424 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



15. Sphaeralcea ribifolia Woot. & Standi. Bull. Torrey Club 36: 109. 1909. 

 Type locality: Man in and Sloan Ranch, Grant County, New Mexico. Type 



collected by Wooton, August 13, 1902. 



Range: Known only from the type locality. 



16. Sphaeralcea laxa Woot. & Standi. Bull. Torrey Club 36: 108. 1909. 



Type locality: Frisco, Socorro County, New Mexico. Type collected by Wooton, 

 July 25, 1900. 



Range: Southwestern New Mexico. 



New Mexico: Frisco; Graham. Upper Sonoran Zone. 



10. DISELLA Greene. 



Prostrate or ascending herbaceous perennials, stellate-scurfy or lepidote, with rather 

 stout short stems and simple leaves oblique at the base; flowers solitary or few in the 

 axils, usually pale yellowish within, pink-tinged without; calyx more or less 5-angled, 

 with 2 or 3 deciduous bractlets. 



KEY TO THE SPECIES. 



Plants merely looBely stellate-pubescent; leaves rounded at the 



a p ex 1. I), hederacea. 



Plants densely lrpidote-pubescent; leaves acute. 



J, caves obliquely ovate or deltoid-lanceolate, seldom or never 



with lobes at the base 2. D. lepidota. 



Leaves linear-lanceolate or narrowly oblong, with conspicuous 



narrow lobes at the base 3. D. sagittaejolia. 



1. Disella hederacea (Dougl.) Greene, Leaflets 1: 209. 190G. Meloncilla. 

 Malva hederacea Dougl.; Hook. Fl. Bor. Amor. 1: 107. 1830. 



Sida hederacea Torr.; A. Gray, Mem. Amer. Acad. n. ser. 4: 23. 1849. 



Type locality: "Sides of streams, upon their low projecting banks, in the interior 

 districts of the Columbia." 



Range: Western Texas to Washington and California. 



New Mexico: Albuquerque; Magdalena;Mesilla Valley. River valleys and plains, 

 mostly in alkaline soil, in the Lower Sonoran Zone. 



This and the next are common weeds, in irrigated lands of the Rio Grande Valley 

 in particular, though not restricted to this region. They are usually abundant on 

 rather compact and sometimes slightly alkaline soils which get occasional irrigation, 

 where they carpet the ground with their spreading, decumbent stems. The peculiar 

 oblique, truncate leaves are characteristic. 



2. Disella lepidota (A. Gray) Greene, Leaflets 1: 209. 1906. 

 Sida lepidota A. Gray, PI. Wright. 1: 18. 1852. 



Type locality: "New Mexico." Probably this should be western Texas. 

 Range: Western Texas to southern Arizona. 



New Mexico: Cactut Flat; Mangas Springs; Mesilla Valley; White Sands; Deming; 

 Roswell; Hanover Mountain. Dry fields, in the Lower Sonoran Zone. 



3. Disella sagittaefolia (A. Gray) Greene, Leaflets 1: 209. 1906. 

 Sida lepidota sagittaefolia A. Gray, PI. Wright. 1: 18. 1852. 



Type locality: Mountain valley, sixty miles west of the Pecos, Texas. 

 Range: Western Texas to Arizona and southern Colorado. 



New Mexico: Laguna Colorado; Socorro; near White Water; lake east of Dona Ana 

 Mountains. Dry plains, in the Lower and Upper Sonoran zones. 



