Parthenium confertum A.Gray

Gray's feverfew (en)

Species

Angiosperms > Asterales > Asteraceae > Parthenium

Characteristics

Biennials (sometimes flowering first year or persisting), 10–30(–60+) cm. Leaf blades ovate or rounded-deltate to elliptic, 30–80(–120+) × 10–20(–40+) mm, usually ± pinnately or sub-bipinnately lobed, ultimate margins entire, faces strigillose, usually also with erect hairs 1–2 mm and gland-dotted. Heads disciform or obscurely radiate, borne in open, ± paniculiform arrays. Peduncles 2–8(–12+) mm. Phyllaries: outer 5 lance-ovate to elliptic, 2.5–3+ mm, inner 5 ± orbiculate, 3–3.5 mm. Pistillate florets 5; corolla laminae 0 or ± coroniform, 0.1–0.5 mm. Disc florets 20–30+. Cypselae ± obovoid, 2–3 mm; pappus-like enations 2, ± erect, deltate to ovate, 0.5–1 mm (sometimes a third, subulate spur near apex adaxially). 2n = 36, 68, 72.
Life form
Growth form
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 0.3
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Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
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Environment

Light -
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Hardiness (USDA) 7-11

Usage

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

Cultivation

Mode -
Germination duration (days) -
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Distribution

Parthenium confertum world distribution map, present in Mexico and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:236501-1
WFO ID wfo-0000002479
COL ID 4DTS8
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Parthenium confertum Parthenium confertum var. confertum

Lower taxons

Parthenium confertum var. divaricatum Parthenium confertum var. lyratum Parthenium confertum var. microcephalum