Heterotheca marginata Semple

Sonora false goldenaster (en)

Species

Angiosperms > Asterales > Asteraceae > Heterotheca

Characteristics

Perennials, 38–80 cm, herbage abundantly long-hirsute; taprooted. Stems 1–40, ascending to erect (sometimes reddish brown proximally, brittle), sometimes arching, hispido-scabrous (axillary leaf fascicles often present). Leaves: cauline stiff; proximal petiolate, blades oblanceolate, (180–)240–550 × 4–7(–9) mm, bases convex-cuneate, margins entire, strigoso-ciliate, with many long-hispido-strigose cilia all along, apices acute, mucronate, faces sparsely to moderately, coarsely hispido-scabrous, sparsely stipitate-glandular; distal sessile, blades oblanceolate, 14–31 × 3.3–5.2 mm, reduced distally, apices acute. Heads 8–50(–78), in open paniculiform arrays. Peduncles 12–29 mm, moderately to densely hispido-strigose, sparsely stipitate-glandular; bracts 0–3, linear-oblanceolate, usually greatly reduced, rarely leaflike and linear-oblanceolate, sparsely to moderately hispido-scabrous, sparsely stipitate-glandular. Involucres campanulate, 6.5–9(–10) mm. Phyllaries in 4–5 series, narrowly triangular-lanceolate, unequal (outer lengths 1 / 5 – 1 / 4 inner), scarious, faces moderately strigose (larger hairs to 1 mm), eglandular to sparsely stipitate-glandular. Ray florets 10–15; laminae 9–14.5 × 1-2.5 mm. Disc florets (25–)31–46(–50); corollas barely ampliate, 4.5–7.5 mm, tubes and throats glabrate, lobes 0.4–0.9 mm, glabrous or glabrate (hairs 0.1–0.2–0.3 mm). Cypselae monomorphic, obconic, compressed, 1.5–3.2 mm, ribs 8–10 (sometimes brownish), faces moderately strigose; pappi off-white, outer of linear scales 0.5–1 mm, inner of 35–45 bristle 4.6–7.4 mm, longest acute to weakly clavate. 2n = 18, 36.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.38 - 0.8
Root system tap-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-9
Soil humidity 1-5
Soil texture 3-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) -

Usage

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

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Heterotheca marginata world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:307157-2
WFO ID wfo-0000010087
COL ID 6M5JR
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Heterotheca marginata