C. yhitinosa, Benth. 1. c., the latter a more viscid state of this variable species. Gilia 

 dtvaricatn, Nutt. PI. Gamb. 155, a slender form. 



C. heterophylla, Hook. Low, diffuse : leaves thin, mostly pinnatifid with the lobes 

 again incised, or bipinnatifid, some of the uppermost less cut or even entire and bract- 

 like, subtending the more or less capitate or looser clusters of flowers : calyx acute at 

 base, cleft barely to the middle ; the lobes ovate-lanceolate : stamens very unequally in- 

 serted : ovules 2 or 3 in each cell: capsule ellipsoidal. Bot. Mag. t. 2895; Bot. Reg. t. 

 1347. Courtoisia lipinnatificla, Reichb. Tc. Exot. t. 208. Gilia Sessci, G. Don. Navarretia 

 heterophylla, Benth. in DC. 1. c. Brit. Columbia to California: common. 



2. PHLOGXNTHEA, Gray, 1. c. Ovules numerous, i. e. 6 to 12 in each cell: 

 filaments unequal as well as unequally inserted, sometimes a little declined: 

 biennials (sometimes perhaps perennials), or annuals, slightly if at all viscid. 

 (Species of Gilia, sect. Ipomopsis, Benth.) 



