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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.



Dale E. Johnson

Annual 5–80 cm, ± woolly. Stem: erect to ascending, occasionally decumbent. Leaf: opposite proximally, alternate distally, linear to (ob)lanceolate or ovate, entire to wavy-dentate or shallowly lobed. Inflorescence: heads 1 or in cyme-like clusters, radiate (± disciform); involucre hemispheric; phyllaries 4–11 in 1 series, free or fused into lobed cup, tips black-hairy; receptacle convex to conic, smooth or pitted, epaleate. Ray flower: 1 per phyllary; corolla generally yellow, with small lobe opposite ray. Disk flower: 20–100; corolla yellow; lobes 4–5, with glandless and/or glandular hairs; anther tip elliptic-oblong or ovate; style tips oblong, appendages ± deltate, papillate. Fruit: ± obconic, ray fruit 3-angled, disk fruit 2- or 4-angled; pappus 0 or 2–7 persistent scales.
5 species: California. (Greek: single husk, from phyllaries) [Johnson 2006 FNANM 21:349–351]
Unabridged references: [Johnson 1991 Novon 1:119–124]

Key to Monolopia

1. Heads ± disciform; ray 0–0.5 mm; disk fruit 2-angled; disk pappus of 2–7 scales ..... M. congdonii

1' Heads radiate; ray 2–20 mm; disk fruit 4-angled; disk pappus 0

2. Ray entire to slightly toothed, or middle lobe < outer

3. Fruit glabrous or sparsely hairy, ± 2 mm; branches ± spreading, generally near top of plant ..... M. gracilens

3' Fruit ± uniformly gray-strigose, 2.5–3 mm; branches ± erect ..... M. stricta

2' Ray ± equally 3-lobed

4. Fruit ± uniformly gray-strigose; phyllaries free to ± 1/2 fused ..... M. lanceolata

4' Fruit ± glabrous or hairs concentrated at top; phyllaries fused into cup with triangular lobes ..... M. major


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [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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