January 25, 1912 



127 



dex, sparingly leafy: basal leaves rather numerous, 1 to 1.5 dm. 

 long; lower stem leaves about i dm. long, the uppermost 5 cm. 

 long; leaflets commonly 3, numerous, loosely imbricated, flat, 

 those of the basal leaves sometimes oblanceolate, rounded at the 

 apex, those of the stem leaves elliptical and acute or acutish, all 

 I mm. or more wide, the terminal one 6 or 7 mm. long, the lat- 

 eral ones about 2 mm. shorter; free portion of the stipules lanceo- 

 late, entire, 5 to 7 mm. long, 2 mm. wide at base, the decurrent 

 portion 5 or 6 mm. long: cymes rather narrow with erect bran- 

 ches: pedicels slender, 7 mm. long or less: hypanthium saucer- 

 shaped, 3 mm. across, yellowish: bractlets lanceolate, 1.5 mm. 

 long, .5 mm. wide; sepals lanceolate, barely 4 mm. long, i mm. 

 wide: petals white, obovate-orbicular, 4 to 5 mm. long, including 

 the claw of i mm., 3 to 4 mm. wide: stamens 10: filaments fili- 

 form. 



999 



Figure 24. Ivesia halophila. Stem leaf natural size; leaflet 4 diameters; 

 calyx, corolla and stamen, 2 diameters. 



The type, in the herbarium of the Nevada Agricultural Ex- 

 periment Station, is Heller 9261, collected August 4, 1908, in 

 the lower end of Lamoille valley, Elko county, Nevada. It was 

 plentiful in alkaline soil in a meadow pasture, and was not dis- 

 turbed by cattle. 



