Erigeron quercifolius |
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oak-leaf fleabane |
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Stems | erect to basally ascending (green proximally), proximally villous to villoso-hirsute, distally loosely strigose to hirsute, eglandular. |
Leaves | basal (persistent) and cauline; basal blades oblanceolate to obovate or spatulate, 15–110(–150) × 4–25(–30) mm, margins serrate or crenate to pinnately lobed, faces hirsute to villous, eglandular; cauline blades becoming oblong, gradually reduced distally (reduced to bracts or 0 proximal to arrays, clasping to subclasping). |
Involucres | 2.5–4 × 4.5–10 mm. |
Ray florets | 100–150; corollas usually blue, sometimes white to pink, 4–6 mm, laminae not coiling or reflexing. |
Disc corollas | 1.5–2.8 mm. |
Phyllaries | in (2–)3–4 series (sometimes basally connate), strigose to hirsuto-villous, eglandular or sparsely minutely glandular. |
Heads | (1–)4–16(–50) in corymbiform arrays (from branches distal to midstem). |
Cypselae | 0.6–0.9 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 10–15 bristles. |
Winter | annuals, biennials, or short-lived perennials, 10–60 cm; fibrous-rooted, caudices simple. |
2n | = 18. |
Erigeron quercifolius |
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Phenology | Flowering (Feb–)Mar–Jun. |
Habitat | Sandy sites, shell rock, roadsides, ditches, fields, areas of pine flatwoods |
Elevation | 0–15 m (0–0 ft) |
Distribution |
FL; GA; NC; SC; VA; West Indies (Bahama Islands)
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Discussion | Erigeron quercifolius is primarily of the Atlantic coastal plain. Putative records from Alabama westward to Texas are based on specimens of E. philadelphicus or E. tenuis. Erigeron tenuis sometimes closely approaches E. quercifolius in overall appearance; it is more closely related to E. strigosus. Convergent plants of E. tenuis differ from E. quercifolius in their non-clasping cauline leaves, lanceolate (versus oblanceolate to obovate) phyllaries, and slightly longer cypselae (1–1.2 mm versus 0.6–0.9 mm). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 320. |
Parent taxa | Asteraceae > tribe Astereae > Erigeron |
Sibling taxa | |
Name authority | Lamarck: in J. Lamarck and J. Poiret, Tabl. Encycl. 3: 258. (1796) |
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