STUDIES IN THE CRUCIFERJ. 199 
7. €. CALIFORNICUS. Erysimum Californicum, Greene, 
Eryth. iii. 69. Biennial, very stout, the stem and branches 
strongly angled: leaves runcinate-toothed: pubescence of 
the usual divided and appressed hairs extending even to 
the outside of the large petals, these divergent in pairs and 
thus irregularly cruciform: pods spreading, slender, elon- 
gated, sharply 4-angled, not beaked. 
Of the inner Coast Range foothills in central California. 
By a concise but thorough diagnosis of this species given in 
the third volume of Erythea it is made clear that this can be 
no near ally of C. capitatus ; for, in contrast with the stout flat 
pods of that species, are the long slender sharply angular 
ones of C. Californicus, at least according to the description. 
It did not at first occur to me that the description would fall 
under the criticism of a professed botanist unable to draw 
the inference that a pod “sharply rhombic” in cross-section 
must be as sharply in some way 4-angled when viewed as a 
whole. ! 
8. C. AsPER, Nutt. Gen. ii. 69. Erysimum asperum, DC. 
Syst. ii. 506; Hook. Fl. Bor-Am. i. 64, t. 22. The genuine 
C. asper, with which several readily distinguishable species 
have latterly been confused, is excellently represented by the 
plate in Hooker. Tt inhabits chiefly the lighter and some- 
what sandy soils of the prairies of the Dakotas, northwestern 
Minnesota, and Manitoba, ranging southward to the lower 
foothills of middle Colorado Mountains. Its pubescence is 
wholly of completely 2-parted appressed hairs and is dense. 
The large perfectly cruciform corollas form a short compact 
raceme, this little elongated even in fruit; the greatly elon- 
gated pods almost divaricately spreading. A very consid- 
erable proportion of the Rocky Mountain region herbarium 
Specimens under this name belong to the next. 
9. C. AsPERRIMUS. Erysimum pumilum, Nutt. in T. & G, 
Fl. i. 95, probably. Low and stout, simple, or the racemes 
' Ree Gray's Syn. Fl. i. 144, under Erysimum grandiflorum. 
