[Members of the Sunflower Family in the Cascade Mt. Range with Discoid Flower Heads]

The Thistles of the Cascade Mountains of Oregon and Washington

The Genus Cirsium

Mountain Thistle: Cirsium remotifolium ?

This photo shows the involucral bracts and flower head of what appears to be mountain thistle (Cirsium remotifolium var. ?) as seen along Coyote Creek Road in the Umpqua National Forest..........June 25, 2005.

Canada Thistle, Creeping Thistle: Cirsium arvense (Synonyms: Cirsium arvense var. arvense, Cirsium arvense var. horridum, Cirsium arvense var. mite) -

Short-styled Thistle, Clustered Thistle: Cirsium brevistylum -

Ashland Thistle: Cirsium ciliolatum -

Gray-green Thistle: Cirsium cymosum var. canovirens -

Edible Thistle, Indian Thistle: Cirsium edule var. edule (Synonym: Cirsium hallii)-

Cayuse Thistle, Edible Thistel: Cirsium edule var. macounii -

Snowy Thistle, Snowwool Thistle: Cirsium occidentale var. candidissimum -

Mountain Thistle, Fringe-bract Thistle: Cirsium remotifolium var. odontolepis (Synonyms: Cirsium callilepis, Cirsium callilepis var. callilepis, Cirsium callilepis var. oregonense, Cirsium centaureae, Cirsium remotifolium ssp. oregonense, Cirsium remotifolium ssp. pseudocarlinoides)  -

Few-leaved Thistle, Weak Thistle: Cirsium remotifolium var. remotifolium (Synonym: Cirsium remotifolium ssp. remotifolium) - ?

Dinnerplate Thistle, Elk Thistle, Meadow Thistle, Sessile Thistle, Shasta Valley Thistle, Stemless Thistle, Toiyabe Thistle: Cirsium scariosum (Synonyms: Carduus americanus, Carduus coloradensis, Cirsium acaule var. americanum, Cirsium acaulescens, Cirsium americanum, Cirsium butleri, Cirsium coloradense, Cirsium coloradense ssp. acaulescens, Cirsium coloradense ssp. longissimum, Cirsium congdonii, Cirsium drummondii ssp. lanatum, Cirsium drummondii ssp. lanatum, Cirsium drummondii ssp. latisquamum, Cirsium drummondii ssp. vexans, Cirsium drummondii var. acaulescens, Cirsium drummondii var. oregonense, Cirsium erosum, Cirsium hookerianum var. scariosum, Cirsium kelsey, Cirsium lacerum, Cirsium magnificum, Cirsium minganense, Cirsium oreophilum, Cirsium quercetorum, Cirsium scariosum var. americanum, Cirsium scariosum var. robustum, Cirsium scariosum var. scariosum, Cirsium scariosum var. thorneae, Cirsium scariosum var. toiyabense, Cirsium tioganum, Cirsium tioganum var. coloradense, Cirsium tioganum var. tioganum, Cnicus drummondii var. acaulescens, Cnicus tioganus)

Bull Thistle, Common Thistle: Cirsium vulgare -

Paul Slichter E-mail