Eurybia radula (Aiton) G.L.Nesom

Low rough aster (en)

Species

Angiosperms > Asterales > Asteraceae > Eurybia

Characteristics

Plants 10–100 cm; in lax clones, eglandular; rhizomes elongate or short, filiform or cordlike, herbaceous, remotely scaly. Stems 1, erect, straight, often reddish, simple, glabrous or glabrescent to sparsely villous proximally, villous distally. Leaves cauline, rugose-veined, margins ± revolute, ± remotely, ± deeply serrate, scabrous, teeth ± indurate (mucronate), apices mucronulate, abaxial faces scabrous, adaxial ± villous, particularly on veins (increasingly so distally); proximalmost withering by flowering, winged-petiolate, petioles equaling or longer than blades, bases ± sheathing, sometimes marcescent, blades spatulate to oblanceolate, 10–42 × 3–8 mm, sometimes reduced, smaller than mid, bases attenuate to cuneate, apices obtuse to acute; mid sessile, lanceolate, oblanceolate, or narrowly obovate to narrowly elliptic or elliptic, (23–)30–115 × 5–36 mm, gradually reduced distally, bases tapering or rounded to ± auriculate-clasping (often narrowed above base), apices acute to acuminate; distal (arrays) sessile, (6–)10–40 × 2–7 mm. Heads 1–25+ in open corymbiform arrays or borne singly. Peduncles ± densely villous; bracts 0–2, sometimes subtending heads. Involucres campanulate, 5.5–9 mm, shorter than pappi. Phyllaries 30–50 in 4–5 series, oblong or oblong-lanceolate, seldom ovate (outer), lanceolate to linear-lanceolate (inner), strongly unequal, membranous, bases indurate, rounded (outer), green zones full-width, occasionally purplish (inner), in distal 1 / 2 (outer; rarely 2 / 3 and foliaceous) to less than 1 / 6 and paler or none (inner), margins hyaline (seldom purplish), narrowly scarious, ± erose, densely ciliate, apices usually appressed, often squarrose, usually acute, sometimes obtuse, mucronulate, faces glabrous or sparsely strigillose. Ray florets 13–30; corollas pale blue-violet, 10.5–15 × 1.4–2 mm. Disc florets 37–72; corollas yellow, 4.5–6 mm, slightly ampliate, 4.8–5.8 mm, tube lengths about twice funnelform throats (2.7–3.4 mm), lobes erect, lanceolate, 0.6–1 mm. Cypselae tawny to stramineous, fusiform to cylindro-obconic, slightly compressed, 2.7–3.5 mm, ribs 8–18 (stramineous or reddish brown), ± crowded, faces glabrous; pappi of pale cinnamon bristles 4.5–5.2 mm, shorter than disc corollas. 2n = 18.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 1.0
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 4-9
Soil humidity -
Soil texture -
Soil acidity 2-8
Soil nutriment -
Hardiness (USDA) 8-10

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by divisions.
Mode divisions
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Eurybia radula unspecified picture

Distribution

Eurybia radula world distribution map, present in Canada, Germany, France, Saint Pierre and Miquelon, and United States of America

Conservation status

Eurybia radula threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:981739-1
WFO ID wfo-0000128608
COL ID 3D3B2
BDTFX ID -
INPN ID 772188
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Aster nudiflorus Eurybia radula Aster radula f. strictus Aster biflorus Aster radula Aster radula var. strictus Aster radula var. radula