Purshia - Revision history

Raffi at 05:02, 10 December 2009

2009-12-10T05:02:05Z

Kpdhage at 14:07, 8 December 2009

2009-12-08T14:07:40Z

Envoy at 04:17, 4 May 2007

2007-05-04T04:17:38Z

New page

{{Taxobox
| color = lightgreen
| name = ''Purshia''
| image = Purshia tridentata 2.jpg
| image_width = 240px
| image_caption = ''Purshia tridentata''
| regnum = [[Plant]]ae
| divisio = [[Flowering plant|Magnoliophyta]]
| classis = [[Magnoliopsida]]
| ordo = [[Rosales]]
| familia = [[Rosaceae]]
| genus = '''''Purshia'''''
| genus_authority = [[Kurt Sprengel|Spreng.]]
| subdivision_ranks = Species
| subdivision = See text
}}

'''''Purshia''''' ('''bitterbrush''' or '''cliff-rose''') is a small genus of 5-8 species of [[flowering plant]]s in the family [[Rosaceae]], native to western [[North America]], where they grow in dry climates from southeast [[British Columbia]] in [[Canada]] south throughout the western [[United States]] to northern [[Mexico]].

They are [[deciduous]] or [[evergreen]] [[shrub]]s, typically reaching 0.3-5 m tall. The [[leaf|leaves]] are small, 1-3 cm long, deeply three- to five-lobed, with revolute margins. The [[flower]]s are 1-2 cm diameter, with five white to pale yellow or pink petals and yellow stamens. The [[fruit]] is a cluster of dry, slender, leathery [[achene]]s 2-6 cm long.

The evergreen species were treated separately in the genus '''''Cowania''''' in the past; this genus is still accepted by some botanists.

;Species
*''Purshia ericifolia'' - '''Heath Cliffrose'''. Texas.
*''Purshia glandulosa'' - '''Desert Bitterbrush'''. Nevada, Utah, Arizona.
*''Purshia mexicana'' - '''Mexican Cliffrose''' (syn. ''Cowania mexicana''). Mexico, Arizona.
*''Purshia pinkavae'' - '''[[D.J.Pinkava|Pinkava's]] Cliffrose'''. Arizona.
*''Purshia plicata'' - '''Antelope Bush''' (syn. ''Cowania plicata''). Mexico (Nuevo León).
*''Purshia stansburiana'' - '''Stansbury Cliffrose''' (syn. ''P. mexicana'' var. ''stansburiana'', ''Cowania stansburiana''). Idaho south to California, Arizona and New Mexico.
*''Purshia subintegra'' (possibly a [[hybrid]] between ''P. pinkavae'' and ''P. stansburiana''). Arizona.
*''[[Purshia tridentata]]'' - '''Antelope Bitterbrush'''. British Columbia south to California and New Mexico.

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>
Image:Purshia_tridentata_8234.jpg|''P. tridentata'', [[Lava Beds National Monument]]
Image:Purshia tridentata 1.jpg|''P. tridentata'', [[Red Rock Canyon]], Nevada
Image:Purshia tridentata 3.jpg|''P. tridentata'', Red Rock Canyon, Nevada
Image:Purshia tridentata 4.jpg|''P. tridentata'', Red Rock Canyon, Nevada
</gallery>

==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)
*[http://plants.usda.gov:8080/plants//profile?symbol=PURSH USDA Plants Profile: ''Purshia'']
*[http://www.ars-grin.gov/cgi-bin/npgs/html/splist.pl?10152 Germplasm Resources Information Network: ''Purshia'']
*[http://research.yale.edu/yoderlab/pdfs/2003,%20Eriksson%20et%20al,%20IJPS.pdf Phylogeny of Rosoideae (pdf file)]

[[Category:Rosaceae]]

@@ Line 1: / Line 1: @@
 {{SPlantbox
 |Min ht metric=cm
 |Temp Metric=°F
-|image=Upload.png
+|image=Purshia tridentata 2.jpg
 |image_width=240
 }}
 {{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.
 }}
@@ Line 33: / Line 19: @@
 The evergreen species were treated separately in the genus '''''Cowania''''' in the past; this genus is still accepted by some botanists.
-;Species
+Describe the plant here...
 *''Purshia ericifolia'' - '''Heath Cliffrose'''. Texas.
 *''Purshia glandulosa'' - '''Desert Bitterbrush'''. Nevada, Utah, Arizona.
@@ Line 44: / Line 41: @@
 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>
@@ Line 51: / Line 51: @@
 Image:Purshia tridentata 4.jpg|''P. tridentata'', Red Rock Canyon, Nevada
 </gallery>
 ==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)
+*{{wplink}}
-[[Category:Rosaceae]]
+{{stub}}

← Older revision		Revision as of 14:07, 8 December 2009
Line 1:		Line 1:
		+	{{SPlantbox
		+	\|Min ht metric=cm
		+	\|Temp Metric=°F
		+	\|image=Upload.png
		+	\|image_width=240
		+	}}
		+	{{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.
		+	Alfred Rehder.
		+	}}
		+
	{{Taxobox		{{Taxobox
	\| color = lightgreen		\| color = lightgreen