Eurybia eryngiifolia |
Eurybia spectabilis |
|
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coyote-thistle aster, thistleleaf aster |
eastern showy aster, purple wood-aster, western showy aster |
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Habit | Plants 30–70 cm; in scattered individuals or small clumps, eglandular; rhizomes short, stout, or strong, woody caudices (roots fleshy). | Plants 10–90 cm; forming clones and clumps with rosettes, new shoots at end of rhizomes and bases of old stems; rhizomes elongate, scaly, herbaceous becoming woody. |
Stems | 1–3+, erect, coarse, villous. |
1–3, erect or sometimes ascending, straight, often stout, sometimes glabrous or glabrescent, usually ± sparsely villous proximally and/or distally, proximally eglandular to ± short-stipitate-glandular, distally glandular from 1/2–2/3, short- and long-stipitate-glandular in arrays. |
Leaves | 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 (reticulately veined), margins slightly revolute, indurate, entire or remotely crenulate-serrulate, scabrous, teeth indurate, apices acute (seldom basal obtuse), indurate, faces usually scabrous (especially abaxially), sometimes glabrous; basal and proximal cauline persistent, petioles (10–90 mm) ± narrowly winged (wings wider and shorter distally), bases sometimes marcescent, blades lanceolate or elliptic to ovate- or obovate-elliptic or spatulate, 10–160 × 3–40 mm (earlier leaves smallest), bases attenuate; mid widely winged-petiolate to subpetiolate or sessile, blades elliptic-lanceolate, ovate, or ± narrowly obovate to spatulate, oblanceolate, or lanceolate, 13–105 × (2–)5–30 mm, ± gradually reduced distally, bases attenuate or cuneate, sometimes ± clasping or sheathing (proximal); distal (arrays) sessile, oblong or narrowly ovate to linear-lanceolate or linear, 6–40 × 1–11 mm, usually abruptly reduced, becoming ± glandular. |
Peduncles | ± densely villous, sometimes sparsely stipitate-glandular distally; bracts 0–7, appressed, lanceolate, bases ± indurate, margins spinose, adaxial faces villous. |
sometimes sparsely villous, densely stipitate-glandular; bracts (0–)1–3, leaflike or sometimes phyllary-like (bases rounded, membranous, indurate), sometimes immediately subtending heads, densely stipitate-glandular. |
Involucres | campanulo-hemispheric, 9–12 mm, slightly shorter than pappi. |
campanulate, 7.5–14(–16) mm, ± equaling pappi. |
Ray florets | 25–60; corollas white or pinkish, coiling, 10–20 × 1–2.1 mm. |
15–35; corollas violet-purple, 12–25 × 1.6–4 mm. |
Disc florets | 115–260; corollas yellow, 5.5–7 mm, slightly ampliate, tubes shorter than tubular throats, lobes 0.75–1 mm, erect, lanceolate. |
25–55; corollas yellow, 5.5–7.6 mm, ± ampliate, tubes shorter than funnelform throats, lobes erect, lanceolate, 0.7–1.2 mm. |
Phyllaries | 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. |
35–70 in 5–6 series, oblong-lanceolate to sometimes spatulate (outer) to linear-lanceolate or linear (inner), unequal, membranous or sometimes foliaceous (outer), bases indurate, rounded (outer), green zones expanded, ovate to obovate (outer, sometimes foliaceous to base) or diffusely lanceolate or none (inner), margins of membranous parts hyaline or ± purplish (inner), narrowly scarious, villoso-ciliate or long-stipitate-glandular, of foliaceous parts ± indurate, scabrous or short-stipitate-glandular, apices squarrose (outer) to ± appressed (innermost), acute to obtuse, adaxial faces long-stipitate-glandular (foliaceous parts). |
Heads | 1–11+, borne singly or in racemiform arrays, branches ascending to erect, stiff. |
(1–)3–35+ usually in open, corymbiform arrays, seldom borne singly, branches ascending, stout. |
Cypselae | 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, fusiform, slightly compressed, 3–4.2 mm, ribs 12–14, faces densely strigillose; pappi of reddish-tawnish bristles 5.3–7.6 mm, ± equaling disc corollas. |
2n | = 72. |
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Eurybia eryngiifolia |
Eurybia spectabilis |
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Phenology | Flowering late spring–midsummer. | Flowering fall. |
Habitat | Low pine flatwoods, pine savannas, bogs, often on wet sand, on southern coastal plains | Mostly sandy soils, sometimes dry clay, granite outcrops, dry, oak-pine woods, pine barrens, peat bogs, borders of woods, clearings, fields, roadsides |
Elevation | 0–100 m (0–300 ft) | 0–900 m (0–3000 ft) |
Distribution |
AL; FL; GA
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AL; CT; DE; GA; MA; MD; NC; NJ; NY; PA; RI; SC; VA
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Discussion | 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 spectabilis is of conservation concern in much of its range, notably in Pennsylvania, Delaware, and Maryland. It is an eastern coastal plains species that reaches its southern limit in Alabama and Georgia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 381. | FNA vol. 20, p. 378. |
Parent taxa | Asteraceae > tribe Astereae > Eurybia | Asteraceae > tribe Astereae > Eurybia |
Sibling taxa | ||
Synonyms | Aster eryngiifolius, Heleastrum chapmanii, Prionopsis chapmanii | Aster spectabilis, Aster commixtus, Aster spectabilis var. suffultus, Biotia commixta, E. commixta |
Name authority | (Torrey & A. Gray) G. L. Nesom: Phytologia 77: 259. (1995) | (Aiton) G. L. Nesom: Phytologia 77: 262. (1995) |
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