98 Muhlenbergia, Volume ^ 



Kern county, elevation 4000 feet. It is abundant there, grow- 

 ing in roundish mats, the several stems barely ascending. It is 

 said to occur throughout the State, and has considerable altitu- 

 dinal range, occurring at low elevations in the Bay region. 



Vioi^A AUSTiNAE Greene, Pittonia, 5: 30. 1902. 



No. 7125, collected August 7, 1903, about midway between 

 Donner Lake and Summit, Nevada county, elevation 6500 feet, 

 growing in damp grassy places along the road. The plants are 

 in fruit only, but undoubtedly belong to this species. Mrs. Aus- 

 tin got the type in Butterfly Valley, Plumas county. 



LOASACEAE 



ACROLASIA AFFiNis (Greene) Rydb. Bull. Torr. Club, 30: 278- 

 1903. 



Mentzelia affinis Greene, Pittonia, 3: 103. 1890. 



No. 7614, collected April 7, at Caliente, Kern county, 

 where it is not uncommon in sandy ground. A specimen col- 

 lected by Brandegee at the same place is labeled Mentzelia grac- 

 ilenta^ but it can hardly be that species, although it agrees in 

 having pubescent stems instead of "white and shining glabrous 

 stems," as in the type. The flowers have an orange-colored 

 center. It is probably undescribed, but mature fruit is lacking. 



No. 7675, collected April 13, at Kramer, San Bernardino 

 county, in the Mojave desert, has stems agreeing with the type, 

 but the flowers are not large enough and the calyx teeth too 

 long. The capsule has hairs with pustulate base, as in the type. 



Acrolasia viridescens 



Annual: stems erect but rather weak, 2 dm. high, diffusely 

 branched, white and shining, glabrous or nearly so: leaves bright 

 green, sparingly scabrous, sessile, the lower oblong, 7 cm. long, 

 1-2 cm. wide, sinuate pinnatifid, the lobes obtuse; leaves of the 

 middle part of the stem similar but smaller,; those of the upper 

 part lanceolate or. ovate, somewhat irregularly dentate, acumi- 



