Difference between revisions of "Erigeron decumbens"
Trans. Amer. Philos. Soc., n. s. 7: 309. 1840.
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|common_names=Willamette fleabane | |common_names=Willamette fleabane | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }}{{Treatment/ID/Special_status | ||
| + | |code=C | ||
| + | |label=Conservation concern | ||
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name=Erigeron decumbens | name=Erigeron decumbens | ||
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|authority=Nuttall | |authority=Nuttall | ||
|rank=species | |rank=species | ||
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|publication title=Trans. Amer. Philos. Soc., n. s. | |publication title=Trans. Amer. Philos. Soc., n. s. | ||
|publication year=1840 | |publication year=1840 | ||
| − | |special status= | + | |special status=Endemic;Conservation concern |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_565.xml |
|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Erigeron | |genus=Erigeron | ||
Latest revision as of 20:04, 5 November 2020
Perennials, 5–60 cm (colonial); taprooted, caudex branches rhizomelike plants. Stems (often purplish) erect or decumbent at bases, sparsely strigillose (basal cells inclined, hairs even-width), eglandular. Leaves basal (often withering by flowering) and cauline; basal blades linear to narrowly oblanceolate, 50–120(–180) × 3–6(–11) mm, cauline 3-nerved, gradually reduced distally, margins entire, faces hirtellous, eglandular. Heads (1–)2–5(–18) borne singly or in loosely corymbiform arrays. Involucres (4.5–)5–6 × 9–12 mm. Phyllaries in 2–3(–4) series (linear-lanceolate, apices linear-acuminate), sparsely to moderately villous, eglandular. Ray florets 26–57; corollas white to bluish, sometimes drying pinkish to pale blue, 7–12 mm, laminae not coiling or reflexing. Disc corollas 3–3.5 mm. Cypselae 1.2–1.6 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of (6–)12–16 bristles.
Phenology: Flowering May–Jul.
Habitat: Heavy soils in seasonally wet or dry upland prairie grasslands
Elevation: 100–300 m
Discussion
Of conservation concern.
Erigeron decumbens is in the Center for Plant Conservation’s National Collection of Endangered Plants.
Selected References
None.