Cirsium occidentale var. candidissimum J.F.Macbr.

Snowy thistle (en)

Variety

Angiosperms > Asterales > Asteraceae > Cirsium > Cirsium occidentale

Characteristics

Plants erect or ± bushy, usually 40–200 cm, (branches often stiffly spreading), densely white-tomentose. Leaf faces densely white-tomentose. Heads sometimes in tight clusters at ends of peduncles, short-to long-pedunculate, elevated well above proximal leaves. Involucres as wide as to longer than wide, usually 2–6 cm, persistently and densely white-tomentose. Phyllaries imbricate or subequal, outer usually very long, spreading to reflexed, mid apices usually 1.5–3 cm × 2–3 mm, rigidly spreading or reflexed. Corollas red (rarely white or pink), 26–40 mm. 2n = 30, 31, 32, 33, 34, 60.
Life form
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.4 - 3.0
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 7-9
Soil humidity 5-7
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 5-10

Usage

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

Cultivation

Mode -
Germination duration (days) 15 - 18
Germination temperacture (C°) 21 - 23
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Cirsium occidentale var. candidissimum world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:59094-2
WFO ID wfo-0000109212
COL ID 5N4CW
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Cirsium candidissimum Carduus candidissimus Cirsium pastoris Cirsium occidentale subsp. candidissimum Cirsium occidentale var. candidissimum