OregonFlora species comparison

decumbent to erect; simple to well branched, glabrous or minutely glandular.

1–several, decumbent to erect or spreading; simple or branched, glabrous to villous or minutely glandular.

linear to linear-lanceolate, 1–7 cm, bases auriculate and forming a membranous sheath around stem;

margins entire or few-lobed;

lobes linear;

tips acute;

surfaces glabrous, sometimes gland-dotted, sessile.

principally cauline, alternate; simple to pinnately toothed or lobed, or pinnately compound;

surfaces glabrous to villous or minutely gland-dotted.

solitary terminal heads.

1–9 cm.

hemispheric, 3–4 mm.

spreading in fruit.

flat to convex;

paleae 0.

0, or rarely 1–3 series of 8–80+ pistillate florets with corollas 0.

corollas 1–1.5 mm, equaling or exceeding involucres, yellow.

corollas tubular, slightly widened distally;

lobes 4–5, triangular; erect;

stamens 4–5, not exserted;

styles ? 1 mm.

3–5-veined;

surfaces glabrous; inner obtuse; outer obtuse or acute.

in 2–3 equal series; lance-elliptic;

margins membranous, 1–5-veined, glabrous or villous; inner obtuse; outer obtuse or acute.

0.7–1.8 mm, glabrous or minutely glandular, brown, winged or not.

obovoid or oblong, compressed, with 2 marginal veins, sometimes wing-margined;

pappi 0.

disciform, rarely radiate or discoid.

=20.