88 LEAFLETS. 
lanthus. The species have a wide range from away among the 
Rocky Mountains, throughout the Great Basin, several reaching 
California, and many are as yet undescribed. They demand an 
investigation that I can not now give. 
There are a few more Californian annuals belonging partly to 
middle elevations in the Sierra Nevada and partly to correspond- 
ing elevations in the inner Coast Range which, in so far as 
known have permitted to figure as members of the impossible 
Streptanthus of Gray and of Watson. Nor can I consistently 
refer any one of these to either of those new genera already out- 
lined. One of them is Streptanthus diversifolius, Wats. After 
the manner of typical Ple‘ocardia it bears a few heart-shaped 
though commonly long-pointed bracts near the inflorescence, 
though in habit and aspect it is again most unlike these, being 
tall and paniculate-branched, and exhibiting a most peculiar 
foliage. The lowest leaves are perfectly entire and linear-fili- 
form. In the middle of the stem are borne a few that are 
pinnatisect, made up of a filiform rachis along which are 
scattered a few filiform segments. So far, as also as by the 
perfect smoothness of and the bluish bloom covering all parts 
of the plant, it promptly recalls my genus Sara of the Lower 
Californian coasts and islands. But the flowers have all the 
general characteristics of the allies of Streptanthus when com- 
pared, with those of the Aradis alliance. The calyx, as to its 
form, is that of Pletocardia, but the texture of it is that of Zu- 
clista; also the upper pair of stamens are united. The pods are 
very long, slender, straight and deflexed, and the seeds are 
wing-margined, the valves being flattened. As representing A 
genus, I name this fine type 
MITOPHYLLUM DIVERSIFOLIUM. S. diversifolus, Wats., doubt- 
less including S. Zxearts, Greene ; for among the best specimens 
of the latter, I now perceive one bearing in the midst of its 
array of long filiform leaves a single pinnatisect one. The seg- 
ments are so remote and narrow as to easily blind one to the 
