February 6, 1908 [s 
i SISYMBRIUM VASEYI (Coulter) Watson 
By T. D. A. COCKERELL 
Several years ago I found this very insufficiently known 
plant at Beulah, prox. 8000 feet, in the mountains near Las 
Vegas, New Mexico. Its true generic position is doubtless not 
in Szsymbrium, but I will not venture to suggest where it should 
be placed. The following description taken (July 18) from the 
living plant will serve to make its characters clearer than here- 
tofore: 
Tall (18 inches to 3 feet or more high), branching, the 
branches leaving the stem at an angle of about 50 degrees: pale 
bluish-green, smooth, perfectly glabrous: stem stout at base 
(8mm. thick): cauline leaves sagittate, clasping at base, lanceo- 
late, about 70 mm. long and 16 broad, the upper smaller: flowers 
in axillary racemes, pure white: filaments stout, white; anthers 
pale yellow: sepals white: petals broad, entire, obtuse, the nar- 
row claw hardly half the length of the blade: stamens six: diam- 
eter of flower about 8mmi.: fruiting pedicels about 13 mm. long, 
spreading at right angles to stem: the linear cylindrical pod 
about 21mm. long, ascending vertically, more or less curved 
inwards. Plant not scented, but leaves when crushed have an 
odor of mustard. 
Growing by the creek at the Blake ranch; the food plant cf 
Phyllotreta pusilla (adult) and Prcrzs occidentalis (larvae). 
On July 26,1 found close by a 7helypodium with almost 
identical leaves and stems. It was past flowering, but I man- 
aged to find one plant with some flowers, the petals short, pale 
lilac. 
