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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
from FNA
AL; FL; GA; LA; MS
[WildflowerSearch map]
[BONAP county map]
from FNA
FL; GA; NC; SC
[WildflowerSearch map]
[BONAP county map]
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
S. anomalum, S. anticostense, S. ascendens, S. boreale, S. bracteolatum, S. campestre, S. chapmanii, S. chilense, S. ciliatum, S. ciliolatum, S. concolor, S. cordifolium, S. cusickii, S. defoliatum, S. depauperatum, S. drummondii, S. dumosum, S. elliottii, S. ericoides, S. eulae, S. falcatum, S. fendleri, S. firmum, S. foliaceum, S. fontinale, S. frondosum, S. georgianum, S. grandiflorum, S. greatae, S. hallii, S. hendersonii, S. jessicae, S. laeve, S. lanceolatum, S. lateriflorum, S. laurentianum, S. lentum, S. molle, S. nahanniense, S. novae-angliae, S. novi-belgii, S. oblongifolium, S. ontarionis, S. oolentangiense, S. parviceps, S. patens, S. phlogifolium, S. pilosum, S. plumosum, S. porteri, S. potosinum, S. praealtum, S. pratense, S. prenanthoides, S. priceae, S. puniceum, S. pygmaeum, S. racemosum, S. retroflexum, S. rhiannon, S. robynsianum, S. sericeum, S. shortii, S. simmondsii, S. spathulatum, S. subspicatum, S. subulatum, S. tenuifolium, S. tradescantii, S. turbinellum, S. undulatum, S. urophyllum, S. walteri, S. welshii, S. yukonense, S. ×amethystinum
S. adnatum, S. anomalum, S. anticostense, S. ascendens, S. boreale, S. bracteolatum, S. campestre, S. chapmanii, S. chilense, S. ciliatum, S. ciliolatum, S. concolor, S. cordifolium, S. cusickii, S. defoliatum, S. depauperatum, S. drummondii, S. dumosum, S. elliottii, S. ericoides, S. eulae, S. falcatum, S. fendleri, S. firmum, S. foliaceum, S. fontinale, S. frondosum, S. georgianum, S. grandiflorum, S. greatae, S. hallii, S. hendersonii, S. jessicae, S. laeve, S. lanceolatum, S. lateriflorum, S. laurentianum, S. lentum, S. molle, S. nahanniense, S. novae-angliae, S. novi-belgii, S. oblongifolium, S. ontarionis, S. oolentangiense, S. parviceps, S. patens, S. phlogifolium, S. pilosum, S. plumosum, S. porteri, S. potosinum, S. praealtum, S. pratense, S. prenanthoides, S. priceae, S. puniceum, S. pygmaeum, S. racemosum, S. retroflexum, S. rhiannon, S. robynsianum, S. sericeum, S. shortii, S. simmondsii, S. spathulatum, S. subspicatum, S. subulatum, S. tenuifolium, S. tradescantii, S. turbinellum, S. undulatum, S. urophyllum, S. welshii, S. yukonense, S. ×amethystinum
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)
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