Symphyotrichum subulatum var. parviflorum

(Nees) S. D. Sundberg

Sida 21: 907. 2004.

Common names: Southwestern annual saltmarsh aster
Basionym: Tripolium subulatum var. parviflorum Nees Gen. Sp. Aster., 157, 286. 1833
Synonyms: Aster subulatus var. cubensis (de Candolle) Shinners Erigeron expansus Poeppig ex Sprengel Symphyotrichum expansum (Poeppig ex Sprengel) G. L. Nesom
Treatment appears in FNA Volume 20. Treatment on page 482. Mentioned on page 481.

Plants (10–)70–150 cm. Stems usually simple, often with short, leafy branches proximally. Heads 20–100, in open, diffuse arrays, primary branches longer than peduncles. Involucres 5–6.2 mm. Phyllaries 30–42, sub-ulate to lanceolate, narrow, green zones narrowly lanceolate. Ray florets (23–)27–37(–42) in (1–)2 series; laminae usually white, sometimes pink, 1.9–3 × 0.2–0.5 mm, longer than pappi, drying in 1–2 coils (apices shallowly to deeply lobed). Disc florets (6–)8–15; corollas 3.4–4.4(–4.7) mm. Cypselae 1.5–2.7 mm; pappi 3.5–3.8(–4.2) mm. 2n = 10.


Phenology: Flowering Jul–Nov(–Jan).
Habitat: Roadsides, marshy habitats, often weedy
Elevation: 0–1100(–4000) m

Distribution

V20-1083-distribution-map.gif

Ala., Ariz., Calif., Fla., Nev., N.Mex., Okla., Tex., Utah, Mexico, West Indies, Central America, n South America, introduced in Asia (Japan), Pacific Islands (Hawaii).

Discussion

Selected References

None.

Lower Taxa

None.
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Nees) S. D. Sundberg +
Tripolium subulatum var. parviflorum +
Southwestern annual saltmarsh aster +
Ala. +, Ariz. +, Calif. +, Fla. +, Nev. +, N.Mex. +, Okla. +, Tex. +, Utah +, Mexico +, West Indies +, Central America +, n South America +, introduced in Asia (Japan) +  and Pacific Islands (Hawaii). +
0–1100(–4000) m +
Roadsides, marshy habitats, often weedy +
Flowering Jul–Nov(–Jan). +
Aster subulatus var. cubensis +, Erigeron expansus +  and Symphyotrichum expansum +
Symphyotrichum subulatum var. parviflorum +
Symphyotrichum subulatum +
variety +