Cirsium pitcheri

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Cirsium pitcheri is endemic to beach and dune habitats around lakes Huron, Michigan, and Superior. It has been extirpated from portions of its former range at the southern end of Lake Michigan. It is threatened by foot traffic, off-road vehicular activity, and clearing and development of beachside habitats. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Facts about "Cirsium pitcheri"
apex architecture or shapespineless +
apex reliefscabrid +
apex shapeflattened +
array architecturecorymbiform +
base developmentdeveloped +
base positiondistal cauline +
base shapedecurrent +
blade shapeelliptic +, obovate + and divided +
branch count0 + and to several +
branch orientationascending + and spreading +
chromosome count34 +
collar colorationcolored +
collar widthnarrow +
corolla characterrich +
corolla colorationdull +, pinkish-tinged + and purple +
cypsela colorationbrown +
face arrangementdistributed +
face conditionwithered +
face countpresent +
face external texturegray-tomentose +
face orientationappressed +
face otherprincipal +
face positionbasal +, cauline +, outer + and middle +
face shapeacute +
flowering timespringsummer +, may +, jun +, jul +, aug + and sep +
habitatsand dunes and beaches +
habitat moisturewet +
involucre external texturearachnoid + and glabrate +
involucre shapeovoid + and campanulate +
lobe arrangementremote +
lobe arrangement or shapelinear +
lobe orientationascending + and spreading +
margin shaperevolute +, entire + and spinulose +
pappus height or lengthshorter +
phyllary arrangementimbricate +
phyllary shapeovate-lanceolate + and linear-lanceolate +
ridge widthnarrow +
spine orientationascending + and spreading +
spine sizeslender +
stem count1 + and few +
stem external texturegray-tomentose +
stem orientationerect +
streak colorationdarker +
whole organism life stylebiennial + and perennial +
wing shapelinear-lobed + and spiny +