Symphyotrichum adnatum |
Symphyotrichum walteri |
|
---|---|---|
scaleleaf aster |
Walter's aster |
|
Habit | Perennials, 30–120 cm, cespitose; with herbaceous or thick, woody, sometimes cormoid caudices. | Perennials, 20–100 cm, colonial or cespitose, eglandular, sometimes sparsely, minutely stipitate-glandular; long-rhizomatous, with erect, thick, ± cormoid, woody caudices. |
Stems | 5+, erect to scandent-sprawling (brown, branched from middle), moderately to densely finely hairy. |
1–5+, erect to scandent-sprawling (mid to dark brown, branched from middle), glabrous or very sparsely fine strigose. |
Leaves | (yellowish green) thick, firm, margins entire; basal early deciduous, sessile or subpetiolate, blades (3-nerved) oblanceolate to obovate, 10–43 × 7–15 mm, bases cuneate, margins scabrous, apices acute to obtuse, faces sparsely finely scabrous; proximal cauline sessile, blades narrowly obovate to oblanceolate, 20–35 × 5–13 mm, bases auriculate-clasping, margins finely scabrous, apices acute to obtuse, faces finely scabrous, shiny; distal sessile, blades lanceolate to linear, 3–10 × 1–4 mm, gradually reduced to bracts distally, bases subclasping and adnate to stem for 1/2+ length, apices narrowly acute, white-spinulose, faces finely scabrous, viscid, minutely stipitate-glandular. |
(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. |
Peduncles | densely short-strigose, glandular, bracts linear, adnate, densely short-strigose. |
glabrous, bracts relatively numerous, tiny, foliaceous, becoming minute, linear, glabrous. |
Involucres | campanulate, 4–6.5 mm. |
campanulate, 5–7 mm. |
Ray florets | 10–20; corollas light to dark lavender, laminae 5–8 × 0.5–1.5 mm. |
11–26; corollas bluish purple, laminae 5–9(–11) × 0.5–1 mm. |
Disc florets | 12–25; corollas yellow, 3.7–7 mm, throats narrowly funnelform, lobes triangular, 0.4–0.8 mm. |
(6–)15–25(–30); corollas yellow, 4–6.5 mm, throats narrowly funnelform, lobes triangular, 0.4–0.8 mm. |
Phyllaries | in 4–5 series, oblong to oblanceolate, strongly unequal, bases (tan) ± indurate, margins hyaline, finely scabrous, green zones lenticular, in distal 1/4–2/5, apices obtuse, mucronate to finely subspinulose, faces scabrellous-puberulent, stipitate-glandular. |
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). |
Heads | in ± open, paniculiform arrays, branches initially patent then ascending or divaricate. |
borne singly in diffusely paniculiform arrays, branches initially patent to divaricate, elongate. |
Cypselae | tan to brown, obovoid, not compressed, 2–2.5 mm, 6–10-nerved (faint), faces sparsely strigose; pappi tan, 3.75–8 mm. |
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. |
= 20. |
Symphyotrichum adnatum |
Symphyotrichum walteri |
|
Phenology | Flowering Oct–Dec. | Flowering Oct–Dec. |
Habitat | Sandy, clayey soils, sandhills, oak-pine scrub, open pine flatwoods, roadsides | Sandy, clayey soils, margins of woods, open oak-pine scrub, pine flatwoods, fields, roadsides |
Elevation | 0–100+ m (0–300+ ft) | 0–100+ m (0–300+ ft) |
Distribution |
AL; FL; GA; LA; MS
|
FL; GA; NC; SC
|
Source | FNA vol. 20, p. 491. | FNA vol. 20, p. 492. |
Parent taxa | Asteraceae > tribe Astereae > Symphyotrichum > subg. Virgulus | Asteraceae > tribe Astereae > Symphyotrichum > subg. Virgulus |
Sibling taxa | ||
Synonyms | Aster adnatus, Lasallea adnata, Virgulus adnatus | Aster walteri, Lasallea walteri, Virgulus walteri |
Name authority | (Nuttall) G. L. Nesom: Phytologia 77: 275. (1995) | (Alexander) G. L. Nesom: Phytologia 77: 294. (1995) |
Web links |