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ZOSTERACEAE EEL-GRASS FAMILY

Robert F. Thorne, Robert R. Haynes, C. Barre Hellquist & Gordon Leppig

Perennial herb (annual), submersed marine aquatic, rhizomed, glabrous; monoecious or dioecious. Stem: flat, leafy, creeping or short with wide, thick base. Leaf: alternate, 2-ranked or tufted, < 2 m; sheath open or closed; blade linear, ribbon-like, tip entire to notched; stipules 0. Inflorescence: axillary or terminal spike, of limited distribution on plant, ± flat, enclosed by membranous, leaf-like bract in flower, also in fruit or not; flowers many, 2-rowed on 1 side of axis, each embedded in axis, enclosed by translucent, scale-like bract or not; peduncle not elongating. Staminate flower: perianth 0; stamen 1, anther generally sessile, 2-chambered; pollen thread-like, < 2 mm. Pistillate flower: perianth 0; ovary 1, chamber 1, ovule 1, style 1, stigmas 2. Fruit: ± achene.
3 genera, ± 18 species: seacoasts, worldwide; some species, especially Zostera marina, source of food for marine animals, some aboriginal humans. [Haynes 2000 FNANM 22:90–94] —Scientific Editor: Thomas J. Rosatti.

Key to Zosteraceae

Previous taxon: Hedychium flavescens
Next taxon: Phyllospadix

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Dec 17 2014
Citation for this treatment: [Author of taxon treatment] 2013. Zosteraceae, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=288, accessed on Dec 17 2014

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