OregonFlora species comparison

usually 1; erect;

branches few to many, sometimes woody proximally; leafy throughout, glabrous.

cauline, alternate, slightly reduced distally, sometimes with tufts of linear leaves on short axillary branches;

blades narrowly elliptic-lanceolate to linear;

margins entire;

veins 3–5; parallel from bases;

tips acute or acuminate;

surfaces glabrous; ± glandular-punctate, sessile.

numerous small heads clustered on branch tips in panicle-like arrays, sometimes ± flat-topped.

cylindrical or narrowly campanulate.

convex;

paleae 0.

pistillate;

rays exceeding involucres, yellow.

bisexual;

corollas cylindric, widened in distal half, yellow;

lobes 5, narrowly triangular, spreading to recurved at anthesis;

stamens 5; well exserted from corollas;

stigmas exserted from stamen tubes.

in 4–6 unequal series; erect, spreading in fruit, narrowly lanceolate or linear; outer gradually shorter; colorless or green-tipped; outermost often green throughout; midribs indistinct;

surfaces glabrous, resinous.

cylindrical, truncate, tapering to bases, inconspicuously ribbed, pappi of numerous fine bristles.

radiate.