Agoseris aurantiaca var. purpurea
Rhodora50: 33. 1948
Phenology: Flowering Jun–Sep.
Habitat: Moist, subalpine meadows and forests to alpine tundra, often disturbed areas
Elevation: 1800–3600 m
Variety purpurea is known mainly from the Colorado Plateau and southern Rocky Mountains. The two varieties are partially sympatric in the mountains of Colorado, Utah, southern Wyoming, and northern New Mexico, var. aurantiaca occurring only at very high elevations in that region. Wherever var. purpurea and var. aurantiaca occur together, they intergrade. Hybrids between var. purpurea and A. glauca or A. parviflora occur. One hybrid has been named (as a species): Agoseris aurantiaca var. purpurea × A. glauca var. dasycephala (= A. ×montana Osterhout) occurs sporadically at high elevations in the Rocky Mountains of Colorado.
Variety purpurea tends to exhibit a higher frequency of yellow-flowered populations than var. aurantiaca. Plants of var. purpurea from the Rocky Mountains usually have orange corollas; those from the plateaus of southern Utah and northern Arizona often have yellow corollas. These more southwestern populations have been called A. arizonica (or A. purpurea var. arizonica); the two regional phases cannot be adequately separated and their segregation is arbitrary.
|Author||Gary I. Baird +|
|Basionym||Macrorhynchus purpureus +|
|Common name||Colorado Plateau agoseris +|
|Elevation||1800–3600 m +|
|Habitat||Moist, subalpine meadows and forests to alpine tundra, often disturbed areas +|
|Illustrator||Yevonn Wilson-Ramsey +|
|Phenology||Flowering Jun–Sep. +|
|Synonym||Agoseris arizonica +, Agoseris attenuata +, Agoseris aurantiaca purpurea +, Agoseris confinis +, Agoseris frondifera +, Agoseris glauca cronquistii +, Agoseris graminifolia +, Agoseris longirostris +, Agoseris purpurea +, Agoseris purpurea arizonica +, Agoseris roseata + and Agoseris rostrata +|
|Taxon name||Agoseris aurantiaca var. purpurea +|
|Taxon parent||Agoseris aurantiaca +|
|Taxon rank||variety +|
|Volume||Volume 19 +|