Eurybia schreberi
Eurybia macrophylla
Schreber's aster, Schreber's wood-aster
aster à grandes feuilles, bigleaf aster, large-leaf wood-aster
1, erect, simple, straight, proximally glabrous or sparsely villous, distally densely villous.
1, erect, simple, straight to ± flexuous, glabrous or sparsely villous, stipitate-glandular, more densely so distally (at least in arrays).
basal and cauline, margins coarsely serrate (proximal) to serrate (distal), strigoso-ciliate, teeth (15–30 per side) mucronulate, apices acuminate, abaxial faces sparsely strigose, long-stipitate-glandular on veins, adaxial sparsely villous, more densely so on veins;
basal withering by flowering, petiolate (55–180 mm), bases sheathing, blades broadly ovate, 55–110 × 48–95 mm, bases cordate (with mostly deep, rectangular sinuses);
cauline petiolate to (distal) subsessile, petioles (4–100 mm) ± winged, ± clasping, blades ovate to broadly lanceolate, 27–135 × 7–112 mm, bases cordate (sinuses narrower) to rounded or cuneate-rounded;
distal (arrays) sessile, ovate to lanceolate, 6–70 × 1–27 mm.
basal and cauline, thick, firm, margins coarsely serrate (proximal) to crenate-serrate or entire (distal), scabrous, teeth mucronate, apices acuminate, sharply mucronate, abaxial faces glabrescent to sparsely strigose, veins stipitate-glandular, adaxial sparsely strigose, ± densely villous on veins, short-stipitate-glandular (more so on distal);
basal withering by flowering, petioles (25–)80–170 mm, ± winged, bases sheathing, ciliate, blades broadly ovate, (45–)110–250 × (25–)55–150 mm, bases deeply cordate (sinuses curved), sometimes slightly oblique;
cauline petiolate (3–110 mm), gradually more broadly winged and sometimes ± auriculate distally, ± clasping, ciliate, to subpetiolate or sessile, blades broadly ovate to ovate, 22–104 × 9–80 mm, gradually reduced distally, bases cordate to rounded or attenuate to cuneate;
distal (arrays) sessile, blades ovate or broadly lanceolate or elliptic to obovate or oblanceolate, 9–38 × 3–13 mm, abruptly reduced distally, bases ± clasping to rounded or cuneate (arrays), margins crenate-serrate or entire.
sparsely to moderately villous, sparsely glandular;
bracts 0–1, linear.
firm, 0–4 cm, densely stipitate-glandular;
bracts 0–2, ovate-lanceolate, ± stipitate-glandular.
cylindro-campanulate, 5.5–7.5 mm, equal to or shorter than pappi.
broadly campanulate to campanulate, (6–)7–11 mm, shorter than pappi.
6–12;
corollas white, 10.5–13 × 1.5–2.1 mm.
9–20;
corollas ± deep lavender or violet to occasionally white, (7–)11–15 × 1.4–2.4 mm.
12–20(–30);
corollas yellow, 5–6.8 mm, slightly ampliate, tubes (3.2–3.8 mm) longer than campanulate throats (1.1–1.9 mm), lobes erect to slightly spreading, lanceolate, (0.9–)1.1–1.5(–1.9) mm.
20–40;
corollas cream-color or light yellow, becoming purple, 6–7.5 mm, slightly ampliate, tubes (ca. 4 mm) longer than funnelform throats (ca 1.2 mm), lobes reflexed, lanceolate, 1–1.6 mm.
23–32 in 4–5 series, oblong (outer) to lanceolate (inner), strongly unequal, bases indurate, dark green zones in distal 1/4 or less (outer), often confined to narrow strip along midnerves or none (inner), margins narrowly scarious, densely villoso-ciliate, apices ± loose, obtuse to rounded, faces glabrous or sparsely villosulous, sometimes sparsely stipitate-glandular.
32–35 in 5–6 series, appressed, often purple-tinged, usually obovate to oblong, seldom ovate (outer) to oblanceolate or linear-lanceolate (inner) (innermost to 7 mm), strongly unequal, bases indurate, keeled or rounded adaxially, dark green zones wide, 1/3–1/2 distal portion (rarely to base in outer) to less pronounced along midveins or none (inner), margins hyaline or reddish, scarious, ± erose, densely villoso-ciliate apically, apices obtuse to rounded or acute (inner), adaxial faces ± villous, ± stipitate-glandular.
15–100+ in flat-topped, corymbiform arrays.
(2–)8–90+ in flat-topped, corymbiform arrays.
brown, fusiform to cylindro-obconic, compressed, 3.2–3.7 mm, ribs 6–12, faces glabrous or sparsely strigillose;
pappi of (65–70) orangish to burnt orange (fine, barbellulate, sometimes apically clavellate) bristles 5–6.8 mm, ± equaling disc corolla.
brown, fusiform or cylindro-obconic, compressed, 2.6–4.5 mm, ribs 7–12 (golden brown), faces glabrous or sparsely strigillose distally;
pappi of tawny to orangish (sometimes clavellate) bristles 5–7.5 mm, slightly longer than disc corollas.
= 54.
= 72.
Eurybia schreberi
Eurybia macrophylla
Eurybia schreberi is rare or extirpated in a many states at the northern limit of its range.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Eurybia macrophylla, a species of the northeastern deciduous or mixed forest, extends north into the southern boreal forest of Ontario-Quebec, and south along the Blue Ridges into northern Georgia. It becomes rare at the western edge of its range (Manitoba, Illinois, Iowa, Missouri). The plant has been reported from Mississippi but no voucher was seen.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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