''Erigeron subtrinervis'', called the three-nerved daisy,
[ the three-nerve fleabane,][ or the hairy showy daisy,][Lady Bird Johnson Wildflower Center, University of Texas, ''Erigeron subtrinervis'' Rydb. ex Porter & Britton Three-nerve fleabane, Hairy showy daisy]
/ref> is a North American species of flowering plants in the family Asteraceae. It grows in various mountains of western Canada and the western United States: Rocky Mountains, northern Cascades, Black Hills, etc., from British Columbia and Washington state east to North Dakota and south as far as New Mexico.Biota of North America Program 2014 county distribution map
/ref>[Turner Photographics, Wildflowers of the Pacific Northwest, ''Erigeron subtrinervis'', Three-Nerved Daisy]
photos, description, distribution map for Oregon, Washington, and southern British Columbia
''Erigeron subtrinervis '' grows in openings and along roadsides in aspen groves and conifer forests, as well as on ridges and mountain peaks at high elevations. It is a perennial herb up to 90 cm (3 feet) tall, producing underground rhizomes
In botany and dendrology, a rhizome (; , ) is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow hori ...
and a woody caudex
A caudex (plural: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695
In the strict sense of the term, meaning a stem, "caudex" is m ...
. The inflorescence generally contains 1-21 flower heads per stem, in a flat-topped array. Each head
A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple animals may ...
contains 100–150 purple or lavender ray florets surrounding many yellow disc florets.[Flora of North America, ''Erigeron subtrinervis'' Rydberg ex Porter & Britton, 1894. ]
/ref>
References
External links
subtrinervis
Flora of Northern America
Plants described in 1864
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