Parthenium ligulatum (M.E.Jones) Barneby

Colorado feverfew (en)

Species

Angiosperms > Asterales > Asteraceae > Parthenium

Characteristics

Perennials, 1–2 cm (underground caudices 2–5+ cm, branched; plants cespitose or forming mats). Leaf blades oblanceolate to spatulate, 5–18+ × 1–2(–4+) mm, margins entire, faces strigilloso-sericeous (gray) and obscurely gland-dotted. Heads radiate, borne singly. Peduncles 0–4 mm. Phyllaries: outer 5 ± ovate, 2.5–3 mm, inner 5 ± orbiculate, 3–4+ mm. Pistillate florets 5; corolla laminae oval to elliptic, 1–2 mm, retuse. Disc florets 15–25+. Cypselae oblanceoloid to pyriform, 3.5–4 mm; pappus-like enations 2, erect to spreading, ± subulate, 0.5–1 mm (a third, ± subulate element sometimes at apex of adaxial face). 2n = 36, 72.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.01 - 0.02
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

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

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

Parthenium ligulatum world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:184064-2
WFO ID wfo-0000019899
COL ID 4DTSH
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Parthenium ligulatum Bolophyta ligulata Parthenium alpinum var. ligulatum