SAXIFRAGA MONTANENSIS n. sp.
Scaposc, perennial by a stout horizontal or ascending rootstock, coarse, stout, glandular-pilosc. Leaves basal, ovate or lanceolate, .5-1.5 cm. long, leathery, obtuse or acute, serrate-dentate, nearly sessile or apparently sessile on account of the broadly winged and dilated petiole ; scapes solitary, erect, 3-6 dm. tall, stout (6—ii mm. in diameter), paniculately branched above, the branches usually shorter than the internodes ; flowers greenish, almost I I mm. broad, in dense glomerate cymules ; calyx turbinate-cam panulate, 5-parted to below the middle, its tube adnate to the ovary, its segments triangular-ovate, obtuse, at length deflexed ; petals 5, greenish, lanceolate or linear, often slightly oblique, 3.5 mm. long, obtuse, 3-nerved, the lateral nerves arising below the middle, running close to the mid-nerve; filaments subulate, thrice shorter than the petals ; fruit not seen.
Southwestern Montana, in bogs at 1,85o meters elevation. Col lected by Mr. Frank Tweedy (No. 58), July, 1888. Also found by l'rof. F. D. Kelsey at Milian, Montana. The proposed species stands between Ser.rifraga Sierme and S. Pcmisylvanica. It differs from the former in its harsh pubescence which gives it a dull green color and in its comparatively small greenish flowers. From the latter it may be distinguished by its habit, its more or less turbinate calyx-tube and the calyx-segments, which are triangular ovate and about as long as the tube. In Saxifraga Penn.sylvanica the calyx-tube is campanulate, the segments ovate-lanceolate or ovate and twice as long as the tube. The petals of the new spe cies are oblanceolate or nearly linear, while those of its eastern relative are lanceolate or linear-lanceolate.