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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.Key to Marsilea
± 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 United States in aquatic gardens, occasional escape in urban areas, may persist in California; weed of concern in southeastern US [Knepper et al. 2002 Amer Fern J 92:243–244].
Leaf: hairy; stipe of floating leaves ± 15 cm, others 3–6 cm; leaflet ± symmetrical, sides generally straight to slightly concave, distal margin truncate or convex, faintly fine-crenate. Sporangium case: 5–6 mm, 3–4 mm wide; stalk unbranched.
Creek beds, flood basins, vernal pools; 1400–2000 m. Klamath Ranges, High Cascade Range, n High Sierra Nevada, Modoc Plateau; to Washington, Montana, Utah. [Marsilea vestita var. oligospora (Goodd.) Dorn] [Online Interchange]
Previous taxon: Marsilea
Next taxon: Marsilea vestita subsp. vestita
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 6 2015
Citation for this treatment: [Author of taxon treatment] 2013. Marsilea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=32817, accessed on Mar 6 2015
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|Geographic subdivisions indicated for the distribution of Marsilea oligospora|| 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 provide evidence for eFlora range revision or may have georeferencing or identification issues.
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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