Cirsium engelmannii

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Cirsium engelmannii occurs mostly in the blackland prairies of eastern Texas. It ranges northward into southeastern Oklahoma and eastward to northwestern Arkansas.

Facts about "Cirsium engelmannii"
apex courseflexuous +
apex relieferose +
apex shapeflattened + and entire +
apex widthnarrow +
base architectureclasping +
base architecture or shapebractlike +
base arrangementdistributed + and separated +
base otherprincipal +
base positioncauline +, distal + and distalmost +
base shapetapered + and narrowed +
base sizereduced +
blade shapeelliptic +, ovate + and pinnatifid +
body orientationappressed +
bract sizereduced +
branch countfew +
branch orientationascending +
chromosome count18 + and 1 +
collar colorationyellow +
collar size1 +
corolla colorationpink +, purple + and white +
cypsela colorationbrown +
face colorationgreen +
face countabsent +
face external texturewhite-tomentose +, villous + and glabrate +
face positionadaxial +, basal +, outer + and middle +
face shapeentire +
flowering timespringsummer +, may +, jun + and jul +
habitattallgrass prairies +, old fields +, roadsides oak savannas +, forest edges + and in calcareous clay or rarely sandy soils +
involucre external texturearachnoid +
involucre shapeovoid +, cylindric + and campanulate +
lobe shapetriangular + and linear-lanceolate +
margin orientationspreading +
margin shapeentire +, spinulose +, few-toothed + and lobed +
margin shape or vernationrevolute +
peduncle architecturenaked +
phyllary arrangementimbricate +
phyllary colorationgreenish +
phyllary shapeovate + and lanceolate +
ridge widthnarrow +
root external texturecoarse +
root internal texturefibrous +
sinus positionbasal + and distal cauline +
sinus shaperounded + and divided +
spine orientationspreading + and deflexed +
spine sizeslender +
stem architecturebranched +
stem countsingle +
stem external texturearachnoid-tomentose + and glabrate +
stem orientationerect +
thickening architecture or shapetuberlike +
trichome architectureseptate +
whole organism life stylebiennial + and perennial +
zone colorationdarker +
zone positionsubapical +