Eurybia compacta

G. L. Nesom

Phytologia 77: 259. 1995.

Common names: Slender aster
IllustratedEndemic
Basionym: Aster gracilis Nuttall Gen. N. Amer. Pl. 2: 158. 1818,
Synonyms: Aster surculosus var. gracilis (Nuttall) A. Gray
Treatment appears in FNA Volume 20. Treatment on page 377. Mentioned on page 367, 378.

Plants 15–50 (–70) cm, in clumps, eglandular; caudices thickened, woody, ovoid to spheric. Stems 1–8+, erect, simple, strict, glabrescent, usually ± densely villous distally. Leaves basal and cauline, thick, firm (only midnerves conspicuous), margins entire or nearly so, indurate, scabrous, apices indurate, mucronate, faces scabrous (especially distal) to sometimes glabrous, adaxial sometimes villous (especially proximal) at least along midnerves; basal often withering by flowering (bases sometimes marcescent), petioles erect, longer than blades, bases sheathing, winged, ciliate, blades narrowly elliptic to ovate or obovate, 20–70 × 8–20 mm, bases cuneate, margins sometimes crenulate-serrulate, teeth mucronate, apices obtuse to rounded; cauline usually sessile, sometimes subsessile (ascending), lanceolate to oblanceolate, 15–80 (–90) × 2.5–12 mm, bases sheathing to auriculate-clasping (distal), apices acute. Heads 3–55+ in flat-topped, corymbiform arrays, branches ascending, slender. Peduncles slender, villous; bracts 1–2, often 1 near heads, leaflike (bases sometimes indurate and white as in phyllaries). Involucres cylindro-campanulate, 6.5–9 mm, slightly shorter than pappi. Phyllaries 24–35 in 4–5 series, oblong (outer) to lanceolate (inner), unequal, coriaceous (outer) to membranous (inner), bases indurate, rounded (outer), margins hyaline, narrowly scarious, ± erose, ciliate (outer), apices reflexed, green (except innermost), purple-margined, less scarious, rounded or obtuse (outer) to acuminate (inner), mucronate, abaxial faces glabrous or obscurely puberulent, eglandular. Ray-florets (5–) 8–14; corollas blue-violet to rose-purple or bluish, often pale, 5–8 (–10) × 1–1.8 mm. Disc-florets 10–20; corollas pale-yellow, 5.5–6.2 mm, not ampliate, tubes longer than narrowly funnelform throats, lobes triangular, 0.65–0.9 mm. Cypselae stramineous, cylindro-obconic, 1.75–2.6 mm, ribs 9–12 (crowded), faces glabrate to strigillose; pappi of tawny to cinnamon bristles 5.9–6.2 mm, equaling disc corollas. 2n = 18.


Phenology: Flowering midsummer–early fall.
Habitat: Dry, sandy places, dry to moist pinelands, oak-thickets, bogs, barrens
Elevation: 0–200 m

Distribution

V20-863-distribution-map.gif

Del., Ga., Md., N.J., N.C., S.C., Va.

Discussion

Eurybia compacta may be extirpated from much of its original range (Georgia, Maryland, South Carolina, Virginia) and may now be of conservation concern. It is present on the Atlantic coastal plains and outer Piedmont. A. Cronquist (1980) stated that it approaches E. surculosa on one hand, and E. avita and E. paludosa on the other. This reflects the close affinity between sections Calliastrum and Heleastrum (see above). I have seen no voucher for the Alabama report.

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property."thick" is not a number.

... more about "Eurybia compacta"
puberulent +  and glabrous +
not tailed +, rounded +  and obtuse +
purple-margined +  and by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
distinct +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
reflexed +  and by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
subequal +
scarious +  and indurate +
8mm +  and 20mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
flat-topped +
Luc Brouillet +
G. L. Nesom +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
sheathing +  and auriculate-clasping +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
rounded +  and obtuse +
indurate +
8mm;20mm +
Aster gracilis +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
obtuse;rounded +
reduced +
8mm;20mm +
rugulose +  and muricate +
slender +
barbellulate +  and barbellate +
tawny +  and cinnamon +
0.59 cm5.9 mm <br />0.0059 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
ovoid +  and spheric +
subsessile +  and sessile +
8 cm80 mm <br />0.08 m <br /> (9 cm90 mm <br />0.09 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (8 cm80 mm <br />0.08 m <br />) +
lanceolate +  and oblanceolate +
2.5mm +  and 12mm +
Slender aster +
not 2-lipped +  and actinomorphic +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
pale-yellow +, pale +, blue-violet +  and rose-purple or bluish +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
not ampliate +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
7-12(-18)-nerved +
beaked +, 2-ribbed +  and 5-ribbed +
cylindro-obconic +
fertile +  and bisexual +
fertile +  and bisexual +
Del. +, Ga. +, Md. +, N.J. +, N.C. +, S.C. +  and Va. +
0–200 m +
glabrate +  and strigillose +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, sandy places, dry to moist pinelands, oak-thickets, bogs, barrens +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1.4 cm14 mm <br />0.014 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
cylindro-campanulate +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
reflexed;usually erect;spreading +
triangular +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
ciliate +  and by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +, nearly +  and entire +
20mm;70mm +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
obtuse +  and rounded +
8mm +  and 20mm +
2-carpellate +
barbellulate +  and barbellate +
pinkish +, yellowish +, tan +, tawny +  and cinnamon +
persistent +
unequal +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
20mm;70mm +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
obtuse +  and rounded +
Flowering midsummer–early fall. +
oblong +  and lanceolate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
9 +  and 12 +
exalbuminous +
Illustrated +  and Endemic +
1 +  and 8 +
appendaged +  and truncate +
papillate +  and smooth +
Aster surculosus var. gracilis +
Eurybia compacta +
species +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
by flowering , petioles erect , longer than blades , bases sheathing , winged , ciliate , blades narrowly elliptic to ovate or obovate , 20-70×8-20 mm , bases cuneate , margins sometimes crenulate-serrulate , teeth mucronate , apices +
obtuse +  and rounded +
0.8 cm8 mm <br />0.008 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
ampliate +
10 cm100 mm <br />0.1 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +