Eurybia eryngiifolia |
Eurybia mirabilis |
|
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coyote-thistle aster, thistleleaf aster |
bouquet aster |
|
Habit | Plants 30–70 cm; in scattered individuals or small clumps, eglandular; rhizomes short, stout, or strong, woody caudices (roots fleshy). | Plants 30–120 cm; not strongly colonial or in clumps, not or barely stipitate-glandular; rhizomes coarse, short, woody. |
Stems | 1–3+, erect, coarse, villous. |
1–3+, erect, slightly flexuous, simple, sparsely strigose proximally or glabrescent, densely strigose distally. |
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, margins crenate-serrate, teeth mucronate, margins scabrous to strigoso-ciliate, apices acute to obtuse, ± acuminate, mucronate, abaxial faces scabrous (short strigose), adaxial ± densely strigose; basal and proximal cauline long-petiolate, petioles not to narrowly winged, sheathing, blades ovate, 50–200 × 30–120 mm, bases shallowly cordate to rounded; cauline shortly, broadly winged-petiolate to subpetiolate or sessile, ovate or elliptic to lanceolate or oblanceolate, 13–122 × 6–55 mm, gradually reduced distally, bases auriculate, not clasping, or cuneate to winged-attenuate; distal (arrays) sessile, obovate or oblong to lanceolate, 10–32 × 4–10 mm, bases rounded to attenuate, apices obtuse to rounded or acute. |
Peduncles | ± densely villous, sometimes sparsely stipitate-glandular distally; bracts 0–7, appressed, lanceolate, bases ± indurate, margins spinose, adaxial faces villous. |
densely strigose, sometimes sparsely stipitate-glandular distally; bracts 0–2, broad, densely strigose. |
Involucres | campanulo-hemispheric, 9–12 mm, slightly shorter than pappi. |
campanulate, 7–12 mm, shorter than pappi. |
Ray florets | 25–60; corollas white or pinkish, coiling, 10–20 × 1–2.1 mm. |
(7–)16–20(–30); corollas white to lavender, 10–15 × 1.4–2.1 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. |
20–40; corollas pale yellow, becoming purplish-tinged on lobes, funnelform, slightly ampliate, 6–7.5 mm, tubes longer than throats, lobes spreading, lanceolate, 1–1.5 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. |
46–75(–90) in 5–7 series, oblong-lanceolate (outer) to linear-lanceolate (inner), strongly unequal, membranous, bases indurate, rounded (outer), green zones in distal 1/3–1/2 foliaceous (outer) or 0 (innermost), margins hyaline, narrowly scarious, erose, ciliate, apices ± squarrose or reflexed, obtuse to acute and mucronulate (outer) or acuminate (inner), faces strigoso-villous to strigillose, eglandular. |
Heads | 1–11+, borne singly or in racemiform arrays, branches ascending to erect, stiff. |
3–10+ in loose, flat-topped, corymbiform arrays. |
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. |
reddish brown to brown, fusiform, compressed, 3–4 mm, ribs 7–12, faces sparsely strigillose; pappi of cinnamon (apically clavate) bristles, equaling disc corollas. |
2n | = 18. |
|
Eurybia eryngiifolia |
Eurybia mirabilis |
|
Phenology | Flowering late spring–midsummer. | Flowering late summer–early fall. |
Habitat | Low pine flatwoods, pine savannas, bogs, often on wet sand, on southern coastal plains | Deciduous or mixed deciduous woods, on slopes or alluvial plains, usually on basic or circumneutral soils, Piedmont Plateau |
Elevation | 0–100 m (0–300 ft) | 100–300 m (300–1000 ft) |
Distribution |
AL; FL; GA
|
NC; SC |
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.) |
Of conservation concern. Eurybia mirabilis is infrequent throughout its range. It has been reported for Alabama and Georgia but no specimens were seen. Such reports may be based on specimens of E. jonesiae identified as Aster commixtus. Both species have been so identified. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 381. | FNA vol. 20, p. 373. |
Parent taxa | Asteraceae > tribe Astereae > Eurybia | Asteraceae > tribe Astereae > Eurybia |
Sibling taxa | ||
Synonyms | Aster eryngiifolius, Heleastrum chapmanii, Prionopsis chapmanii | Aster mirabilis |
Name authority | (Torrey & A. Gray) G. L. Nesom: Phytologia 77: 259. (1995) | (Torrey & A. Gray) G. L. Nesom: Phytologia 77: 261. (1995) |
Web links |