OregonFlora species comparison

1–several; erect; simple or branched, glabrous or proximally villous.

basal and cauline;

basal usually withering by anthesis; opposite; simple or pinnately compound, divisions of pinnate leaves linear or terminal segments narrowly lance-oblong;

margins and surfaces glabrous or villous-puberulent, petiolate or sessile.

heads solitary or in panicle-like arrays.

flat to convex, paleate.

pistillate or sterile;

rays well exceeding involucres, dark pink to light rose or white, or yellow and sometimes marked with brown.

bisexual;

corollas tubular, gradually widened distally, yellow;

lobes 4–5, triangular; erect or spreading;

stamens 5, slightly to well exserted from corolla tubes, yellow or purple;

style branches exserted from stamen tubes.

in 2 series; erect, herbaceous, spreading in fruit; outer series somewhat shorter than inner, narrowly lanceolate to lance-linear;

tips acute;

margins hispid or much reduced and clustered at base of involucres; larger phyllaries with numerous parallel veins; inner series broadly lance-ovate;

tips acute;

surfaces glabrous, paleate.

± compressed, oblanceolate or elliptic, narrowed toward bases and tips, sometimes winged;

pappi 0 or of 2 short scales.

radiate;

peduncles glabrous.

narrow, membranous, deciduous.