Symphyotrichum walteri

(Alexander) G. L. Nesom

Phytologia 77: 294. 1995

Common names: Walter’s aster
Basionyms: Aster walteri Alexander in J. K. Small, Man. S.E. Fl., 1382, 1509. 1933,
Synonyms: Lasallea walteri (Alexander) Semple & Brouillet Virgulus walteri (Alexander) Reveal & Keener
Treatment appears in FNA Volume 20. Treatment on page 492. Mentioned on page 472, 474, 483.

Perennials, 20–100 cm, colonial or cespitose, eglandular, sometimes sparsely, minutely stipitate-glandular; long-rhizomatous, with erect, thick, ± cormoid, woody caudices. Stems 1–5+, erect to scandent-sprawling (mid to dark brown, branched from middle), glabrous or very sparsely fine strigose. Leaves (bright green) thick, firm, ± succulent, margins entire; basal early deciduous, sessile, blades (3-nerved) oblanceolate to obovate, 10–43 × 7–15 mm, bases cuneate, margins scabrous, apices obtuse, mucronate, faces sparsely finely scabrous; proximal cauline sessile (patent to reflexed), blades ovate to lanceolate, 8–30 × 2–10 mm, bases cordate-clasping, apices acute, sometimes spinulose, faces finely scabrous, shiny; distal sessile, blades lanceolate to triangular, 5–15 × 2.5–3.5 mm, reduced to bracts distally, bases clasping, margins finely scabrous, apices acute, white-spinulose, faces finely scabrous. Heads borne singly in diffusely paniculiform arrays, branches initially patent to divaricate, elongate. Peduncles glabrous, bracts relatively numerous, tiny, foliaceous, becoming minute, linear, glabrous. Involucres campanulate, 5–7 mm. Phyllaries in 4–5 series, oblanceolate, strongly unequal, bases (tan) ± indurate, margins hyaline, finely scabrous, green zones diamond-shaped, in distal 1/4–1/2, apices obtuse, mucronate to finely subspinulose, innermost acuminate, faces sparsely strigillose (often obscured by thick, shiny cuticle). Ray florets 11–26; corollas bluish purple, laminae 5–9(–11) × 0.5–1 mm. Disc florets (6–)15–25(–30); corollas yellow, 4–6.5 mm, throats narrowly funnelform, lobes triangular, 0.4–0.8 mm. Cypselae tan to brown, obovoid, not compressed, 2–2.5 mm, nerves very faint, faces sparsely to moderately strigose; pappi tan, 4–6 mm. 2n = 20.


Phenology: Flowering Oct–Dec.
Habitat: Sandy, clayey soils, margins of woods, open oak-pine scrub, pine flatwoods, fields, roadsides
Elevation: 0–100+ m

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Symphyotrichum walteri"
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Alexander) G. L. Nesom +
Aster walteri +
Walter’s aster +
Fla. +, Ga. +, N.C. +  and S.C. +
0–100+ m +
Sandy, clayey soils, margins of woods, open oak-pine scrub, pine flatwoods, fields, roadsides +
Flowering Oct–Dec. +
Lasallea walteri +  and Virgulus walteri +
Symphyotrichum walteri +
Symphyotrichum subg. Virgulus +
species +