Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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

MENYANTHACEAE

BUCKBEAN FAMILY

William J. Stone

Perennial, ± aquatic; rhizomes thick
Leaves simple or with 3 sessile leaflets, generally alternate; stipules generally 0; petiole sheathing at base
Inflorescence: many types
Flower bisexual, radial; calyx 5-lobed; corolla 5-lobed, rotate to funnel-shaped; stamens 5, alternate corolla lobes, anthers with longitudinal slits; pistil 1, ovary superior or partially inferior, chamber 1, stigma simple or 2-lobed
Fruit: capsule, septicidal
Seeds few–many, smooth, shining
Genera in family: 5 genera, 30–40 species: worldwide.

NYMPHOIDES

FLOATING-HEART

Plant submersed; often with a cluster of short roots
Leaves simple, floating, deeply cordate, generally alternate (those on flowering stems opposite); petioles long
Inflorescence: umbel in leaf axils of flower petiole
Flower: corolla rotate, lobes bearing a glandular appendage near base; style short or 0, stigma persistent, 2-lobed
Species in genus: 20 species: Am, Eurasia, Africa. Sometimes placed in Gentianaceae but differs in having alternate leaves
Etymology: (Nymphaea-like)

Introduced

N. peltata (S.G. Gmel.) Kuntze

WATER FRINGE

Plant glabrous
Stem < 160 cm, creeping; flowering stems floating
Leaf 3–10 cm wide; margin wavy or entire
Inflorescence: flowers 2–5 in axillary bundles
Flower: pedicels 3–10 cm; calyx lobes oblong-lanceolate; corolla 30–40 mm diam, yellow, fringed-ciliate
Chromosomes: 2n=54
Ecology: Still water, slow-moving rivers
Elevation: ± 1100 m.
Bioregional distribution: n High Sierra Nevada (Trout Lake, El Dorado Co.)
Distribution outside California: Arizona, AR, ne US; native to Eurasia, Mediterranean
Cult in aquatic gardens.

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