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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.
Annual to shrub. Stem: slender to stout and fleshy. Leaf: simple or 1–3-pinnately dissected into linear or narrowly oblanceolate lobes, basal and/or cauline, alternate, sessile or petioled, often ± fleshy. Inflorescence: heads radiate, 1 or in few- to many-headed cyme-like clusters; peduncle ± long; involucre hemispheric or bell-shaped; phyllaries in 2 series, outer ± spreading, thick, green, ± fleshy, inner thin, membranous; receptacle flat to rounded, paleate; palea flat, scarious. Ray flower: 5–20; ray yellow, showy. Disk flower: 10–150+; corolla yellow to orange; style tips truncate or deltoid. Fruit: ray and disk fruits alike or different, generally compressed front-to-back, winged; pappus 0 or of 2 scales.
8 species: southwestern United States; northern Baja California. (Greek: slenderness, perhaps describing the narrow leaf lobes) [Mort et al. 2004 Syst Bot 29:781–789; Strother 2006 FNANM 21:185–198] Formerly in (polyphyletic) Coreopsis.
Unabridged note: Leptosyne species form a monophyletic group that is not closely related to the clade containing the type sp. of Coreopsis.
1. Perennial herb or shrub; stem stout, 3–20 dm; ray elliptic to oblong, much longer than wide; heads, including rays, generally 4–10 cm diam
2. Trunk erect, fleshy, to ± 2 m; stem solid; heads (1)8–20+ per cluster; peduncle 6–20 cm ..... L. gigantea
2' Trunk 0; stem hollow; heads generally 2–4 per cluster; peduncle 15–50 cm ..... L. maritima
1' Annual; stem slender, generally 0.5–4 dm; ray oblong to ovate or obovate; heads 1–7 cm diam
3. Disk fruit ciliate, pappus scales 2, 1–5 mm; ray fruit glabrous, pappus scales 0
4. Outer phyllaries triangular-ovate; disk pappus scales 2.5–5 mm ..... L. calliopsidea
4' Outer phyllaries linear to linear-oblong; disk pappus scales <= 3 mm
5. Disk pappus scales 1.7–2.8 mm; palea and disk fruit fused at base, falling together; rays spreading horizontally in fully opened heads ..... L. bigelovii
5' Disk pappus scales 0.9–1.3 mm; palea free from disk fruit, falling separately; rays reflexed in fully opened heads ..... L. hamiltonii
3' Disk and ray fruits similar, never ciliate; pappus 0 or of 1–2 scales, < 1 mm
6. Leaves ± flat, 1–2-pinnately divided into narrowly oblanceolate lobes 1–3 mm wide; outer phyllary bases with gland-tipped teeth ..... L. stillmanii
6' Leaves or leaf lobes linear or thread-like, 0.3–1.3 mm wide; phyllary teeth 0
7. Fruit rusty-tan to light brown or ± red, generally blotched with red or black spots near margin at least when young, puberulent, wings irregularly thickened, corky ..... L. californica
7' Fruit dark brown, shiny, ± glabrous, wings thin ..... L. douglasii
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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