Agoseris heterophylla |
Agoseris heterophylla var. quentinii |
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annual agoseris, annual false dandelion, mountain dandelion |
Arizona 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. |
spreading to prostrate; blades 2–12 cm × 3–9(–12) mm, mostly lobed, lobes 2–3 pairs, abaxially glabrous, adaxially pubescent. |
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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. |
0–26 cm, lengths mostly less than 0.5 times leaves at flowering, 0.5–3 times leaves in fruit, ± glabrate, or apically tomentose. |
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Involucres | cylindric to hemispheric, 1–2 cm in fruit. |
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Receptacles | epaleate. |
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Florets | 5–100(–300); corollas yellow, tubes 1–5 mm, ligules 2–15 × 1–3 mm; anthers 1–4 mm. |
15–30+; corollas ± equaling phyllaries at flowering, tubes 2–3 mm, ligules 2–3 × 0.8–1.5 mm; anthers ca. 1 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. |
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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. |
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Agoseris heterophylla |
Agoseris heterophylla var. quentinii |
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Phenology | Flowering Mar–Jun. | |||||||||
Habitat | Mesic to dry habitats in deserts, grasslands, and oak woodlands | |||||||||
Elevation | 1200–2000 m (3900–6600 ft) | |||||||||
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; NM |
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The relatively small corollas and anthers of var. quentinii suggest that it, too, may be autogamous, as is var. heterophylla. (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. 334. | ||||||||
Parent taxa | Asteraceae > tribe Cichorieae > Agoseris | Asteraceae > tribe Cichorieae > Agoseris > Agoseris heterophylla | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Macrorhynchus heterophyllus | |||||||||
Name authority | (Nuttall) Greene: Pittonia 2: 178. (1891) | G. I. Baird: Sida 21: 271. (2004) | ||||||||
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