Erigeron flagellaris |
|
---|---|
trailing fleabane, whiplash daisy |
|
Stems | first erect (greenish proximally; usually single, simple), then producing herbaceous, leafy, prostrate runners (usually with rooting plantlets at tips, populations often becoming clonal mats), strigose (often sparsely; hairs antrorsely appressed, consistent in orientation), sometimes slightly glandular distally. |
Leaves | basal (often persistent) and cauline; basal blades broadly oblanceolate to elliptic, 20–55 × 3–9 mm; cauline abruptly reduced distally, margins entire or dentate, faces strigose, eglandular. |
Involucres | 3–5 × 6–13 mm. |
Ray florets | 40–125; corollas white, often with an abaxial midstripe, often drying lilac, 4–10 mm, laminae not coiling or reflexing. |
Disc corollas | 2–3.5 mm. |
Phyllaries | in 2–3 series, strigose to loosely hirsute, minutely glandular. |
Heads | 1(–3, on proximal branches). |
Cypselae | 0.8–1.3 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 10–17 bristles. |
Biennuals | or short-lived perennials, 3–15 cm; usually fibrous-rooted, sometimes taprooted, caudices lignescent, rarely branched. |
2n | = 18, 27, 36, 45, 54. |
Erigeron flagellaris |
|
Phenology | Flowering May–Aug(–Sep). |
Habitat | Meadows and grassy slopes, often moist, open areas in grasslands, pinyon pine, oak-pine, pine, aspen, and spruce-fir |
Elevation | (1700–)2100–3600 m ((5600–)6900–11800 ft) |
Distribution |
AZ; CA; CO; ID; KS; MT; ND; NE; NM; NV; OK; OR; SD; TX; UT; WA; WY; AB; BC; Mexico
|
Discussion | Early season forms of Erigeron flagellaris may consist of a basal rosette and a single, erect, scapiform, monocephalous stem; leafy runners usually develop quickly. Many polyploids of this species are indistinguishable from diploids; some polyploids have features suggestive of genetic influence of E. tracyi. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 341. |
Parent taxa | Asteraceae > tribe Astereae > Erigeron |
Sibling taxa | |
Synonyms | E. nudiflorus |
Name authority | A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 68. (1849) |
Web links |