Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

MARSILEACEAE

MARSILEA FAMILY

Alan R. Smith and Thomas Lemieux

Plant generally aquatic, generally rooted in, often stranded on mud; rhizome creeping, slender, branched
Leaves floating, emergent, or out of water, ± alike; blade 1-palmate or 0, << petiole; veins not or repeatedly forked, free or netted
Sporangia in stalked, spheric or ± flat-ovoid, hard cases of 1 kind, near petiole base
Spores large (female) and small (male), in separate sporangia
Genera in family: 3 genera, ± 70 species: especially temp.

PILULARIA


Leaf grass-like; blade 0
Sporangium case fused only to stalk tip, spheric, hairy; teeth 0
Species in genus: ± 6 species: generally temp
Etymology: (Latin: little ball, from sporangium case)

Native

P. americana A. Braun


Leaves generally 2–6(11) cm
Sporangium case ± 2–3 mm diam
Chromosomes: 2n=20
Ecology: Vernal pools, mud flats, lake margins, reservoirs, etc.
Elevation: < 1500 m.
Bioregional distribution: Inner North Coast Ranges, Cascade Range, n&c Sierra Nevada Foothills, n High Sierra Nevada, Great Central Valley, San Francisco Bay Area, South Coast Ranges, South Coast, Western Transverse Ranges, Peninsular Ranges
Distribution outside California: Oregon, Baja California; also scattered c&se US, S.America
Poorly collected, often overlooked due to its small, grass-like appearance
Horticultural information: TRY.

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