722 MISC. PUBLICATION 423, U. S. DEPT. OF AGRICULTURE' 



March to June. Southern Utah and Nevada to Sonora and south- 

 eastern California. 



Sometimes so abundant as to color large areas with its sky-blue 

 flowers. Intergrades with G.filifolia. The common form, especially 

 in southern Arizona, is var. arizonica Craig, 16 with a nearly regular 

 corolla, the lobes about half as long as the tube. The var. zionis 

 Craig, with a distinctly irregular corolla, the lobes about two-thirds as 

 long as the tube, is found in Coconino and Mohave Counties. 



13. Gilia rigidula Benth. in DC, Prodr. 9: 312. 1845. 



Apache, Navajo, Cochise, and Santa Cruz Counties, 4,500 to 6,500 

 feet, dry plains and mesas, May to September. Kansas and Colorado 

 to Arizona and Mexico. 



The species is represented in Arizona by var. acerosa A. Gray (G. 

 acerosa Britton) . The bright-blue flowers are very attractive. 



14. Gilia pungens (Torr.) Benth. in DC, Prodr. 9: 316. 1845. 



Cantua pungens Torr., Ann. Lye, N. Y. 2: 220. 1828. 

 Leptodactylon pungens Nutt., Acad. Nat. Sci. Phila. Jour. ser. 

 2, 1: 157. 1848. 



Navajo and Coconino Counties, 6,500 to 7,000 feet, May and June. 

 Montana to British Columbia, south to New Mexico, northern 

 Arizona, and California, 



The Arizona specimens belong to var. hookeri (Dougl.) Gray. The 

 flowers of this and the next species resemble those of Phlox. 



15. Gilia nuttallii A. Gray, Amer. Acad. Arts andSci.Proc, 8: 267. 1870. 



Leptodactylon nuttallii Rydb., Colo. Agr. Expt. Sta, Bui. 100: 

 279. 1906. 



Apache, Navajo, Coconino, Yavapai, Greenlee, and Gila Counties, 

 6,000 to 7,000 feet, mostly in open pine forests, July and August. 

 Wyoming to Washington, south to New Mexico, Arizona, and Baja 

 California. 



The common, if not the only, form in Arizona is var. fioribunda 

 (Gray) Munz (G.floribunda Gray), characterized by a relatively loose 

 inflorescence and distinctly pedicelled flowers. 



16. Gilia aurea Nutt., Acad. Nat. Sci. Phila. Jour. ser. 2, 1: 155. 



1848. 



Linanthus aureus Greene, Pittonia 2: 257. 1892. 

 ? Gilia ashtonae A. Nels., Amer. Jour. Bot. 25: 114. 1938. 



Navajo County to Mohave County, south to Cochise, Santa Cruz, 

 and Pima Counties, 2,000 to 6,000 feet, common on dry plains and 

 mesas, March to June. Western Texas to southern Nevada and 

 southeastern California. 



The plant is sometimes so abundant as to color extensive areas with 

 its yellow flowers. A rather rare form, var. decora A. Gray, has the 

 corolla limb whitish instead of bright yellow. G. ashtonae, of which 

 the type was collected near Canyon Lake, Maricopa County {Nelson 

 1768), may be merely a form of 67. aurea with exceptionally long 

 pedicels. 



is Craig, Thomas, a revision of the subgenus hugelia of the genus gilia (polemoniaceae). 

 Torre y Bot. Club Bui. 61: 411-428. 1934. See p. 419.) 



