Symphyotrichum concolor |
Symphyotrichum adnatum |
|||||
---|---|---|---|---|---|---|
eastern silver American-aster, eastern silver aster, eastern silvery aster |
scaleleaf aster |
|||||
Habit | Perennials, 30–80 cm, cespitose; with cormoid, woody caudices. | Perennials, 30–120 cm, cespitose; with herbaceous or thick, woody, sometimes cormoid caudices. | ||||
Stems | 1–10+, ascending to erect (light to dark brown), glabrous or densely canescent distally. |
5+, erect to scandent-sprawling (brown, branched from middle), moderately to densely finely hairy. |
||||
Leaves | (green to graysih) soft to firm; basal withering by flowering, sessile, blades (1–3-nerved) elliptic-lanceolate, 10–43 × 5–15 mm, bases attenuate, margins usually entire, rarely remotely serrate, piloso-ciliate, apices acute to obtuse, faces silvery silky-pilose to sparsely pilose; proximal cauline withering by flowering, sessile, blades oblanceolate, 20–35 × 5–15 mm, bases rounded, subclasping, margins entire, scabrous to silky-pilose, apices acute to obtuse, cuspidate mucronate, faces ± densely silky; distal sessile, blades usually oblong to lanceolate, rarely ovate, 9–15 × 1.8–5 mm, reduced distally, bases cuneate, margins entire, apices acute, mucronate, faces ± densely silky or sparsely strigose, sometimes glabrate (var. devestitum). |
(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. |
||||
Peduncles | densely hairy, bracts becoming linear, grading into phyllaries. |
densely short-strigose, glandular, bracts linear, adnate, densely short-strigose. |
||||
Involucres | campanulate to narrowly campanulate, 5–7 mm. |
campanulate, 4–6.5 mm. |
||||
Ray florets | 8–12; corollas rose-purple, rarely white, laminae 4–9 × 1–1.5 mm. |
10–20; corollas light to dark lavender, laminae 5–8 × 0.5–1.5 mm. |
||||
Disc florets | (9–)11–17(–21); corollas pink turning purple, 4.5–6 mm, tubes shorter than narrowly funnelform throats (thinly puberulent), lobes triangular, 0.4–0.7 mm. |
12–25; corollas yellow, 3.7–7 mm, throats narrowly funnelform, lobes triangular, 0.4–0.8 mm. |
||||
Phyllaries | in 3–5 series, appressed, lanceolate-oblong, strongly unequal, bases (tan) ± indurate, margins scarious proximally, green distally, green zones restricted to apex, obscured by hair, apices usually acute, sometimes acuminate, usually mucronate, sometimes subspinulose, faces ± densely silky. |
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. |
||||
Heads | in narrow, paniculiform (virgate) arrays (1–3(–5) per branch). |
in ± open, paniculiform arrays, branches initially patent then ascending or divaricate. |
||||
Cypselae | obovoid, not compressed, 2.5–3.5 mm, 7–10-nerved, faces densely strigose; pappi tan, (3.5–)4–6 mm. |
tan to brown, obovoid, not compressed, 2–2.5 mm, 6–10-nerved (faint), faces sparsely strigose; pappi tan, 3.75–8 mm. |
||||
2n | = 20. |
|||||
Symphyotrichum concolor |
Symphyotrichum adnatum |
|||||
Phenology | Flowering Oct–Dec. | |||||
Habitat | Sandy, clayey soils, sandhills, oak-pine scrub, open pine flatwoods, roadsides | |||||
Elevation | 0–100+ m (0–300+ ft) | |||||
Distribution |
AL; DE; FL; GA; KY; LA; MA; MD; MS; NC; NJ; NY; RI; SC; TN; VA
|
AL; FL; GA; LA; MS
|
||||
Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|||||
Key |
|
|||||
Source | FNA vol. 20, p. 492. | FNA vol. 20, p. 491. | ||||
Parent taxa | Asteraceae > tribe Astereae > Symphyotrichum > subg. Virgulus | Asteraceae > tribe Astereae > Symphyotrichum > subg. Virgulus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Aster concolor, Lasallea concolor, Virgulus concolor | Aster adnatus, Lasallea adnata, Virgulus adnatus | ||||
Name authority | (Linnaeus) G. L. Nesom: Phytologia 77: 278. (1995) | (Nuttall) G. L. Nesom: Phytologia 77: 275. (1995) | ||||
Web links |