276 POLEMONIACEAE. 



11. Phlox longifolia Nutt. In valleys and on hills from Mont, and Wash. 

 to Colo, and Ore. Mancos; Leroux Creek, Delta Co.; Palisade, Mesa Co.; 

 Minturn. 



12. Phlox Stansburyi (Torr.) Heller. (P. speciosa Stansburyi Torr.) In 

 dry regions from Colo, to N. M. and Calif. Alt. 7000-8000 ft. Los Pinos 

 (Bayfield) ; Middle Park; Cerro Summit; Mancos; Hotchkiss; Cimarron; 

 Palisades; Dolores. 



2. MICROSTERIS Greene. 



i. Microsteris micrantha (Kellogg) Greene. (Collomia micrantha Kellogg; 

 C. gracilis A. Gray, in part) In sandy soil from Neb. and Wyo. to Colo, and 

 Calif. Alt. 4000-9000 ft. Los Pinos (Bayfield); Veta Pass; headwaters of 

 Sangre de Cristo Creek; west of Ft. Collins; southeast of La Veta; Mancos 

 Canon; Cedar Edge, Gunnison watershed; near Denver; Horsetooth Gulch; 

 gulch west of Soldier Canon; Trinidad; Boulder; Buena Vista. 



3. LINANTHUS Benth. 



i. Linanthus Harknessii (Curran) Greene. (Gilia Harknessii Curran; 

 G. pharnaceoides A. Gray, in part) In sandy or loose soil 'from Mont, and 

 B. C. to Colo, and Calif. Middle Park; Steamboat Springs. 



4. GILIA R. & P. 



Flowers capitately or spicately glomerate. 

 Perennials ; flowers in dense heads or spikes. 



Leaves entire. i. G. spergulifolia. 



Leaves at least some of them pinnatifid. 



Plant branched only at the base or simple ; stem or branches strict, with 



a single head-like or spike-like inflorescence. 



Inflorescence spike-like, more or less interrupted; corolla greenish- 

 white, its lobes acute. 2. G. spicata. 

 Inflorescence head-like ; corolla white, its lobes obtuse. 



3. G. cephaloidea. 

 Plants branched above as well as the base ; inflorescence of several heads, 



more or less corymbosely arranged. 

 Corolla-lobes about 2 mm. long ; calyx-teeth and bracts green with very 



short spine-tips ; branches straw-color. 4. G. iberidifolia. 



Corolla-lobes 4-5 mm. long ; calyx-lobes and bracts rose-tinged with long 



spine-tips ; stems tinged with purple. 5. G. roseata. 



Annuals, repeatedly branched, with small clusters of flowers in the axils 



of the leaves, more capitate at the ends of the branches. 

 Divisions of the leaves linear-filiform ; floral leaves similar ; corolla twice 



as long as the calyx. 6. G. pumila. 



Divisions of the leaves very short, oblong ; floral leaves broader and shorter, 

 more entire ; tube of the corolla slightly exceeding the calyx. 



7. G. polytladon. 



Flowers openly paniculate or thyrsoid-paniculate. 

 Leaves pinnately divided. 



Corolla-tube over i cm. long ; corolla salver-form ; calyx-lobes lanceolate, 



attenuate and spine-tipped. 

 Inflorescence thyrsoid, narrow. 



Corolla-lobes acute or acuminate ; corolla usually scarlet or pink. 

 Calyx only slightly scarious at the angles ; its lobes lanceolate-attenu- 

 ate, longer than the tube. 



