Egeria

Planchon

Annales des Sciences Naturelles, Botanique sér. 3, 11: 79. 1849.

Common names: South American elodea
Etymology: Latin egeri, a nymph, in reference to aquatic habitat
Treatment appears in FNA Volume 22.
Revision as of 20:31, 5 November 2020 by imported>Volume Importer
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Plants perennial, of fresh waters. Rhizomes and stolons absent. Erect stems rooted in substrate, branched or unbranched, elongate. Leaves cauline, in whorls of 5 or more [opposite], submersed, sessile; blade linear, base sloping to stem, apex obtuse; midvein without rows of lacunae along side(s), blade uniform in color throughout;; abaxially surface without prickles or aerenchyma; intravaginal squamules entire. Inflorescences 1-flowered, sessile; spathes not winged. Flowers unisexual, staminate and pistillate on different plants, projected to surface by slender, elongate floral tube base, pedicellate; petals white. Staminate flowers: filaments distinct; anthers linear; pollen in monads. Pistillate flowers: ovary 1-locular; styles 3, not 2-fid. Fruits ovoid, smooth, dehiscing irregularly. Seeds fusiform, mucilaginous.

Distribution

Introduced; North America, Central America, South America, Eurasia, Africa, Australia.

Discussion

Species 2 (1 in the flora).

Lower Taxa

... more about "Egeria"
Robert R. Haynes +
Planchon +
South American elodea +
North America +, Central America +, South America +, Eurasia +, Africa +  and Australia. +
Latin egeri, a nymph, in reference to aquatic habitat +
Annales des Sciences Naturelles, Botanique +
cook1984c +  and john1961a +
Hydrocharitaceae +