Symphyotrichum foliaceum |
Symphyotrichum subg. Symphyotrichum |
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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. | Annuals or perennials, eglandular; usually rhizomatous, sometimes taprooted. | ||||||||||||
Stems | 1–5+, ascending to erect, glabrous or sparsely puberulent. |
usually not brittle at maturity, usually proximally glabrous or glabrate and distally hairy in lines, sometimes ± uniformly hairy, sometimes glabrous distally. |
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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. |
basal usually withering by flowering, usually petiolate, sometimes sessile or subsessile, blades 1-nerved, spatulate to oblanceolate, elliptic, or ovate to cordate, margins coarsely serrate to crenate or entire; cauline petiolate or sessile, blades widely ovate to linear, bases cordate or subcordate, rounded, cuneate, or attenuate, sometimes auriculate and ± clasping. |
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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. |
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Disc florets/ |
50–150; corollas yellow, 4–7 mm, lobes triangular, 0.4–1 mm. |
± ampliate, throats usually ± narrowly funnelform, sometimes cylindric or funnelform-campanulate, lobes usually erect, sometimes spreading, recurved, or reflexed. |
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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. |
strongly unequal to subequal, outer sometimes ± foliaceous, green zones usually diamond-shaped to lanceolate, apices sometimes foliaceous. |
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Heads | borne singly or in paniculiform arrays, branches ascending, up to 25 cm. |
radiate or disciform. |
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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. |
cylindric to obovoid or oblong, sometimes ± compressed, 2–6-nerved, glabrous or ± strigillose. |
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Ray | (or pistillate) florets usually (6–)7–50(–60) in 1 series and laminae (3–)5–18(–21) × 0.8–2.8 mm, sometimes 14–110+ in 2–5+ series (sect. Conyzopsis) and laminae 4.5–5 × 0.1–0.2 mm or reduced to tubes. |
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x | = 7, 8. |
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Symphyotrichum foliaceum |
Symphyotrichum subg. Symphyotrichum |
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Distribution |
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
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North America; Mexico; Eurasia |
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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 ca. 58 (51 in the flora). Subgenus Symphyotrichum has been divided into three sections: sect. Conyzopsis (x = 7), sect. Symphyotrichum (including sect. Turbinelli) (x = 8), and sect. Occidentales (x = 8). Relationships among sections remain unresolved, and it is uncertain whether sect. Symphyotrichum, for instance, is monophyletic as defined here or elsewhere (e.g., G. L. Nesom 1994b). (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. 498. | ||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Occidentales | Asteraceae > tribe Astereae > Symphyotrichum | ||||||||||||
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Subordinate taxa | ||||||||||||||
Synonyms | Aster foliaceus | |||||||||||||
Name authority | (Lindley ex de Candolle) G. L. Nesom: Phytologia 77: 282. (1995) | unknown | ||||||||||||
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