Jepson Herbarium
The University and Jepson Herbaria
University of California, Berkeley
Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Azolla

View taxon page for Azolla

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

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

1. Stems equally to often unequally dichotomously branched or pinnately branched, forming round to elongate plants to 3 cm, 2 cm wide; leaves 
ovate 
image missingEgg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf.
or oblong-ovate, generally 1.2–2 mm, 1 mm wide; 
leaf 
image missingOrgan arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets).
 margins of upper (± green or ± red) leaf 
lobes 
image missing1. A major expansion or bulge, such as on the margin of a leaf, sepal, or petal, or on the surface of an ovary. 2. The free tips of otherwise fused structures, such as sepals or petals; larger than teeth.
with broad ± white band of cells >= 4 cells wide; male spore mass barbs lacking partitions ..... A. filiculoides

1' Stems ± equally dichotomously branched, forming ± round plants generally 1–1.3 cm wide; leaves ovate to ± round, 0.5–0.8 mm, 0.5–0.7 mm wide; leaf margins of upper (green or ± red) leaf lobes with narrow ± white band of cells 1–2 cells wide; male spore mass barbs with 1–3 partitions ..... A. microphylla

 

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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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