|University of California, Berkeley|
Key to families | Table of families and genera
1. Tip of plant body acute, upper surface ± concave or flat — dead plant with brown cells ..... W. borealis
1' Tip of plant body rounded, upper surface ± convex (except Wolffia arrhiza)
2. Upper surface of vegetative plant body with a conical bump near center; dead plant with brown cells ..... W. brasiliensis
2' Upper surface of plant body smooth; dead plants without brown cells
3. Upper surface dark green, flat; stomates generally 15–100 ..... W. arrhiza
3' Upper surface transparent green, ± convex; stomates 1–10(30)
4. Plant body 0.8–1.3 mm, ± spheric, upper surface mostly convex, center flat ..... W. columbiana
4' Plant body 0.4–0.8 mm, longer than wide, upper surface barely convex throughout ..... W. globosa
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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