Cirsium perplexans

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Cirsium perplexans occurs in a few scattered sites at relatively low elevations in the Rocky Mountains of west-central Colorado. In view of this restricted distribution, the common name used by governmental agencies, Rocky Mountain thistle, is misleading; one would expect a species so named to be widely distributed in the Rocky Mountains. The name Adobe Hills thistle is descriptive of the habitat.

Facts about "Cirsium perplexans"
apex external texturescarious +
apex prominence or shapeflat +
apex shapeserrulate + and fringed +
apex sizeto expanded +
appendage external texturescarious +
appendage orientationspreading + and reflexed +
appendage shapefringed +
appendage sizeexpanded +
array architecturebranched + and paniculiform +
base architectureclasping +
base architecture or shapebractlike +
base positionmid +
blade shapeoblong +, elliptic +, unlobed +, spinulose +, spiny-dentate + and pinnatifid +
body shapeentire + and with expanded , moreorless scarious , moreorless pectinately fringed terminal appendages +
bract architectureleafy +
bract arrangement or habitclustered +
bract positiondistal +
bract sizereduced +
branch countfew + and many +
branch orientationarising + and ascending +
collar colorationstramineous + and colored +
collar widthnarrow +
corolla colorationlavender + and purple +
cypsela colorationbrown +
face architecturesessile +
face colorationgreen +
face countpresent +
face external texturegray-tomentose +, glabrous +, tomentose + and pilose +
face orientationappressed +
face otherprincipal +
face positionadaxial +, basal +, cauline +, outer + and middle +
face sizereduced +
flowering timespringsummer +, may +, jun +, jul + and aug +
habitatbarren shale hillsides +, gypsiferous clay soils +, open , nearly unvegetated sites in areas of pinyon-juniper woodlands +, sagebrush scrub +, saltbush scrub +, gambel oak brush + and roadsides +
habitat inclinesloped +
involucre external textureglabrous + and floccose +
involucre shapehemispheric + and subspheric +
lobe arrangementseparated +
lobe shapeundivided + and few-dentate +
patch colorationgreen + and brown +
phyllary arrangementimbricate +
phyllary colorationgreen +
phyllary shapeovate +, oblong + and lanceolate +
ridge prominenceprominent + and obscure +
sinus widthbroad +
spine fragilityweak +
spine orientationspreading + and reflexed +
spine sizeslender +
stem count1 +
stem external texturearachnoid-tomentose + and pilose +
stem orientationerect +
tip orientationspreading + and reflexed +
tip shapemucronate + and with weak spines +
trichome architecturejointed +
trichome height or lengthshort +
whole organism architecturetaprooted +
whole organism life stylebiennial +
whole organism sizeslender +