Cirsium engelmannii

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

apex course	flexuous +
apex relief	erose +
apex shape	flattened + and entire +
apex width	narrow +
base architecture	clasping +
base architecture or shape	bractlike +
base arrangement	distributed + and separated +
base other	principal +
base position	cauline +, distal + and distalmost +
base shape	tapered + and narrowed +
base size	reduced +
blade shape	elliptic +, ovate + and pinnatifid +
body orientation	appressed +
bract size	reduced +
branch count	few +
branch orientation	ascending +
chromosome count	18 + and 1 +
collar coloration	yellow +
collar size	1 +
corolla coloration	pink +, purple + and white +
cypsela coloration	brown +
face coloration	green +
face count	absent +
face external texture	white-tomentose +, villous + and glabrate +
face position	adaxial +, basal +, outer + and middle +
face shape	entire +
flowering time	springsummer +, may +, jun + and jul +
habitat	tallgrass prairies +, old fields +, roadsides oak savannas +, forest edges + and in calcareous clay or rarely sandy soils +
involucre external texture	arachnoid +
involucre shape	ovoid +, cylindric + and campanulate +
lobe shape	triangular + and linear-lanceolate +
margin orientation	spreading +
margin shape	entire +, spinulose +, few-toothed + and lobed +
margin shape or vernation	revolute +
peduncle architecture	naked +
phyllary arrangement	imbricate +
phyllary coloration	greenish +
phyllary shape	ovate + and lanceolate +
ridge width	narrow +
root external texture	coarse +
root internal texture	fibrous +
sinus position	basal + and distal cauline +
sinus shape	rounded + and divided +
spine orientation	spreading + and deflexed +
spine size	slender +
stem architecture	branched +
stem count	single +
stem external texture	arachnoid-tomentose + and glabrate +
stem orientation	erect +
thickening architecture or shape	tuberlike +
trichome architecture	septate +
whole organism life style	biennial + and perennial +
zone coloration	darker +
zone position	subapical +

Cirsium engelmannii

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