Eurybia macrophylla
Eurybia spinulosa
aster à grandes feuilles, bigleaf aster, large-leaf wood-aster
Apalachicola aster
1, erect, simple, straight to ± flexuous, glabrous or sparsely villous, stipitate-glandular, more densely so distally (at least in arrays).
1(–3+), erect, simple, ± villous to glabrescent.
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.
strongly basal and cauline, linear, firm, ± fleshy, margins indurate, ± revolute, entire to spinose-serrate, smooth to remotely scabridulous or ciliate, spines indurate, finely parallel-veined with evident midribs, apices acute, revolute-indurate, faces glabrescent (minute hairs bulbous at base, threadlike distally);
basal and proximal cauline persistent, sessile or petiolate (narrowing between bases and blades), blades lance-linear to linear, 100–300 × (1–)2–5 mm, bases ± marcescent, sheathing, ciliate;
cauline sessile, blades linear to lance-linear, 20–95 × 3–5 mm, progressively reduced distally, bases rounded- to auriculate-clasping, adaxial faces sparsely villous in distal, the distal subtending heads boat-shaped.
firm, 0–4 cm, densely stipitate-glandular;
bracts 0–2, ovate-lanceolate, ± stipitate-glandular.
0 (usually) or ascending, 1–17+ mm, sparsely villosulous;
bracts 0–2, ascending, lanceolate, bases not indurate, rounded (boat-shaped), margins ciliate, faces glabrous.
broadly campanulate to campanulate, (6–)7–11 mm, shorter than pappi.
campanulate, 6.5–9.7 mm, shorter than pappi.
9–20;
corollas ± deep lavender or violet to occasionally white, (7–)11–15 × 1.4–2.4 mm.
8–17;
laminae pale purple to purplish white, 10–16(–20) × 1–1.8 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.
18–30;
corollas yellow, 5.5–7.6 mm, barely ampliate, tubes much shorter than tubular-funnelform throats (1–2 mm), lobes erect, lanceolate, 0.65–1 mm.
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.
20–40 in 4–5 series, green, often ± involute in distal 1/2–2/3 (outer) to 1/3 (inner), densely nerved (nerves not thickened), lanceolate, unequal, coriaceous, bases indurate, rounded (outer), margins entire, indurate (outer) or scarious and often purplish (inner), sparsely ciliate, apices acute to acuminate, indurate, apiculate, adaxial faces glabrous or sparsely villosulous.
(2–)8–90+ in flat-topped, corymbiform arrays.
3–16+ in spiciform to narrow, racemiform arrays.
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.
brown to gray-brown, fusiform, ± compressed, 2–2.5 mm, ribs 7–10, faces ± strigillose;
pappi of burnt-orange (coarse, sometimes apically clavellate) bristles 6–7.5 mm, as long as or slightly longer than disc corollas.
= 72.
Eurybia macrophylla
Eurybia spinulosa
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.)
Of conservation concern.
Eurybia spinulosa is known only from the Apalachicola River drainage of the Florida panhandle; it is of conservation concern in Florida and is a facultative wetland indicator. Much of its habitat has now been lost to development (R. Kral 1983, vol. 2). Kral published a map of the species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Go Botany
IL Wildflowers
MD Biodiversity
MI Flora
MN Wildflowers
MO Plants
WildflowerSearch
iNaturalist
USDA Plants Database
