STUDIES IN THE CRUCIFERE. 199 
about 10 to 16 inches high, simple, shortly racemose at 
summit: leaves canescent with a dense indument of the 
usual forked and appressed hairs, the tufted basal ones 
with erect petioles and spreading oblanceolate runcinate- 
toothed or entire blade, those next succeeding more con- 
spieuously and pinnately runcinate, the teeth large and 
triangular, the upper cauline gradually shorter, linear, 
entire: flowers rather large, yellow; sepals pubescent, ob- 
viously saccate: pods not seen. 
On dry hills among nut pines and cedars at Aztec, New 
Mexico, 27 April, 1899, C. F. Baker. Related to C. 
argillosus of the bluffs of the upper Arkansas, but taller, 
much less pubescent, and with a different foliage. The 
leaves are peculiarly rigid and fragile; nothing remaining 
of the basal tuft at flowering time except the petioles, the 
blades apparently having been broken off and swept away 
by the winds of winter. Most of the specimens are simple 
and seem to be biennial, but others have a branched cau- 
dex, as if surviving the biennial period. 
v SOPHIA PROcERA. Annual, erect, 3 to 6 feet high, simple 
to above the middle, the whole upper portion forming a nar- 
row and rather strict panicle of subsessile racemes: herbage 
appearing altogether green and glabrous to the unaided eye, 
but the stem and growing parts sparsely puberulent with 
minute forked or somewhat stellate hairs: leaves sessile, 
pinnate, the pinne pinnatifid, of lanceolate outline, acute: 
fruiting racemes mostly 3 to 6 inches long and strict, the 
pedicels slender, erect or merely ascending, about the length 
of the linear very acute 6 to 12-seeded pods, these 4 or 5 
lines long. 
Common in open pine woods of the Colorado Rocky 
Mountains, at 8,000 or 9,000 feet altitude. Excellent 
