Agoseris ×elata
Pittonia2: 177. 1891
Phenology: Flowering Jun–Sep.
Habitat: Lowland prairies
Elevation: 10–100 m
Distribution
Discussion
Agoseris ×elata has been and continues to be an enigmatic taxon. Perhaps no other name in the genus has been so misunderstood and misapplied. Many herbarium specimens labeled A. ×elata are in fact misidentified. Specimens of A. ×elata are not abundant in herbaria; the number of actual collections is relatively small compared to those for other Agoseris. Specimens that belong to A. ×elata represent a complex assemblage that has relatively few defining features and appears to be of hybrid origin. Most specimens appear to be intermediate between A. grandiflora and A. aurantiaca; most also appear to have characteristics of A. monticola or A. glauca var. dasycephala. The exact parentage remains unclear.
Agoseris ×elata occurs in two geographically separated populations, which cannot be consistently distinguished morphologically: one mainly in scattered lowland prairie locations in the Puget Sound and Willamette Valley areas (the type collection came from this popula tion; no new collections have been taken from this region in over 65 years; it is likely extirpated) and another at high elevations in California, primarily in the Lake Tahoe region and southward in the Sierra Nevada.
References
None.
Author | Gary I. Baird + |
Basionym | Stylopappus elatus + |
Common name | Willamette agoseris + |
Elevation | 10–100 m + |
Habitat | Lowland prairies + |
Illustrator | Yevonn Wilson-Ramsey + |
Phenology | Flowering Jun–Sep. + |
Reference | None + |
Synonym | Agoseris grandiflora laciniata +, Agoseris laciniata +, Agoseris tenuifolia +, Stylopappus laciniatus +, Stylopappus laciniatus longifolius +, Troximon grandiflorum laciniatum +, Troximon grandiflorum tenuifolium + and Troximon nuttallii + |
Taxon name | Agoseris ×elata + |
Taxon parent | Agoseris + |
Taxon rank | species + |
Volume | Volume 19 + |