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Robert Ornduff & Nancy R. Morin

Annual, glabrous to hairy. Stem: generally branched. Leaf: alternate, deeply pinnately lobed to 1–2-compound; stipules 0. Inflorescence: flowers solitary in axils, pedicelled. Flower: generally bisexual, radial; sepals 3–5, free; petals 3–5, free, white to pink or yellow; stamens 3, 8, or 10, free, generally in 2 whorls; nectary glands at bases of outer stamens; pistil 1, ovary deeply 2–5-lobed, style 1, from base of ovary. Fruit: mericarps 1–5, 1-seeded, ovoid to spheric, generally tubercled.
2 genera, 10 species: temperate North America. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Limnanthaceae

Annual, decumbent to erect. Leaf: generally 1-odd-pinnately lobed or compound; lobes or leaflets entire to deeply lobed. Flower: sepals (4)5; petals (4)5, generally > sepals, tips toothed or jagged; stamens 8 or 10; ovary lobes 4–5. Fruit: mericarps 1–5, 2.5–4 mm, obovoid to nearly spheric, smooth, ridged, or tubercled.
7 species: ± coastal western North America. (Greek: marsh flower, from habitat) [Mason 1952 Univ Calif Publ Bot 25:455–512] Plants reported as Limnanthes macounii from Central Coast are variants of Limnanthes douglasii (Meyers et al. 2010 Syst Bot 35:552–558).

Key to Limnanthes

L. alba Benth.
Erect, herbage glabrous to hairy. Stem: 8–40 cm. Leaf: 2–10 cm; leaflets 5–11, linear to ovate or oblong, entire to deeply 3-lobed. Flower: bowl- to bell-shaped; sepals 4–8 mm; petals 8–15 mm, curving over fruit in age, white to cream, aging pink or violet, base occasionally ± yellow; filaments 2–6 mm, anthers 0.75–2 mm; style 3–6 mm. Fruit: mericarps smooth, wrinkled, wide-ridged, or sharply tubercled. [Online Interchange]

L. alba subsp. alba
Herbage sparsely to densely hairy when young. Flower: sepals densely hairy; petals 10.5–16 mm, white, drying pink; anthers ± 2 mm, cream. Fruit: ± 4 mm, wide-ridged.
Winter-wet grassland, woodland; < 1400 m. s North Coast Ranges, n&c Sierra Nevada Foothills, Great Central Valley; Oregon. Apr–Jun [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Apr 1 2015
Citation for this treatment: [Author of taxon treatment] 2013. Limnanthes, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Apr 1 2015

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Geographic subdivisions indicated for the distribution of Limnanthes alba subsp. alba Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.