58 Muhlenbergia, Volume 9g 
SISYMBRIUM ALTISSIMUM L, Sp. Pl. 959. 1753. 
San Bernardino, a single plant in waste ground, June 25, 
July 20, 1912, Parish 8137,81732. At the same spot the present 
year (1913) over 25 plants are growing from the seed of last 
year’s plant, and a single specimen was seen elsewhere in the 
town. Well established in a fallow field at Redlands, May 20, 
1913, Parish 8522 and Jepson. 
POTENTILLA LEUROCARPA Rydb. N. A. FI. 22: 307. 1908. 
Bottom lands of the Colorado river, February 26, 1913, 
Parish 8498. The specimens were not yet in flower, but they 
were identified by Professor Thornber, who is familiar with the 
species in adjacent Arizona. 
Figure 2. Bursera microphylla Gray. ‘Tree 410 4% feet high, 6 inches 
in diameter at the base. See one foot ruler placed upright against base. Pho- 
tograph by Edward H. Davis, Mesa Grande, Colorado, April, 1g11.”’ 
BURSERA MICROPHYLLA Gray, Proc. Am. Acad. 5: 155. 1861. 
Elaphrium microphyllum Rose, N. A. Fl. 25: 250. 1911. 
Colorado desert, between Fish creek and Carriso creek, 
April, 1911, Edward H. Davis. The specimen received was 
