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Purshia (after F. T. Pursh, or Pursch, as is the original spelling of his name, 1774-1820; born at Grossenhain, in Saxony; traveled in this country and wrote a flora of North America). Syn., Kunzia. Rosaceae. Low deciduous spreading shrub, allied to Cercocarpus, with alternate, mostly fascicled, small, cuneate and tridentate lvs.: fls. solitary, yellowish; calyx-tube tubular; petals spatulate, 5; stamens numerous; pistils 1 or sometimes 2: fr. a pubescent leathery achene exceeding the persistent calyx. Of little ornamental value with its sparse grayish or bluish green foliage and its rather inconspicuous fls. and frs., and but rarely cult. Probably hardy as far north as Mass., requiring sunny position and well-drained soil; an excess of moisture, especially during the winter, proves fatal to it. Prop. by seeds and probably by layers. The only species is P. tridentata, DC. (Kunzia tridentata, Spreng.). Diffusely branched shrub, attaining 5, rarely 10 ft.: lvs. cuneate-obovate, 3-lobed at the apex, whitish pubescent beneath, 1/4-3/4in. long: fls. solitary on short branchlets, almost sessile, yellowish, about 3/4in. across: fr. ovate-oblong, acuminate. April-July. Ore. to Wyo., New Mex. and Calif. B.R. 1446. Var. glandulosa, Jones (P. glandulosa, Curran), is glandular and has very small, almost glabrous lvs., sometimes pinnately 5-lobed.
Alfred Rehder.
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