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''Ericameria parryi'' (syn. ''Chrysothamnus parryi'') is a species of flowering plant in the aster family known by the common name Parry's rabbitbrush. It is native to much of the western United States.〔(''Ericameria parryi''. ) Flora of North America.〕〔McArthur, E. D. and J. R. Taylor. (''Chrysothamnus parryi''. ) Wildland Shrubs of the United States and its Territories: Thamnic Descriptions. USDA, Rocky Mountain Research Station, Shrub Sciences Laboratory.〕 This plant is quite variable, with certain characters defining each of its many varieties. In general, it is a shrub producing several upright stems reaching 10 centimeters to one meter tall, but usually not reaching that height. The branches are coated in a fuzz of white or greenish fibers. The leaves are linear to spatula-shaped and measure one to 8 centimeters long. The leaves are hairless to quite hairy or woolly in texture, and they may be glandular and sticky. The inflorescence is often a mass of many flower heads, but sometimes the heads are solitary. Each head has up to 20 yellow disc florets. There are no ray florets. The fruit is an achene up to 8 millimeters long tipped with a whitish or brown pappus up to 7.5 millimeters in length.〔〔 Flowering occurs mostly in July through September, and the achenes develop and disperse in the fall and into the winter. The seed is wind-dispersed. The plant's lifespan is 15 to 20 years.〔 This hardy plant occupies several habitat types. It can be found in mountains and foothills and its population will often increase upon environmental disturbance, such as grazing.〔 There are at least 12 varieties:〔 *''E. parryi'' var. ''affinis'' - limited to Colorado, New Mexico,〔(''Ericameria parryi''. ) USDA PLANTS Profile.〕 and Arizona〔 *''E. parryi'' var. ''aspera'' - (rough rabbitbrush) limited to California and Nevada *''E. parryi'' var. ''attenuata'' - (narrow-bract rabbitbrush) *''E. parryi'' var. ''howardii'' - (Howard’s rabbitbrush) in and east of the Rocky Mountains *''E. parryi'' var. ''imula'' - (low rabbitbrush) small-statured variety endemic to San Bernardino County, California,〔 around Bear Valley〔(''E. parryi'' var. ''imula''. ) ''The Jepson Manual''.〕 *''E. parryi'' var. ''latior'' - (broadleaf rabbitbrush) limited to northern California *''E. parryi'' var. ''monocephala'' - (one-headed rabbitbrush) common in the Sierra Nevada of eastern California and western Nevada *''E. parryi'' var. ''montana'' - (mountain rabbitbrush) small plant known only from the Red Conglomerate Peaks of Idaho and Montana *''E. parryi'' var. ''nevadensis'' - (Nevada rabbitbrush) *''E. parryi'' var. ''parryi'' - widespread in interior west *''E. parryi'' var. ''salmonensis'' - (Salmon River rabbitbrush) endemic to Idaho, where it grows along the Salmon River *''E. parryi'' var. ''vulcanica'' - (Vulcan rabbitbrush) uncommon, small variety endemic to the Sierra Nevada of California ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ericameria parryi」の詳細全文を読む スポンサード リンク
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