Hymenoxys brachyactis Wooton & Standl.

East view rubberweed (en)

Species

Angiosperms > Asterales > Asteraceae > Hymenoxys

Characteristics

Biennials or perennials, 30–60 cm (monocarpic; sometimes with sparingly branched, woody caudices). Stems 1–4(–8), green throughout, branched distally, glabrous or sparsely hairy. Leaves: blades simple or lobed (lobes 3–9), glabrous, gland-dotted; mid leaves lobed (lobes 3–7, terminal lobes 0.8–1 mm wide). Heads (7–)40–150(–250) per plant, in paniculiform to corymbiform arrays. Peduncles 1.2–2 cm, glabrous or sparsely hairy. Involucres usually urceolate, sometimes campanulate, 6–8 × 5–6 mm. Phyllaries in 2 series, unequal; outer 8(–9), basally connate 1/2 their lengths, lanceolate, 4–6 mm, apices acuminate to acute; inner 8(–10), obovate, 4.5–5 mm, apices mucronate. Ray florets 8(–9); corollas yellow, 7–8.5 × 3–4(–4.8) mm. Disc florets 25–60+; corollas 3.1–4.2 mm. Cypselae narrowly obpyramidal, 2.1–2.5 mm; pappi of 5(–7) obovate to lanceolate, aristate scales 2.5–3 mm.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3 - 0.6
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Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
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Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
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Soil acidity -
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Hardiness (USDA) -

Usage

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

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
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Optimum temperature (C°) -
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Distribution

Hymenoxys brachyactis world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:125972-2
WFO ID wfo-0000006429
COL ID 3NLMN
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Hymenoxys brachyactis