Erigeron Subtrinervis, Threenerve Fleabane
Plants > Wildflowers > Asteraceae > Erigeron Subtrinervis
Common names:
Threenerve fleabane, showy daisy
Family:
Scientific name:
Erigeron subtrinervis
Main flower color:
Range:
The Pacific Northwest and the Rocky Mountain states, plus some adjacent areas
Height:
Up to 3 feet
Habitat:
Forest margins, woodland openings, roadsides, other partly shaded locations in mountainous areas
Leaves:
Oblanceolate at the base, lanceolate along the stem, up to 3 inches long. Small hairs along the edge and on the surface
Season:
June to September
Leaves of erigeron subtrinervis grow at the base and quite densely along the stem, in an alternate arrangement, but the former tend to be withered at flowering. Leaves have fine hairs along the margins and on both surfaces, in contrast to the essentially hairless leaves of the similar erigeron speciosus. Another distinguishing factor is that leaves of erigeron subtrinervis have three veins (nerves); the central one is prominent, the two at either side rather less so.
Flower heads have between 100 and 150 ray florets, colored pale blue, pale purple or lavender. They form branched, corymbiform arrays; flowers lower down the main stem have longer stalks, so all attain a similar height. A plant may have a single flower, or as many as 21.
Flower heads have between 100 and 150 ray florets, colored pale blue, pale purple or lavender. They form branched, corymbiform arrays; flowers lower down the main stem have longer stalks, so all attain a similar height. A plant may have a single flower, or as many as 21.
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