Symphyotrichum foliaceum |
Symphyotrichum jessicae |
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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 |
Jessica's aster, Palouse aster |
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Habit | Perennials 10–60 cm, colonial; long-rhizomatous. | Perennials, 40–150 cm, colonial; long-rhizomatous. | ||||||||||||
Stems | 1–5+, ascending to erect, glabrous or sparsely puberulent. |
1–5+, ascending to erect, densely puberulent to lanate, especially 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. |
thickish, margins entire or shallowly crenate, apices acute to ± obtuse, faces densely lanate-puberulent; basal withering by flowering, petiolate, blades obovate to elliptic, 30–150 × 10–40 mm, bases cuneate to rounded, margins entire, ciliolate, apices acute, faces densely cinereous to lanate; proximalmost cauline sometimes withering by flowering, subpetiolate or sessile, blades obovate-lanceolate to elliptic, 50–100 × 10–25(–35) mm, bases cuneate, clasping, ± auriculate, apices usually acute; distal sessile, blades 20–60(–80) × 9–16(–20) mm, bases rounded to auriculate. |
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Peduncles | sparsely hairy, bracts 0–3, lanceolate. |
densely lanate, bracts 1–8, elliptic, margins ciliolate, apices acute, puberulent. |
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Involucres | campanulate, 6–16(–20) mm. |
campanulate, 6–10 mm. |
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Ray florets | 15–60; corollas violet to purple, laminae 8–18(–20) × 1–2 mm. |
18–40; corollas violet, laminae (8–)12–20 × 1–2(–2.5) mm. |
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Disc florets | 50–150; corollas yellow, 4–7 mm, lobes triangular, 0.4–1 mm. |
35–80+; corollas yellow, 6–9 mm, lobes triangular, 0.4–1 mm. |
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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. |
in 4–6 series, oblanceolate (outer) to linear (inner), unequal, bases scarious (outer sometimes foliaceous), margins slightly scarious, entire, green zones obovate to elliptic, apices acute, faces densely lanate to cinereous. |
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Heads | borne singly or in paniculiform arrays, branches ascending, up to 25 cm. |
in paniculiform, very leafy arrays, branches 4–10(–20) cm. |
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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. |
brown, cylindric to obovoid, not compressed, 3.5–4.5 mm, 4–5-nerved, faces sparsely hairy; pappi tawny, (6–)7–9 mm. |
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2n | = 80. |
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Symphyotrichum foliaceum |
Symphyotrichum jessicae |
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Phenology | Flowering Aug–Sep. | |||||||||||||
Habitat | Dry grasslands, meadows, stream banks, openings in Ponderosa pine woodlands | |||||||||||||
Elevation | 500–1200 m (1600–3900 ft) | |||||||||||||
Distribution |
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
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ID; WA
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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.) |
Of conservation concern. Symphyotrichum jessicae is known only from the Palouse and Clearwater river drainages of eastern Washington and adjacent northwestern Idaho. (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. 536. | ||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Occidentales | Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Occidentales | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | Aster foliaceus | Aster jessicae | ||||||||||||
Name authority | (Lindley ex de Candolle) G. L. Nesom: Phytologia 77: 282. (1995) | (Piper) G. L. Nesom: Phytologia 77: 283. (1995) | ||||||||||||
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