NEW GENUS OF CRUCIFER.E. 11 
small, loosely racemose. Sepals oblong, equal at base, or 
nearly so. Petals unguiculate, the ample limb spreading. 
Filaments flattened ; anthers linear-sagittate. Pods slender, 
little compressed, either distinctly beaked or the stigma sub- 
sessile. Seeds oval, not winged or margined. 
* Leaves pinnate, the segments very narrow. 
1. S. FILIFOLIA. Cardamine filifolia, Greene, Pitt. i. 30. 
Arabis filifolia, Greene, Bull. Cal. Acad. ii. 390; Wats. in 
Gray, Syn. Fl. i. 159.—Species known only from Santa Cruz 
Island off the coast of California, where it was first collected 
by the present writer ten years since. 
2. S. PECTINATA. Arabis pectinata, Greene, Pitt. i. 287.— 
From the Bay of San Bartolomé on the peninsula of Lower 
California. 
9. S. ANGELORUM. Cardamine angelorum, Wats. Proc. Am. 
Acad. xxiv. 39.—This also is Lower Californian, but on the 
Gulf, or eastern shore of the peninsula, and farther north 
than the habitat of S. pectinata. Mr. Watson’s surmise as 
to the generic relationship of this species corresponds to 
what was my own impression when that which I now place 
as typical for the new genus first came to my notice. 
4. S. LAxa. Nasturtium (?) laxum, Wats. Proc. Am. Acad. 
xxiv. 39.—Inhabiting the same locality with the preceding ; 
the pods on rather long deflexed pedicels, and also slightly 
curved ; but the plant perfectly congeneric with the forego- 
ing; indeed quite like them in habit, except as being more 
weak and delicate. 
9. S. BRANDEGEANA. Sisymbrium Brandegeanum, Rose, 
U. 8. Herb. i. 10.—This is from the western shore of Lower 
California ; has the glaucous foliage of the other species, but 
es racemes are greatly elongated, the stem and few branches 
being floriferous from within a few inches of the root. The 
