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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

Photo is of parent taxon

alpine leafybract aster, leafy aster

Habit Perennials 10–60 cm, colonial; long-rhizomatous. Plants 20–50 cm.
Stems

1–5+, ascending to erect, glabrous or sparsely puberulent.

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.

Cauline leaf

bases cuneate or sometimes rounded, not clasping.

Peduncles

sparsely hairy, bracts 0–3, lanceolate.

Involucres

campanulate, 6–16(–20) mm.

Ray florets

15–60;

corollas violet to purple, laminae 8–18(–20) × 1–2 mm.

Disc florets

50–150;

corollas yellow, 4–7 mm, lobes triangular, 0.4–1 mm.

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.

green, oblanceolate (outer) to linear (inner), unequal, outer exceeding inner and wider, outer often foliaceous, apices acute.

Heads

borne singly or in paniculiform arrays, branches ascending, up to 25 cm.

usually 5–20.

Cypselae

brown, cylindric to obovoid, not compressed, 2.5–4 mm, 3–4-nerved, faces hairy;

pappi white to tawny, 5–8 mm.

2n

= 16, 32, 48, 64, 80, 96.

Symphyotrichum foliaceum

Symphyotrichum foliaceum var. foliaceum

Phenology Flowering Jun–Sep.
Habitat Openings in montane woods, middle to high elevation grasslands, alpine meadows
Elevation 1400–3200 m (4600–10500 ft)
Distribution
from FNA
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; MT; WA; AB; BC
[BONAP county map]
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.)

Variety foliaceum is more common in the northern part of the range of the species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Plants 5–30 cm; heads 1–12; phyllaries subequal, narrowly lanceolate
→ 2
1. Plants usually 20–60 cm; heads usually 5–20; outer phyllaries exceeding inner, wider, often foliaceous
→ 3
2. Plants 5–20 cm; heads usually borne singly; phyllaries often purple-tinged; alpine or sub- alpine habitats
var. apricum
2. Plants 10–30 cm; heads usually 1–12; phyllaries green; montane to subalpine habitats.
var. parryi
3. Phyllaries obtuse to rounded; cauline leaves often clasping at base
var. canbyi
3. Phyllaries acute; cauline leaves sometimes rounded at base, not clasping
var. foliaceum
Source FNA vol. 20, p. 532. FNA vol. 20, p. 533.
Parent taxa Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Occidentales Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum > sect. Occidentales > Symphyotrichum foliaceum
Sibling taxa
S. adnatum, S. anomalum, S. anticostense, S. ascendens, S. boreale, S. bracteolatum, S. campestre, S. chapmanii, S. chilense, S. ciliatum, S. ciliolatum, S. concolor, S. cordifolium, S. cusickii, S. defoliatum, S. depauperatum, S. drummondii, S. dumosum, S. elliottii, S. ericoides, S. eulae, S. falcatum, S. fendleri, S. firmum, S. fontinale, S. frondosum, S. georgianum, S. grandiflorum, S. greatae, S. hallii, S. hendersonii, S. jessicae, S. laeve, S. lanceolatum, S. lateriflorum, S. laurentianum, S. lentum, S. molle, S. nahanniense, S. novae-angliae, S. novi-belgii, S. oblongifolium, S. ontarionis, S. oolentangiense, S. parviceps, S. patens, S. phlogifolium, S. pilosum, S. plumosum, S. porteri, S. potosinum, S. praealtum, S. pratense, S. prenanthoides, S. priceae, S. puniceum, S. pygmaeum, S. racemosum, S. retroflexum, S. rhiannon, S. robynsianum, S. sericeum, S. shortii, S. simmondsii, S. spathulatum, S. subspicatum, S. subulatum, S. tenuifolium, S. tradescantii, S. turbinellum, S. undulatum, S. urophyllum, S. walteri, S. welshii, S. yukonense, S. ×amethystinum
S. foliaceum var. apricum, S. foliaceum var. canbyi, S. foliaceum var. parryi
Subordinate taxa
S. foliaceum var. apricum, S. foliaceum var. canbyi, S. foliaceum var. foliaceum, S. foliaceum var. parryi
Synonyms Aster foliaceus
Name authority (Lindley ex de Candolle) G. L. Nesom: Phytologia 77: 282. (1995) unknown
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