Key to Wolffia

View taxon page for Wolffia

(For a list of species in Wolffia, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Tip of plant body 

acute 

Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle.

, 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

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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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