Agoseris aurantiaca
Agoseris retrorsa
mountain agoseris, mountain dandelion, orange agoseris, orange false dandelion, orange flower agoseris, slender agoseris
spear leaf goat-chicory, spear-leaf agoseris
0.
0.
erect to decumbent;
petioles purplish, petiole margins ciliate to hairy;
blades 7–38 cm, linear-lanceolate to oblanceolate, margins entire or laciniately pinnatifid, lobes 2–4 pairs, linear to lanceolate, spreading to antrorse, lobules usually inconspicuous to subequaling lobes, rarely lacking, faces glabrous and ± glaucous or sparsely villous.
erect to ascending;
petioles often purplish;
blades linear to linear-elliptic, (7–)10–30(–36) cm, margins usually lobed to pinnatifid, rarely toothed or entire, lobes (4–)7–9(–11) pairs, linear to lanceolate, mostly retrorse, sometimes spreading, lobules often present, faces sparsely villous to tomentose.
± elongating after flowering, 8–40(–80) cm, glabrate, or apically villous to lanate, eglandular.
elongating after flowering, 15–65(–94) cm in fruit, ± glabrate, or apically villous to tomentose, eglandular.
cylindric to obconic or campanulate, 2.5–3 cm at maturity.
cylindric to obconic or campanulate, 4–6 cm in fruit.
epaleate.
epaleate.
15–100;
corollas usually orange, sometimes yellow, pink, red, purple, or white, tubes (4–)7–9 mm, ligules 4–12 × 1–3 mm;
anthers 2–5 mm.
10–100;
corollas yellow, tubes 8–20 mm, ligules 6–15 × 1.5–2.5 mm;
anthers 2–5 mm.
in 2–3 series, green or medially rosy purple, often with purple-black spots, blotches, and/or midstripes, or nearly all black, subequal to unequal, margins ciliate, faces glabrous or villous, eglandular;
outer mostly spreading, adaxially glabrous or villous;
inner erect, elongating after flowering.
in 3–5 series, medially rosy purple or all green, lacking darker spots or midstripes, margins ciliate to tomentose, faces glabrous or villous, eglandular;
outer erect to spreading, adaxially glabrous or tomentose;
inner erect, often precociously elongating and much surpassing outer.
± dimorphic, 8–18 mm, bodies cylindric to fusiform or obconic, 6–9(–11) mm, abruptly or gradually tapered to slender beaks (2–)5–10 mm, lengths mostly equaling bodies;
ribs strongly ridged, straight, glabrous or scabrous;
pappi in 2–3 series, 9–15 mm.
(15–)20–31 mm, bodies narrowly obconic, 5–7 mm, beaks (10–)15–25 mm, lengths mostly 3–4 times bodies;
ribs strongly ridged, straight, often minutely cinereous-pannose;
pappus bristles in 4–6 series, (11–)15–20 mm.
= 18, 36.
= 18.
Agoseris aurantiaca
Agoseris retrorsa
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Agoseris retrorsa appears to be most closely related to A. grandiflora. It superficially resembles A. parviflora and the two are sometimes confused. Agoseris retrorsa occurs primarily west of the Sierra Nevada; A. parviflora occurs primarily east of the same range. Cypsela characteristics will quickly separate them. Putative hybrids between A. retrorsa and A. grandiflora, A. hirsuta, and A. parviflora have been identified.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Phyllaries ± lanceolate (± herbaceous throughout), margins ± ciliate proximally, usually villous, sometimes glabrous; corollas usually orange, sometimes pinkish or yellow, rarely white; cypselae ± abruptly tapered to beaks, ribs often thicker distally | var. aurantiaca |
1. Phyllaries ± ovate or obovate (somewhat stramineous proximally), margins ± ciliate distally, usually glabrous, rarely villous; corollas usually orange or yellow, sometimes pinkish; cypselae ± gradually tapered to beaks, ribs not thicker distally | var. purpurea |
BC
OR
WA
CalFlora
Flora NW
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
