Packera cynthioides (Greene) W.A.Weber & Á.Löve

White mountain ragwort (en)

Species

Angiosperms > Asterales > Asteraceae > Packera

Characteristics

Perennials, 20–40+ cm; rhizomatous (rhizomes horizontal to erect). Stems 1 or 2–3, clustered, densely lanate-tomentose or canescent, tufts of arachnoid tomentum in leaf axils, or glabrescent. Basal leaves (thick, leathery) petiolate; blades narrowly lanceolate or oblanceolate, 25–100+ × 5–20 mm, bases tapering, margins entire, subentire, dentate, or wavy (adaxial faces early glabrescent). Cauline leaves gradually reduced (sessile; lanceolate to oblanceolate, entire or wavy). Heads 10–30+ in open or congested, cymiform arrays. Peduncles 0 (or relatively reduced, then densely tomentose). Calyculi inconspicuous (bractlets red-tipped). Phyllaries (8–)13, green (tips red), 3–6 mm, densely tomentose proximally, glabrate distally. Ray florets (5–)8; corolla laminae 8–10+ mm. Disc florets 35–45+; corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm. Cypselae 1–1.5 mm, glabrous; pappi 5–6 mm. 2n = 46.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.2 - 0.4
Root system rhizome
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) -

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

Packera cynthioides world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:179983-2
WFO ID wfo-0000042105
COL ID 4BW8X
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Senecio cynthioides Packera cynthioides Senecio wrightii Senecio fendleri var. subintegra