Difference between revisions of "Erigeron sionis var. trilobatus"

(Maguire ex Cronquist) S. L. Welsh

Rhodora 95: 398. 1993.

Basionym: Erigeron flagellaris var. trilobatus Maguire ex Cronquist Brittonia 6: 258. 1947
Synonyms: Erigeron proselyticus G. L. Nesom
Treatment appears in FNA Volume 20. Treatment on page 344. Mentioned on page 343.
FNA>Volume Importer
FNA>Volume Importer
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Revision as of 18:44, 24 September 2019

Basal leaves: blades (2–)3–5(–11) mm wide, margins usually entire or dentate, rarely deeply lobed. Ray corollas drying pink to dark blue. 2n = 18.


Phenology: Flowering Jul–Sep.
Habitat: Limestone cliff bases and faces, crevices, ledges, shelves, soil accumulations, talus, limestone gravel, lakeshores, bristlecone pine, spruce-fir-aspen, aspen, limber pine, Engelmann spruce
Elevation: 2200–3100 m

Discussion

Of conservation concern.

The leaves of var. sionis tend to be narrower and more deeply lobed than those of var. trilobatus; morphologic intermediacy makes these plants hard to separate even at varietal rank. Differences in habitat and an essentially allopatric distribution, however, suggest that two evolutionary entities are present.

Selected References

None.

Lower Taxa

None.
Guy L. Nesom +
(Maguire ex Cronquist) S. L. Welsh +
Erigeron flagellaris var. trilobatus +
2200–3100 m +
Limestone cliff bases and faces, crevices, ledges, shelves, soil accumulations, talus, limestone gravel, lakeshores, bristlecone pine, spruce-fir-aspen, aspen, limber pine, Engelmann spruce +
Flowering Jul–Sep. +
Illustrated +, Endemic +  and Conservation concern +
Erigeron proselyticus +
Erigeron sionis var. trilobatus +
Erigeron sionis +
variety +