radical leaves on long petioles capillaceo-multi-partite, bi-tri-pinnate, the pinnæ and pinnules petiolulate, filiform, very long and slender, channelled above, almost quite glabrous; stipules broadly subulate, much acuminate, rigid, pubescent; scape longer than the leaves, angular; bracts, pedicels and calyx-tubes lanuginous, cal. segments lanceolate, half as long as the obovate petals. Stem an inch or two long, leafy at the crown. Leaves 8–16 inches long, the petiole as long; the lamina cut into filiform shreds, sometimes setaceous, sometimes twice or thrice as thick, always very long and entire. The specimens, with slender leaf-lobes, are quite glabrous, the others have a few scattered hairs. These latter approach P. anethifolium in aspect, but differ decidedly in the stipules and other characters. The petals are pale, spotless, and of thinner substance than usual in this group. The broad-stamen is taper-pointed, or semi-lanceolate.
