Jepson Herbarium
		University of California, Berkeley

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Plant generally aquatic or in perennially wet areas, generally rooted in mud; rhizome creeping, slender, branched.
Leaf: floating, emergent, or out of water, ± alike; blade 1- palmate or 0, << stipe; veins not or repeatedly forked, free or netted.
Sporangia: in stalked, spheric or ± flat- ovoid, hard cases of 1 kind, attached near stipe base.
Spores: large megaspores (female) and small microspores (male), in separate sporangia.
3 genera, ± 70 species: especially temperate. —Scientific Editors: Alan R. Smith, Bruce G. Baldwin.

Key to Marsileaceae

Leaf: blades floating and emergent; stipe of floating leaves weak.
Sporangium case: fused to stalk 0.8–1.7 mm, ± flat- ovoid; hairs long, dense, deciduous or not; distal tooth present or 0, tip of stalk often appearing tooth-like.
± 60 species (L.F. Marsigli, Italian botanist, 1656–1730) [Johnson 1986 Syst Bot Monogr 11:1–87] Marsilea mutica Mett. (native to Australia, New Caledonia), Marsilea drummondii A. Braun (native to Australia) cultivated in US in aquatic gardens, occasional escape in urban areas, may persist in CA; weed of concern in se US [Knepper et al. 2002 Amer Fern J 92:243–244].

Leaf: hairy; stipe of floating leaves 6–35 cm, others 3–8 cm; leaflet sides generally unequally concave causing leaflet asymmetry, distal margin convex, ± entire.
Sporangium case: 3–8 mm, 3–7 mm wide; stalk unbranched.
Creek beds, flood basins, vernal pools; < 2200 m. Klamath Ranges, Inner North Coast Ranges, Cascade Range, n&s Sierra Nevada Foothills, High Sierra Nevada, Great Central Valley, Central Western California (except Inner South Coast Ranges), South Coast, Western Transverse Ranges, San Bernardino Mountains, Peninsular Ranges, Modoc Plateau, Sonoran Desert;

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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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Bioregions in which taxon occurs	Red area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon; 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 have georeferencing or identification issues.
Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates.	Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria. View all CCH records   CCH collections by month Duplicates counted once; synonyms included. Species do not include records of infraspecific taxa. Blue line denotes Manual flowering time.