Erigeron robustior

(Cronquist) G. L. Nesom

Sida 21: 21. 2004.

Common names: White cushion fleabane
Basionym: Erigeron decumbens subsp. robustior Cronquist Brittonia 6: 174. 1947
Synonyms: Erigeron decumbens var. robustior (Cronquist) Cronquist
Treatment appears in FNA Volume 20. Treatment on page 279. Mentioned on page 274, 275.
Revision as of 20:29, 16 December 2019 by FNA>Volume Importer

Perennials, (15–)25–55 cm (not colonial); taprooted, taproots thin (2–3 mm wide), caudices simple or with relatively slender and short, erect branches. Stems (often purplish) erect or decumbent, sparsely strigillose (basal cells inclined, hairs even-width), eglandular. Leaves basal (often withering by flowering) and cauline; basal blades (3-nerved) linear to narrowly oblanceolate, 90–170 × 3–7 mm, cauline gradually reduced distally, ending proximal to heads, margins entire, faces strigoso-hirsute, eglandular. Heads 1–3. Involucres 6–8.5 × (12–)14–20 mm. Phyllaries in 2–3(–4) series (narrowly oblanceolate to lanceolate, acute-acuminate), sparsely to moderately hirsute to villous, eglandular. Ray florets 21–36; corollas 7–15(–19) mm, laminae white to pinkish, not coiling or reflexing. Disc corollas 3.5–4.5 mm. Cypselae (1.8–)2–3.2 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 15–22 bristles.


Phenology: Flowering Jun–Jul.
Habitat: Rocky or gravelly slopes, sometimes over serpentine, glades and meadows, seeps, sagebrush-scrub, proximal montane coniferous forest
Elevation: (200–)700–1500 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Erigeron robustior"
Guy L. Nesom +
(Cronquist) G. L. Nesom +
Erigeron decumbens subsp. robustior +
White cushion fleabane +
(200–)700–1500 m +
Rocky or gravelly slopes, sometimes over serpentine, glades and meadows, seeps, sagebrush-scrub, proximal montane coniferous forest +
Flowering Jun–Jul. +
Erigeron decumbens var. robustior +
Erigeron robustior +
Erigeron +
species +