Agoseris heterophylla |
Agoseris monticola |
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annual agoseris |
mountain agoseris |
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Habit | Plants perennial, acaulescent; taprooted, with well-developed single or branched root crowns below ground. | |
Leaves | 2–15(20) cm; blades linear to elliptic or oblanceolate; margins entire to irregularly dentate or lobed; lobes mostly triangular to linear, often angled toward base; tips obtuse to acute or acuminate; surfaces glabrous to scabrous or villous; petioles linear or narrowly winged. |
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Peduncles | 1–15+; erect or ascending, 1–20(30) cm; tips with yellow, glandular hairs, sometimes also white hairs. |
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Involucres | cylindrical to campanulate in flower, narrowly to broadly ovoid in fruit, 1–2 cm. |
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Florets | 10–40, 15–35 mm; longer than involucres, yellow; outer reddish abaxially. |
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Phyllaries | inner 12–22, narrowly lanceolate; acute or acuminate; outer gradually shorter, lanceolate to triangular; margins ciliate or not; tips acute; surfaces glabrous to ± villous and/or minutely glandular. |
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Fruits | 6–10 mm; bodies 6–8 mm, light brown or grayish; beakless or tapering into a short beaks; beaks 1–3 mm; < bodies. |
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2n | =18, 36. |
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Agoseris heterophylla |
Agoseris monticola |
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Distribution | ||
Discussion | Alpine ridges, slopes, meadows, coniferous woods, brushy flats. Flowering Jul–Sep. 1300–2900 m. BR, BW, Casc, ECas. CA, NV, WA. Native. Agoseris monticola is typically a species of higher elevations, often occurring as dwarfed plants in ecologically extreme environments. Intergrades are found between it and A. glauca var. glauca and A. parviflora, occasionally forming populations in which some plants have glabrous involucres while others have the minute glandular hairs of A. monticola. |
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Source | Flora of Oregon, volume 2, page 170 Kenton Chambers |
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Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Agoseris glauca var. aspera, Agoseris glauca var. monticola | |
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