Agoseris heterophylla |
Agoseris glauca |
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annual agoseris, annual false dandelion, mountain dandelion |
false dandelion, mountain dandelion, pale agoseris, prairie agoseris, short-beak agoseris |
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Habit | Annuals. | |||||||||||||
Stems | 0 or 1 (erect, 0–5 cm). |
0. |
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Leaves | mostly erect, sometimes prostrate; petioles not purplish, margins glabrous or ciliate; blades usually oblanceolate to spatulate, rarely linear, 1–25 cm, margins entire or lobed; lobes 2–3 pairs, linear to spatulate, spreading to antrorse, lobules mostly 0, glabrous or densely hairy. |
erect to decumbent; petioles rarely purplish, petiole margins glabrous or pubescent, not usually ciliate; blades lanceolate to oblanceolate, 2–46 cm, margins usually entire, sometimes dentate, rarely lobed or lacerate, lobes 2–3 pairs or irregularly arranged, lanceolate, spreading, lobules 0, faces glabrous and glaucous or sparsely villous to tomentose. |
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Peduncles | elongating after flowering, 3–60 cm in fruit, glabrous or glabrate, or basally puberulent and apically hairy to tomentose, sometimes stipitate-glandular. |
not notably elongating after flowering, 5–60(–90) cm in fruit, glabrous or glabrate, or apically puberulent to lanate, sometimes stipitate-glandular. |
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Involucres | cylindric to hemispheric, 1–2 cm in fruit. |
obconic to hemispheric, 1–3 cm in fruit. |
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Receptacles | epaleate. |
epaleate or paleate. |
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Florets | 5–100(–300); corollas yellow, tubes 1–5 mm, ligules 2–15 × 1–3 mm; anthers 1–4 mm. |
15–150; corollas yellow, tubes 4–18 mm, ligules 6–24 × 2–5 mm; anthers 3–7 mm. |
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Phyllaries | in 2–3 series, green or medially rosy purple, sometimes purple-black spotted or tipped, subequal to unequal, margins glabrous or ciliate, faces usually puberulent to villous, mostly stipitate-glandular, sometimes glabrous; outer erect or spreading, adaxially usually villous to lanate, sometimes glabrous; inner erect, ± elongating after flowering. |
in 2–3 series, green or medially rosy purple, often with purple-black spots, midstripe, and/or tips, subequal to unequal, margins glabrous or ± hairy, not usually ciliate, faces glabrous or tomentose, sometimes stipitate-glandular or eglandular; outer erect or spreading, apices adaxially glabrous or hirsuto-villous; inner erect, not notably elongating in fruit. |
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Cypselae | 7–16 mm, bodies mostly fusiform to obconic, sometimes tumid, 2–5(–10) mm, beaks 5–11 mm, lengths 1–4 times bodies, ribs 0 or alate, straight to strongly undulate, uniform or diminishing proximally; pappus bristles in 2–3 series, 4–9 mm. |
7–15 mm, bodies fusiform to narrowly conic, 5–9 mm, tapered to stout beaks 1–4 mm, lengths mostly less than 1/2 times bodies; ribs flattened to ridged, glabrous, or distally scabrous; pappi in 2–3 series, 8–18 mm. |
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2n | = 18, 36 |
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Agoseris heterophylla |
Agoseris glauca |
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Distribution |
AZ; CA; ID; MT; NM; NV; OR; UT; WA; BC; nw Mexico (including Guadalupe Island) [Introduced in Europe (Sweden)]
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AZ; CA; CO; ID; MI; MN; MT; ND; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; NT; ON; SK; YT
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 19, p. 332. | FNA vol. 19, p. 326. | ||||||||||||
Parent taxa | Asteraceae > tribe Cichorieae > Agoseris | Asteraceae > tribe Cichorieae > Agoseris | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | Macrorhynchus heterophyllus | Troximon glaucum | ||||||||||||
Name authority | (Nuttall) Greene: Pittonia 2: 178. (1891) | (Pursh) Rafinesque: Herb. Raf., 39. (1833) | ||||||||||||
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