Symphyotrichum foliaceum |
Symphyotrichum sect. Occidentales |
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alpine leafybract aster, Canby's leafybract aster, Cusick's American aster, Cusick's aster, Henderson's aster, Kootenai aster, leafy aster, leafy or leafy-bract or alpine leafybract aster, leafy-bract aster, Parry's aster |
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Habit | Perennials 10–60 cm, colonial; long-rhizomatous. | Perennials, eglandular; rhizomatous. | ||||||||||||
Stems | 1–5+, ascending to erect, glabrous or sparsely puberulent. |
usually simple, sometimes ± branched. |
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Leaves | thin, margins entire or sometimes serrate, apices acute to obtuse, faces usually glabrous, sometimes sparsely hairy; basal usually persistent, petiolate to subpetiolate, blades broadly elliptic to obovate, 30–200 × 8–25(–30) mm, bases attenuate, margins entire or sometimes serrate, apices acute to obtuse; proximal cauline sessile or subpetiolate, blades elliptic to obovate, 35–120 × 8–25 mm, bases attenuate or cuneate to rounded, sometimes ± clasping, apices acute; distal sessile, reduced distally, bases cuneate, apices acute. |
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Peduncles | sparsely hairy, bracts 0–3, lanceolate. |
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Involucres | campanulate, 6–16(–20) mm. |
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Ray florets | 15–60; corollas violet to purple, laminae 8–18(–20) × 1–2 mm. |
fewer than disc florets, in 1 series (conspicuous). |
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Disc florets/ |
50–150; corollas yellow, 4–7 mm, lobes triangular, 0.4–1 mm. |
± ampliate, lobes erect. |
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Phyllaries | in 4–6 series, oblanceolate or oblong (outer) to lanceolate or linear (inner), subequal or unequal (outer exceeding inner), bases outer foliaceous, inner indurate, margins entire, green zones elliptic to lanceolate, apices acute to rounded, faces glabrous or puberulent. |
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Heads | borne singly or in paniculiform arrays, branches ascending, up to 25 cm. |
radiate. |
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Cypselae | brown, cylindric to obovoid, not compressed, 2.5–4 mm, 3–4-nerved, faces hairy; pappi white to tawny, 5–8 mm. |
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Pappi | shorter than to equaling disc florets at flowering. |
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x | = 8. |
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Symphyotrichum foliaceum |
Symphyotrichum sect. Occidentales |
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Distribution |
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
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w North America |
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Discussion | Varieties 4 (4 in the flora). Symphyotrichum foliaceum is extremely variable and is widespread in western montane coniferous forests and subalpine meadows. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 12 (12 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 532. | FNA vol. 20, p. 531. | ||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Occidentales | Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum | ||||||||||||
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Subordinate taxa | ||||||||||||||
Synonyms | Aster foliaceus | Aster unranked Occidentales | ||||||||||||
Name authority | (Lindley ex de Candolle) G. L. Nesom: Phytologia 77: 282. (1995) | (Rydberg) G. L. Nesom: Phytologia 77: 271. (1995) | ||||||||||||
Web links |
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