Erigeron tenuisTorrey & A. Gray [family ASTERACEAE ] (stored under name); Verified by Torrey & A. Gray, 1842
Related name
Erigeron quercifolius
Erigeron tenuis
Erigeron brazoensis
Common name
Slender-leaf fleabane, Flora of North America Vol. 20
Flora
Entry for Erigeron tenuis Torrey & A. Gray [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 20,
Names
Erigeron tenuisTorrey & A. Gray [family COMPOSITAE], Fl. N. Amer., 2: 175. 1841
Past names
tenue
Treatment Author(s)
Guy L. Nesom
Information
Biennials or short-lived perennials, 10–45 cm; fibrous-rooted, caudices simple. Stems ascending (usually reddish proximally, branched distally), strigose, rarely hirsute proximally, eglandular. Leaves basal (commonly persistent) and cauline; basal blades oblanceolate to obovate or spatulate, 20–100(–130) × 4–20 mm, margins serrate or crenate to pinnately lobed, faces sparsely hirsute to strigoso-hirsute (hairs ascending), eglandular; cauline becoming narrower and entire (bases not clasping or subclasping), abruptly reduced near midstem. Heads (1–)3–20(–60) in loosely corymbiform arrays (usually from branches beyond midstem). Involucres (2–)2.5–4 × 5–10 mm. Phyllaries in 2–4 series, sparsely strigose, eglandular. Ray florets 60–120; corollas blue to pale lavender or white, drying blue to purplish, 3–5 mm, laminae not coiling or reflexing. Disc corollas 2–2.7 mm. Cypselae 1–1.2 mm, 2(–4)-nerved, faces sparsely strigose; pappi: outer of setae, inner of 11–15 bristles.
Phenology
mar-may (spring), jun (summer), nov (fall)
Altitude range
10–200 m;
Distribution
USA Ala.USA Ark.USA Fla.USA Kans.USA La.USA Miss.USA Mo.USA Okla.USA Tex.
Discussion
A plant reported as Erigeron tenuis disjunct in North Carolina is perhaps better identified as E. strigosus: pappus bristles on the ray cypselae are reduced and variable in number.