SAXIFRAGA CLAYTONIAEFOLIA Canby n. sp.
Perennial by a short horizontal rootstock, slender, glandular pilose above, glabrate below. Leaves fleshy, orbicular-elliptic, more or less oblique, 6-io cm. long, glabrate, obtuse, entire, undu late, palmately six-eight-nerved, narrowed into a winged ribbed petiole which is as long as the blade or longer; scape erect or assurgent, 2-3 dm. tall, glabrate near the base, branched above ; infloresence thyrsoid-corymbose, its branches subtended by small linear or linear-oblong bracts ; flowers white, 4 mm. broad, each subtended by a small bractlet ; calyx flattish, 2 mm. high, its seg ments spreading and recurved, thin, oblong, acute, 3-nerved, longer than the tube ; petals spatulate or obovate-spatulate, 2 mm. long, slightly emarginate or minutely apiculate, gradually narrowed into a claw, marked with a stout midnerve which gives off two lateral nerves about the middle ; filaments subulate, shorter than the petals, incurved at the summit ; follicles (each) ovoid, 3 mm.
long, the short stout styles spreading at an angle of or more ; seeds irregularly oblong, .7 mm. long, reddish, smooth, or very faintly striate.
Damp crevices of rocks, The Dalles, Oregon. Collected by Frank Tweedy, May, 1883.
I have taken up a specific name attached to a specimen, by Mr. Canby, preserved in the Canby Herbarium, now at the Col lege of Pharmacy, New York. The form is without doubt an excellent species, differing from the related Safifraga integrifolia by its leaves, which closely resemble those of a broad-leaved Clay tonia, its flat calyx-tube, its oblong calyx-segments and its spatu late or obovate-spatulate petals, which are only 3-nerved and either notched or apiculate at the apex.