OregonFlora species comparison

erect, glabrate to tomentose or hispid; spiny-winged.

10–25 cm, deeply lobed or pinnatifid.

pinnately lobed;

lobe margins irregularly dentate;

surfaces abaxially hispid to tomentose, adaxially punctate or hispid, petiolate.

obovate or oblanceolate to linear-elliptic, 4–15 cm, shallowly or deeply lobed or pinnatifid;

lobe margins and tips spiny;

surfaces abaxially tomentose, adaxially hispid-pustulose.

alternate, lanceolate or oblanceolate; simple to shallowly or deeply lobed or pinnatifid, bases decurrent, with spiny wings;

margins spiny;

tips acute;

surfaces abaxially glabrous or tomentose, adaxially glabrous to hispid-punctate, sessile.

heads solitary or clustered in spike-, raceme-, or panicle-like arrays.

cylindric or ellipsoid, 10–25 mm in diameter.

cylindric to spherical.

flat, with numerous narrow, tapering, bristly scales;

paleae 0.

bisexual, fertile;

corollas white to pink or purple;

tubes elongate, linear; cylindrical;

lobes 5, linear;

styles exserted.

corollas 14–16 mm, purple.

narrowly lanceolate;

margins not membranous; midribs prominent.

many in several unequal series, proximally appressed, distally erect or reflexed, linear to ovate;

tips spiny;

surfaces glabrous to tomentose, rarely arachnoid-villous.

4–6 mm, tan or brown;

pappus bristles 15–20 mm.

attached basilaterally on receptacles, cylindric-fusiform, bases tapered, glabrous, pappi of numerous smooth, white, persistent bristles.

2–5 per cluster;

peduncles winged.

discoid, sessile or pedunculate.

=54, 60, 62.