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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

EURYBIA ASTER

Luc Brouillet


Perennial herb from caudex or rhizome, fibrous-rooted. Stem: decumbent to erect, 1–12 dm. Leaf: basal and/or cauline, alternate, entire or ± serrate, basal generally petioled, cauline generally sessile. Inflorescence: heads radiate, (1 or) in flat-topped to cyme-, raceme-, or panicle-like cluster; involucre narrowly to broadly bell-shaped; phyllaries graduated in 3–7 series, free, outer widely ovate to lanceolate, inner linear, obtuse to acute, ± white at base, green in distal 1/3–3/4, green zone basally truncate, at least inner pale-papery-margined; receptacle flat to convex, glabrous, epaleate. Ray flower: 5–60; corolla white to violet. Disk flower: 8–260; corolla yellow, often becoming pink- or purple-tinged, tube > or < throat; anthers yellow, often becoming pink- or purple-tinged, tips oblong to ± triangular; style branches flat on inner face, base ± warty, tip ± acute, minutely hairy. Fruit: ± compressed, 7–12-ribbed, glabrous or ± hairy, ± brown; pappus of ± barbed bristles, white to ± pink, yellow or brown.
22 species: North America, Eurasia. (Greek: eurys, wide, and baios, few, for leaves or rays of Eurybia macrophylla (L.) Cass.) [Brouillet 2006 FNANM 20:365–382]

Key to Eurybia

1. Stem distally glandular; disk corolla tube < throat; leaves entire, basal present at flower, > cauline ..... E. integrifolia

1' Stem hairy, not glandular; disk corolla tube >= throat; leaves entire to sharply toothed, basal and proximal cauline early-deciduous

2. Ray corolla purple to violet; leaf entire to minutely serrate, cauline with small earlike basal lobes or slightly clasping; stems decumbent to ascending, distally minutely soft-wavy-hairy; phyllary dark-purple-margined ..... E. merita

2' Ray corolla white to pale violet; leaf coarsely serrate, cauline often clasping; stems ascending to erect, ± densely long-soft-wavy-hairy; phyllary sometimes purple-margined ..... E. radulina

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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