88 LEAFLETS. 



lanthus. The species have a wide range from away among the 

 Eocky 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 Calif ornian annuals belonging partly to 

 middle elevations in the Sierra Nevada and partly to correspond- 

 ing elevations in the inner Coast Kange 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 Pleiocardia 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 Sibara 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 Arabis alliance. The calyx, as to its 

 form, is that of Pleiocardia, but the texture of it is that of Eu- 

 clisia; 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 DiVBasrFOLiuM. S. diversifolus, Wats., doubt- 

 less including 5. linearis, Greene ; for among the best specimens 

 of the latter, I now perceive one bearing in the midst of ' its 

 array of long flliform leaves a single pinnatisect one. The seg- 

 ments are so remote and narrow as to easily blind one to the 



