Symphyotrichum foliaceum |
Symphyotrichum chapmanii |
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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 |
savanna aster |
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Habit | Perennials 10–60 cm, colonial; long-rhizomatous. | Perennials, 30–80 cm, cespitose; rhizomes stout. | ||||||||||||
Stems | 1–5+, ascending to erect, glabrous or sparsely puberulent. |
1–3+, erect (sometimes brown proximally, strict to straight), glabrous. |
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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. |
green to dark green, firm, ± fleshy, margins entire, ciliate, apices acute, callous, faces sparsely strigillose; basal persistent or petiole bases marcescent, long-petiolate (to 15 cm; petioles sheathing, margins glabrous), blades linear to linear-lanceolate, 10–30 × 2–7 mm, bases cuneate to subattenuate, margins sparsely denticulate or entire, indurate-translucent; proximal cauline persistent, sessile or subpetiolate, blades linear, 42–105 × 1–3 mm, bases clasping, margins often revolute; distal sessile, blades usually linear, sometimes awl-shaped, 50–180 × 5–10 mm, strongly reduced distally, more abruptly so on array branches, bases subclasping to adnate for 1/2+ length, margins often revolute. |
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Peduncles | sparsely hairy, bracts 0–3, lanceolate. |
1–20+ cm, slender, glabrous, bracts 4–22, linear (awl-shaped), grading into phyllaries. |
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Involucres | campanulate, 6–16(–20) mm. |
cylindro-campanulate, 5.5–9 mm. |
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Ray florets | 15–60; corollas violet to purple, laminae 8–18(–20) × 1–2 mm. |
8–23; corollas purple to blue-lavender, laminae (10–)14–15(–20) × 0.8–2.2 mm. |
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Disc florets | 50–150; corollas yellow, 4–7 mm, lobes triangular, 0.4–1 mm. |
47–57; corollas pale yellow, 4.7–6.3 mm, throats funnelform to narrowly campanulate, lobes triangular, 0.5–0.7 mm (proximally sparsely pilose). |
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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 4–5(–6) series, oblong-lanceolate (outer) to linear-lanceolate (innermost), bases indurate (at least inner), margins scarious, hyaline, purplish distally, ciliolate, green zones narrowly lanceolate, not evident, apices purplish, acute (outer) to acuminate (inner), sometimes mucronate (inner), faces sparsely villous. |
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Heads | borne singly or in paniculiform arrays, branches ascending, up to 25 cm. |
in open, usually corymbiform, sometimes ± paniculiform arrays, branches ascending, simple, slender, elongate. |
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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. |
tan to gray-brown (nerves stramineous), obovoid, compressed, 3.1–4.5 mm, 8–10(–14)-nerved, faces glabrous; pappi yellowish, 4.4–4.7 mm. |
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2n | = 14. |
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Symphyotrichum foliaceum |
Symphyotrichum chapmanii |
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Phenology | Flowering Sep–Nov(–Dec). | |||||||||||||
Habitat | Wet savannas, pine flatwoods, bogs, and acid swamps | |||||||||||||
Elevation | 0–30 m (0–100 ft) | |||||||||||||
Distribution |
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
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AL; FL |
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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 chapmanii is known from the Appalachicola Valley, northern Florida and adjacent southeast Alabama (where it is possibly extirpated), and is disjunct to St. Lucie County (Florida). (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. 478. | ||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Occidentales | Asteraceae > tribe Astereae > Symphyotrichum > subg. Chapmaniani | ||||||||||||
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Subordinate taxa | ||||||||||||||
Synonyms | Aster foliaceus | Aster chapmanii, Eurybia chapmanii, Heleastrum chapmanii | ||||||||||||
Name authority | (Lindley ex de Candolle) G. L. Nesom: Phytologia 77: 282. (1995) | (Torrey & A. Gray) Semple & Brouillet: in J. C. Semple et al., Cult. Native Asters Ontario, 133. (2002) | ||||||||||||
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