Cirsium brevistylum

Cirsium brevistylum occurs in the coast ranges and adjacent coastal slope from southwestern British Columbia to southern California. In the Pacific Northwest its range extends inland to the northern Rocky Mountains of southern British Columbia, Idaho, and northwestern Montana, and the Blue and Wallowa ranges of eastern Oregon. It is absent from the central and southern Cascade Range.

apex arrangement	radiating +
apex orientation	to ascending +
apex prominence or shape	flat +
apex width	narrow +
array architecture	subcapitate + and tight +
base architecture	clasping + and spinier than the proximal +
base orientation	short-appressed +
base position	distal + and outer +
base shape	short-decurrent +
base size	reduced +
blade shape	oblong +, elliptic +, oblanceolate +, flat +, undulate +, dentate + and pinnatifid +
bract architecture	leafy +
bract arrangement or habit	clustered +
branch orientation	ascending +
chromosome count	34 +
collar coloration	stramineous +
collar size	0.2 +
corolla coloration	white +, pink + and purple +
corolla size	slender +
cypsela coloration	brown +
face architecture	winged-petiolate + and sessile +
face arrangement	distributed +
face count	absent +
face external texture	gray-tomentose +, villous +, glabrescent + and viscid-pilose +
face other	principal +
face other or position	proximal +
face position	adaxial +, basal +, cauline +, mid + and distal +
face size	reduced +
flowering time	springsummer +, apr +, may +, jun +, jul +, aug + and sep +
habitat	coastal meadows +, marshes +, swamps +, riparian woodlands +, moist sites in coastal scrub +, chaparral +, coastal woodlands +, mixed conifer-hardwood forests + and coniferous forests +
habitat moisture	wet +
head arrangement	crowded +
head orientation	erect +
involucre external texture	arachnoid +
involucre shape	hemispheric + and campanulate +
lobe shape	triangular +, spinulose +, spiny-dentate +, lobed + and filiform +
margin shape	spiny-fringed +, entire + and serrulate +
phyllary arrangement	radiating +
phyllary coloration	green +
phyllary fusion	connected +
phyllary shape	linear-acicular +
phyllary size	subequal +
spine course	straight +
spine size	slender +
stem architecture	simple + and branched +
stem count	1 +
stem external texture	villous +, viscid-pilose + and arachnoid +
stem orientation	erect +
tip position	included + and exserted +
tip shape	knoblike +
trichome architecture	jointed +, long + and non-septate +
vein size	taxonname-major +
whole organism architecture	taprooted +
whole organism life style	annual + and biennial +

Cirsium brevistylum

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