Heterotheca zionensis Semple

Zion false goldenaster (en)

Species

Angiosperms > Asterales > Asteraceae > Heterotheca

Characteristics

Perennials, 17–55(–70) cm; taprooted. Stems 1–20+, ascending to erect (sometimes ± brittle, green to light-green proximally, greenish to whisith distally), moderately to densely hispid and short-strigose, abundantly long-hispid, sometimes becoming moderately hairy and densely stipitate-glandular distally. Leaves: proximal cauline petiolate to subsessile, blades (whitish when fresh, drying grayish to whitish green) narrowly to broadly oblanceolate, 15–45 × 5–8 mm, bases attenuate, margins flat, entire, strigoso-ciliate, proximally long-hispido-strigose, apices acute, faces densely hispido-strigose, sparsely to moderately stipitate-glandular; distal sessile, blades narrowly to broadly ovate or lanceolate to oblong, 10–20(–30) × 2.5–7.3 mm, reduced distally, densely to very densely hispido-strigose, moderately to densely stipitate-glandular beneath hairs. Heads 7–27(–46) in corymbiform arrays, branches ascending. Peduncles 9–41 mm, moderately to densely hispido-strigose, moderately to densely stipitate-glandular; bracts 0–5, proximal lanceolate, much reduced distally; linear to oblanceolate, leaflilke bracts sometimes subtending heads. Involucres cylindro-turbinate to narrowly campanulate, (4.3–)5–7.5(–8) mm. Phyllaries in 5–6 series, lanceolate, unequal (outer lengths 1 / 5 – 1 / 4 inner), margins scarious, faces either sparsely hispido-strigose and densely stipitate-glandular or moderately hispido-strigose and sparsely to moderately stipitate-glandular. Ray florets 8–18(–23); laminae 6.5–13 × 1–1.7 mm. Disc florets (11–)16–44(–62); corollas ± ampliate, (3.5–)4.5–7 mm, lobes 0.4–0.7 mm, sparsely pilose (hairs on lobes 0.1–0.3 mm). Cypselae monomorphic, obconic, compressed, 1.5–3(–4) mm, ribs ca. 10, faces moderately strigose; pappi off-white, outer of linear scales 0.25–0.5 mm, inner of 25–40 weakly clavate bristles 4–7 mm. 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) 0.17 - 0.55
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) 4-10

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 zionensis world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:278178-2
WFO ID wfo-0000067021
COL ID 6LTL7
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Chrysopsis zionensis Heterotheca zionensis