Cirsium douglasii var. breweri (A.Gray) D.J.Keil & C.E.Turner

Douglas' thistle (en)

Variety

Angiosperms > Asterales > Asteraceae > Cirsium > Cirsium douglasii

Characteristics

Plants to 250 cm. Cauline leaves usually unlobed or shallowly lobed, spines usually less than 2–7 mm. Heads mostly 2–3 cm. 2n = 30.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 1.55 - 2.5
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 douglasii var. breweri world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:970387-1
WFO ID wfo-0000126367
COL ID 5N48M
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Cirsium breweri Carduus breweri Cnicus breweri Cirsium breweri subsp. breweri Cirsium breweri var. breweri Cnicus breweri var. breweri Cirsium breweri var. canescens Cirsium douglasii var. canescens Cirsium douglasii var. breweri