_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. CALANDRINIA H. B. & K. _C. Menziesii_, Hook. In various forms in southern California. Capsule slightly if at all exceeding the calyx; seeds rather turgid, shining; petals mostly much exceeding the calyx. _C. Menziesii, var. macrocarpa._ Stems and racemes at length more elongated and loosely-leaved; pedicels in fruit much spreading or recurved; capsule ovoid-fusiform, projecting beyond the calyx; seeds smaller, compressed and opaque. Dry hills of the Santa Inez mountains, near Santa Barbara. Perhaps a distinct species, but I want to see it confirmed by other specimens. LINUM L. _L. Breweri_, n. sp. Annual; glabrous; stem very small, not striate, with few flowers crowded at the apex; leaves filiform, smooth, alternate and opposite; stipules conspicuously glandular; pedicels shorter than the calyx; sepals oblong-ovate, acute, one-nerved, margin not scarious, glandular, less than half as long as the bright yellow, obovate-oblong petals; anthers elongated-oblong; sterile filaments almost wanting; styles three, distinct; stigma somewhat acutely pointed. Dry hill sides of the Diablo Range, near Marsh’s Ranch, May 29th. Plant barely two to three inches high, “but seen in the valley larger, with many flowers, not yet expanded.” This, like _L. Californicum_, appears to be uniformly tri-carpellary; flowers about the size of those of that species, and the anthers elongated-oblong; but the leaves narrower; the stigmas not at all capitate or enlarged, but minute and acute; fruit not seen. TRIFOLIUM, L. _T. bifidum_, n. sp.