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{{SPlantbox
{{SPlantbox
|familia=Rosaceae
|genus=Purshia
|Min ht metric=cm
|Min ht metric=cm
|Temp Metric=°F
|Temp Metric=°F
|image=Upload.png
|image=Purshia tridentata 2.jpg
|image_width=240
|image_width=240
|image_caption=Purshia tridentata
}}
}}
{{Inc|
{{Inc|
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.
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. Var. glandulosa, Jones (P. glandulosa, Curran), is glandular and has very small, almost glabrous lvs., sometimes pinnately 5-lobed.
Alfred Rehder.
Alfred Rehder.
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}}
The evergreen species were treated separately in the genus '''''Cowania''''' in the past; this genus is still accepted by some botanists.
The evergreen species were treated separately in the genus '''''Cowania''''' in the past; this genus is still accepted by some botanists.
Describe the plant here...
==Cultivation==
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===Propagation===
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===Pests and diseases===
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==Species==
*''Purshia ericifolia'' - '''Heath Cliffrose'''. Texas.
*''Purshia ericifolia'' - '''Heath Cliffrose'''. Texas.
*''Purshia glandulosa'' - '''Desert Bitterbrush'''. Nevada, Utah, Arizona.
*''Purshia glandulosa'' - '''Desert Bitterbrush'''. Nevada, Utah, Arizona.
The classification of ''Purshia'' within the Rosaceae is presently unclear. The genus was originally placed in the subfamily [[Rosoideae]], and later in subfamily [[Dryadeae]] along with the genera ''[[Mountain-mahogany|Cercocarpus]]'', ''[[Chamaebatia]]'' and ''[[Dryas (plant)|''Dryas'']]'', all genera sharing [[root nodule]]s that host the [[nitrogen fixation|nitrogen-fixing]] [[bacterium]] ''[[Frankia]]''. However, recent genetic research indicates that Dryadeae may be polyphyletic, with ''Dryas'' not closely related to the other genera.
The classification of ''Purshia'' within the Rosaceae is presently unclear. The genus was originally placed in the subfamily [[Rosoideae]], and later in subfamily [[Dryadeae]] along with the genera ''[[Mountain-mahogany|Cercocarpus]]'', ''[[Chamaebatia]]'' and ''[[Dryas (plant)|''Dryas'']]'', all genera sharing [[root nodule]]s that host the [[nitrogen fixation|nitrogen-fixing]] [[bacterium]] ''[[Frankia]]''. However, recent genetic research indicates that Dryadeae may be polyphyletic, with ''Dryas'' not closely related to the other genera.
==Gallery==
{{photo-sources}}<!-- remove this line if there are already 3 or more photos in the gallery -->
<gallery>
<gallery>
Image:Purshia tridentata 4.jpg|''P. tridentata'', Red Rock Canyon, Nevada
Image:Purshia tridentata 4.jpg|''P. tridentata'', Red Rock Canyon, Nevada
</gallery>
</gallery>
==References==
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
<!--- xxxxx *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381 -->
<!--- xxxxx *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432 -->
<!--- xxxxx *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608 -->
==External links==
==External links==
*[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?Purshia Jepson Flora Project: ''Purshia''] (click 'next taxon' to see species accounts of Californian species)
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