Eurybia eryngiifolia
Eurybia surculosa
coyote-thistle aster, thistleleaf aster
creeping aster
1–3+, erect, coarse, villous.
1–3+, erect, simple, straight, proximally sparsely strigillose to glabrescent, distally strigose or villoso- or hirsuto-strigose.
strongly basal and cauline, coriaceous, margins indurate, entire to remotely spinose-serrate, remotely and obscurely scabridulous, spines indurate-margined or wholly indurate, finely parallel-veined with evident midnerves, apices acute, revolute, indurate, abaxial faces glabrous;
basal and proximal cauline persistent (bases ± marcescent when leaves deciduous), petioles scarcely distinct, blades linear (grasslike), 70–350 × 3–8 mm, adaxial faces glabrous;
cauline sessile, blades linear to lance-linear, 15–130 × 1.5–7 mm, progressively reduced and more spinose distally, adaxial faces progressively more villous distally.
basal and cauline, firm (only midnerves conspicuous), margins slightly revolute, slightly indurate, entire or sometimes remotely crenulate-serrulate, scabrous, teeth indurate, apices acute to obtuse, indurate, often mucronate, abaxial faces scabrous, adaxial sparsely strigose or glabrous;
basal and proximal cauline usually persistent, sometimes withering by flowering (bases often marcescent), petioles sometimes narrowly winged, bases sheathing, blades narrowly elliptic, narrowly ovate, or lanceolate to spatulate, narrowly obovate, or oblanceolate, 13–135 × (2–)6–35 mm (earliest smaller), bases attenuate to cuneate;
mid short-winged-petiolate or sessile, blades lance-oblong, lance-elliptic, lanceolate, or oblanceolate, 22–105 × 3–14 mm, gradually reduced distally, bases slightly auriculate-clasping to cuneate or attenuate;
distal (arrays) sessile, blades lanceolate to linear, 7–42 × 1–6 mm, abruptly reduced.
± densely villous, sometimes sparsely stipitate-glandular distally;
bracts 0–7, appressed, lanceolate, bases ± indurate, margins spinose, adaxial faces villous.
densely strigose or strigoso-hispid, sometimes sparsely long-stipitate-glandular distally;
bracts (0–)1–3(–6), leaflike to phyllary-like (bases indurate), scabrous or sparsely strigose.
campanulo-hemispheric, 9–12 mm, slightly shorter than pappi.
cylindro-campanulate, 7–11(–13) mm, shorter than pappi.
25–60;
corollas white or pinkish, coiling, 10–20 × 1–2.1 mm.
13–30;
corollas bluish violet, (8–)11.5–15.5 × 1.5–2.3 mm.
115–260;
corollas yellow, 5.5–7 mm, slightly ampliate, tubes shorter than tubular throats, lobes 0.75–1 mm, erect, lanceolate.
25–40;
corollas pale yellow turning purplish, 5–7.2 mm, slightly ampliate, tubes shorter than funnelform throats, lobes erect, deltate to triangular, 0.75–1.1 mm.
70–140 in 4–5 series, greenish, densely thick-nerved, lanceolate to linear (innermost), unequal, coriaceous, bases indurate and rounded (outer), margins entire, indurate or ± scarious, erose (inner), sometimes sparsely villoso-ciliate, ± densely stipitate-glandular, apices squarrose, green and often purplish-tinged, foliaceous, long-acuminate, adaxial faces villosulous, rarely also sparsely stipitate-glandular.
35–65 in 4–5 series, oblong (outer) to linear-oblong or seldom linear (inner), strongly unequal, membranous, bases indurate, rounded (outer), dark green zones foliaceous, sometimes slightly dilated, in distal 1/3–1/2 (outer) to 1/8–1/7 or none and not reaching margins (inner), margins hyaline or sometimes purplish, narrowly scarious, erose, ciliate (scarious parts), ± scabrous (foliaceous parts), sometimes short-stipitate-glandular (innermost), apices spreading to squarrose, obtuse, often dilated (innermost), mucronulate (outer) or apiculate (inner), abaxial faces glabrous or strigillose, both scabrellous on foliaceous parts.
1–11+, borne singly or in racemiform arrays, branches ascending to erect, stiff.
(1–)3–50(–122+), usually in open or dense, corymbiform arrays, seldom borne singly.
straw-colored, ellipsoid to obovoid, 2–3.5 mm, ribs 11–13 prominent, glabrous;
pappi of (ca. 35) orangish tan (coarse, sometimes clavellate) bristles 7.8–8.2 mm, slightly longer than disc corollas.
brown, cylindro-obconic, slightly compressed, 3.2–3.5 mm, ribs 8–10, stramineous, strigillose;
pappi of tawny-yellowish to pinkish bristles 5.2–7.1 mm, ± equaling disc corollas.
= 36.
Eurybia eryngiifolia
Eurybia surculosa
Eurybia eryngiifolia is known from the Florida panhandle and adjacent areas of southern Georgia and Alabama. The species is of conservation concern in Alabama.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Eurybia surculosa is of conservation concern in Virginia and Alabama. It is often confused with E. compacta, its close relative from the coastal plains. In states where both are present, it is found only inland in the southern Appalachian Mountains and not on the coastal plains; its larger heads help to differentiate it from E. compacta.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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