Very dwarf, (2-3 inches high, from an annual root,) hispid throughout, even to the siliques; leaves cuneate or obovate-oblong, coarsely toothed or incised, the cauline-sessile but hardly at all clasping; raceme short and loosely flowered; pedicels spreading or at length recurved in flower (which is red or red-violet) but the linear compressed siliques (1½ inch long, a line wide,) are erect; stigma almost sessile; immature seeds winged.

Mt. Diablo, dry places near summit.

This ranks next to S. heterophyllus.

Viola L.

V. ocellata, Torr. and Gray, var.

Glabrous, smaller; leaves somewhat thickish; peduncles elongated. Very curious and distinct. From Tamalpais.

Arenaria L.

A. brevifolia Nutt.? var. Californica.

Much branched or diffuse, cymosely many-flowered; petals and sepals somewhat narrower.

Leaves as in Nuttall’s plant, thickish, plane, mostly obtuse and spreading. Valves of the capsule entire. Filaments opposite and twice the length of the sepals, more dilated and glandular at the base. Seeds minute, minutely muricate, turgid. The fruit and seed are known only from Frémont’s specimens communicated to Dr. Torrey (No. 284 of Coll. 1846,) from California, a taller and less diffuse form than that now collected by Prof. Brewer, and more like Nuttall’s, from Tatnall County, Georgia. But my original specimen of the latter little-known plant is too incomplete to make certain the identity; and the two are widely sundered in geographical station. Still no adequate characters yet appear to distinguish specifically. Prof. Brewer collected his plant April 18th, in the valleys among high ridges in Sonoma, where it abounded.