352 MUNZ AND JOHNSTON: PLANTs oF CALIFORNIA—II 
/ Claytonia lanceolata var. Peirsonii var. nov. 
As in the typical form of the species, but with peduncle and 
primary axis of a pmloae ae shortened so as to make the flowers 
appear umbellat 
TYPE: near ae s Cabin on Ontario Ridge, San Gabriel 
Mountains, at 8200 feet altitude, May 29, 1920, Wa. &. 
Mabel Peirson (Baker Herb. 10524). 
Known only from the eastern portion of the San Gabriel 
Mountains where, beside the type, we have seen a collection, 
. W. Peirson 2151, from the Devil’s Backbone at 7000 feet 
altitude. It is probable that this variety will necessitate 
a es ee 4 the status of C. umbellata Wats. (Bot. 
King Exp. 43. pl. 6, f. 4-5. 1871) of the northeastern part 
of California, vee re principal character of that species is the 
same umbellate inflorescence that characterizes our variety. 
The new variety, however, may be told from C. umbellata 
by its shorter-petioled, broader leaves, which are widest below 
the middle (instead of above), and by its shorter stem, larger 
flowers, and isolated southern range. 
THLASPI ARVENSE L. 
Thlaspt arvense L. Sp. Pl. 646. 1753. 
This crucifer, common in the Rocky Mountain region, can 
now be reported from Southern California (F. W. Peirson 66) 
at Henniger’s Flats near Pasadena. The only other collection 
we have seen from California is by Chase from Adin, in Modoc 
County. 
’ Draba corrugata var. saxosa (Davidson) comb. nov. 
Draba saxosa Davidson, Bull. So. Cal. Acad. 19: 11. 1920. 
The phase of Draba corrugata that is found on San Jacinto 
Peak may well be deserving of a varietal name, but scarcely 
of a specific one. As pointed out in another paper (Johnston, 
Pl. World 22: 88. 1919) the San Jacinto plant differs only in 
matters of degree and is closely simulated by some collections 
from the San Bernardino Mountains, 
