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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.
Plants much reduced, not differentiated into stems, leaves; floating aquatics just below water surface; roots 0. Plant body: generally in unequal 2s; 3–10 mm, linear to oblong, thin-membranous, flat, free ends generally recurved; budding pouch triangular, with track of long cells on lower surface between midline, margin; winter buds 0. Flower: produced in cavity on upper surface; sheathing membrane 0; stamen 1; pistil 1. Seed: smooth.
10 species: worldwide, especially warm temperate, tropics. (Diminutive of Wolffia) [Landolt 1984 Veröff Geobot Inst ETH Stiftung Rübel Zürich 51:164–172]
1. Plant body 4–10 mm, widely oblong, ends strongly recurved; budding pouch angle 80–120° ..... W. lingulata
1' Plant body 3–5 mm, linear to narrowly oblong, ends generally not to ± recurved; budding pouch angle generally 40–70° ..... W. oblonga
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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