424 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
15. Sphaeralcea ribifolia Woot. & Standl. Bull. Torrey Club 36: 109. 1909. 
Tyre Locaity: Martin and Sloan Ranch, Grant County, New Mexico. Type 
collected by Wooton, August 13, 1902. 
Rance: Known only from the type locality. 
16. Sphaeralcea laxa Woot. & Stand. Bull. Torrey Club 36: 108. 1909. 
TyPE Locatity: Frisco, Socorro County, New Mexico. Type collected by Wooton, 
July 25, 1900. 
RanGeE: 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 loosely stellate-pubescent; leaves rounded at the 
OL, 1. D. hederacea. 
Plants densely lepidote-pubescent; leaves acute. 
Leaves obliquely ovate or deltoid-lanceolate, seldom or never 
with lobes at the base...........2........ ween ee eeeeee 2. D. lepidota. 
Leaves linear-lanceolate or narrowly oblong, with conspicuous 
narrow lobes at the base...............2.-2.---------. 3. D. sagittaefolia. 
1. Disella hederacea (Dougl.) Greene, Leaflets 1: 209. 1906. MELONCILLA. 
Malva hederacea Dougl.; Hook. Fl. Bor. Amer. 1: 107. 1830. 
Sida hederacea Torr.; A. Gray, Mem. Amer. Acad. n. ser. 4: 23. 1849. 
Tyrer Locauiry: ‘‘Sides of streams, upon their low projecting banks, in the interior 
districts of the Columbia.” 
Rance: Western Texas to Washington and California. 
New Mexico: Albuquerque; Magdalena; Mesilla Valley. River valleysand 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, Pl. Wright. 1: 18. 1852. 
Tyrr Locanity: ‘‘New Mexico.”” Probably this should be western Texas, 
Rance: Western Texas to southern Arizona. 
New Mexico: Cactus 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, 1908. 
Sida lepidota sagittaefolia A. Gray, Pl. Wright. 1:18. 1852. 
Tyre, LocALity: Mountain valley, sixty miles west of the Pecos, Texas. 
Rance: 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. 
