OregonFlora species comparison

erect; simple to distally much branched, glabrous to villous or puberulent.

elliptic in outline, 2–25 × 2–10 cm;

margins usually denticulate, 2-pinnately lobed;

surfaces glabrous or lightly pubescent;

primary lobes in 4–10 pairs; secondary lobes linear to oblanceolate or triangular.

basal and cauline, alternate, bases often with lobed, fringed, or clasping auricles;

margins entire to dentate, often 1–3-times pinnately lobed;

surfaces glabrous, strigillose, floccose, or lightly to densely villous, abundantly punctate-glandular;

basal often withered by flowering, sessile or petiolate.

clusters in panicle-like arrays.

3–5 × 5–10 mm.

campanulate or hemispheric.

flat to rounded or conic, sometimes exceeding involucres in fruit;

paleae 0.

15–25; vestigial, yellow.

pistillate, sometimes vestigial or 0;

rays ovate-elliptic;

tips acute or truncate, sometimes 2–4-lobed.

corollas 1.5–2 mm, yellow.

numerous; bisexual;

corollas tubular, linear or gradually widened distally, 4–5-lobed;

lobes triangular;

stamens included or slightly exserted;

stigma lobes at tips of stamen tubes.

with chartaceous margins; inner often membranetipped.

in 3–6 series;

surfaces glabrous, villous, or minutely glandular; inner equal, linear-lanceolate to lanceolate or ovate; outer equal or gradually shorter, lanceolate; ovate or triangular;

margins membranous or chartaceous;

tips acute or obtuse.

1–2 mm, brown, 4–5-ribbed, glabrous or gland-dotted;

pappi 0 or of low crowns.

obconic or columnar, glabrous or gland-dotted;

veins 5–10+;

pappi usually of low crowns, rarely of scales or 0.

20–200;

peduncles 2–15 mm, glabrous or villous.

usually radiate, sometimes disciform;

peduncles glabrous to strigillose or villous.

=18.