Cirsium occidentale var. venustum (Greene) Jeps.

Cobwebby thistle (en)

Variety

Angiosperms > Asterales > Asteraceae > Cirsium > Cirsium occidentale

Characteristics

Plants usually erect, usually 50–300 cm, variably tomentose, sometimes ± glabrate. Heads sometimes in tight clusters at ends of peduncles, usually long-pedunculate, elevated well above proximal leaves. Involucres usually longer than wide, 2–6 cm, subglabrous to densely arachnoid, usually without fine trichomes connecting tips of adjacent phyllaries. Phyllaries imbricate, outer and mid apices ascending to rigidly spreading or reflexed, straight, 5–20+ × usually 2–3 mm. Corollas usually ± red (white, pink, rarely purple), 23–35 mm. 2n = 30.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.5 - 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. venustum world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:59098-2
WFO ID wfo-0000106990
COL ID 5N4D2
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Cirsium proteanum Carduus venustus Cirsium coulteri Cirsium occidentale var. venustum Cirsium occidentale subsp. venustum