Eucephalus breweri |
Eucephalus |
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Brewer's aster |
aster |
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Habit | Perennials, 10–100 cm (caudices woody). | Perennials, 10–160 cm (usually cespitose, induments usually of stipitate-glandular and smooth-surfaced, curved or twisted woolly hairs, plants with caudices or short rhizomes, roots fibrous). | ||||||||||||||||||||||||||||||||||||
Stems | ascending to erect, glabrate or woolly, eglandular or glandular. |
ascending or erect, simple, glabrate, puberulent, pilose, cottony, or woolly, eglandular or glandular. |
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Leaves | mid and distal blades linear-lanceolate to ovate, 2–5 cm × 6–15 mm, faces glabrate and eglandular to moderately glandular and/or woolly. |
cauline; alternate; sessile (proximal withering by flowering; proximalmost reduced, scalelike); blades (1-nerved) ovate, elliptic, oblong, lanceolate, or linear (± uniform in size), margins entire, faces glabrate, scabrous, cottony, or woolly, eglandular or stipitate-glandular. |
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Peduncles | sparsely to densely woolly and glandular. |
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Involucres | turbinate-cylindric, 6–10 mm. |
turbinate-cylindric, turbinate, turbinate-obconic, or campanulate, 10–25 mm diam. |
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Receptacles | ± flat, pitted, epaleate. |
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Ray florets | 0–21 (usually 5, 8, or 13), pistillate, fertile; corollas violet-purple, purple, pink, or white. |
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Disc florets | 10–35, bisexual, fertile; corollas yellow, ± ampliate, tubes shorter than funnelform throats, lobes 5, erect or reflexed, triangular; style-branch appendages lanceolate. |
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Phyllaries | in 3–4 series (sometimes reddish along margins), lance-linear to lance-oblong, ± subequal, margins eciliate, apices acuminate, abaxial faces glabrate and eglandular to moderately woolly or glandular. |
20–50 in 3–6 series, ± unequal (± appressed, often reddish or purplish at margins and tips), 1-nerved (keeled), ovate, lance-oblong, lanceolate, linear-oblong, or linear, chartaceous at bases, margins sometimes hyaline, especially proximally; apices acute to obtuse, green, usually puberulent, tomentose, and/or stipitate-glandular, sometimes glabrous. |
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Heads | 1–15(–35) in racemiform to corymbiform or paniculiform arrays. |
radiate or discoid, usually in open, racemiform, paniculiform, or corymbiform arrays, sometimes borne singly. |
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Cypselae | strigose; pappus bristles in 1 series (6–10 mm), barbellate. |
± obconic, flattened, laterally 1–2-ribbed, sometimes with 1–2 additional nerves on each face, glabrous, pilose, or strigose, eglandular; pappi persistent, of 30–50 whitish to tawny, barbellate or smooth, apically clavate or more conspicuously barbellate bristles in 2(–3) series (outer usually 1 mm or less, sometimes 0, inner 5–10 mm). |
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Rays | 0. |
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x | = 9. |
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2n | = 18. |
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Eucephalus breweri |
Eucephalus |
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Phenology | Flowering Jul–Sep. | |||||||||||||||||||||||||||||||||||||
Habitat | Open coniferous forest and subalpine meadows | |||||||||||||||||||||||||||||||||||||
Elevation | 1500–3000(–3500) m (4900–9800(–11500) ft) | |||||||||||||||||||||||||||||||||||||
Distribution |
CA; NV
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North America |
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Discussion | Eucephalus breweri is found in the Sierra Nevada. Specimens at the northern edge of the range may intergrade with E. glabratus and E. tomentellus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 10 (10 in the flora). Eucephalus, a relatively well-marked western North American group, has been treated as a section of Aster or as a distinct genus. Recent molecular evidence places Eucephalus, together with the eastern North American Doellingeria, at the base of the North American clade of Astereae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 40. | FNA vol. 20, p. 39. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Eucephalus | Asteraceae > tribe Astereae | ||||||||||||||||||||||||||||||||||||
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Subordinate taxa | ||||||||||||||||||||||||||||||||||||||
Synonyms | Chrysopsis breweri, Aster breweri, Heterotheca breweri | Aster section E., Aster subsection E. | ||||||||||||||||||||||||||||||||||||
Name authority | (A. Gray) G. L. Nesom: Phytologia 77: 254. (1995) | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 298. (1840) | ||||||||||||||||||||||||||||||||||||
Web links |