Cirsium crassicaule

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Cirsium crassicaule is known only from a few sites in the San Joaquin Valley. Some populations are threatened by habitat modification and development pressures.

Facts about "Cirsium crassicaule"
apex architecturetwisted +
apex external texturegray-tomentose +
apex orientationappressed + and spreading +
apex positionouter + and middle +
apex shapespiny-fringed + and serrulate +
base architectureclasping + and spinier than proximal +
base architecture or shapebractlike +
base positiondistal cauline +
base shapeshort-decurrent +
base sizereduced +
blade prominence or shapeflat +
blade shapeelliptic +, oblanceolate + and pinnatifid +
blade sizelarger +
bract architectureleafy +
bract arrangement or habitclustered +
chromosome count32 +
collar colorationstramineous +
collar widthnarrow +
corolla colorationrose-purple + and white +
cypsela colorationbrown +
face architecturesessile +
face conditionwithered +
face countpresent +
face external texturegray-tomentose + and arachnoid-tomentose +
face orientationerect +
face otherprincipal +
face positionadaxial +, basal +, cauline + and inner +
face sizereduced +
flowering timespringapr +, may + and jun +
habitatfreshwater marshes + and canal banks +
habitat moisturewet +
head architectureopen +, corymbiform + and paniculiform +
involucre external textureglabrous +
involucre shapeovoid + and campanulate +
lobe shapefew + and dentate +
phyllary colorationgreen + and brownish +
phyllary shapelanceolate + and linear +
phyllary sizeunequal +
ridge prominenceobscure +
sinus widthbroad +
spine sizeslender +
stem architecturehollow + and branched +
stem count1 +
stem external texturearachnoid + and villous +
stem fragilitystout +
stem orientationerect +
trichome architecturejointed +
whole organism architecturetaprooted +
whole organism life styleannual + and biennial +