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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.

 

LEUCOSYRIS

David R. Morgan


Annual [perennial herb] from taproot, or subshrub. Leaf: simple, alternate, entire to deeply pinnately lobed; teeth or lobes often ± bristle-tipped. Inflorescence: heads radiate or discoid, 1 or in cyme-like clusters; involucre obconic, bell-shaped, or hemispheric; phyllaries graduated in 2–5[8] series, persistent, spreading or reflexed in fruit, proximally generally straw-colored, distally green; receptacle convex, shallowly pitted, glabrous, epaleate. Ray flower: 0 or 25–35; corolla white to lavender [blue]. Disk flower: 12–45; corolla yellow; anther tip lanceolate; style tips triangular to linear. Fruit: narrowly oblong, several- to many-ribbed, moderately to densely appressed-hairy; pappus of many unequal bristles (ray pappus occasionally 0), generally ± white.
9 species: southwestern North America. (Greek: white, Osyris, the latter for resemblance to that genus of Santalaceae) [Pruski & Hartman 2012 Phytoneuron 2012–98:1–15]
Unabridged references: [Hartman & Bogler 2006 FNANM 20:401–405; Morgan & Hartman 2003 Sida 20:1387–1416]

Key to Leucosyris

1. Ray flowers present ..... L. arida

1' Ray flowers 0 ..... L. carnosa

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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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