Rydberg : Studies on the Rocky Mountain Flora 686 



Idaho: Idaho Falls, 1901, Merrill & Wilcox, Syo. (Type in 

 herb. N. Y. Botanical Garden.) 



II. Abronia Carletoni CoLilt. & Fisher, Bot. Gaz. 17: 349. 



1892 

 Colorado. 



12. Abronia villosa S. Wats. Am. Nat. 7: 302. 1873 

 Southern Utah to Arizona and California. 



13. Abronia cycloptera A. Gray, Am. Journ. Sci. II. 15: 319. 



1853 

 From Wyoming to Texas and Arizona. 



14. Abronia pedunculata (M. E. Jones) 

 Abronia viicraiitJia pedunculata M. E. Jones, Proc. Cal. Acad. 

 II. 5 : 716. 1895. 



In the Navajo Basin of eastern Utah. 



15. Abronia micrantha Torr. Frem. Rep. 96. 1845 

 From South Dakota to Montana and New Mexico. 



2. HERMIDIUM S. Wats. King's Rep. 5: 296. 1871 

 A monotypic genus. 



I. Hermidium alipes S. Wats. /. c. 

 Nevada and western Utah. 



3. QUAMOCLIDION Choisy ; DC. Prod. 13- : 429. 1849 

 This genus was based on two species, of which the second was 

 referred doubtfully to the genus. The first had before been known 

 as a species oi Mirabilis, viz., J/, triflora Benth. The type of the 

 genus Mirabilis L. is M. Jalapa L. In the latter the filaments are 

 united at the base, the fruit is not viscid and the corolla is salver- 

 shaped with a long tube and broad limb. In Quainoclidion the 

 filaments are distinct, the fruit viscid and the corolla from nearly 

 cylindrical to bell-shaped but with a small limb. In Mirabilis the 

 flowers are solitary and in the typical species of Quainoclidion 3—6 

 in the involucre ; but as the number of flowers are not of value as 

 a generic character I have here included a species with one-flow- 

 ered involucres. 



