Jepson eFlora
Key to families | Table of families and genera

Key to Zostera

View taxon page for Zostera

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Perennial herb (annual); roots 2 per node; leaf sheath open, with 2 membranous flaps; leaf blade to 20(25) cm, (0.5) 1–1.5 (2) mm wide; staminate flowers each subtended by 1 bract ..... Z. japonica

1' Perennial herb; roots 5–20 per node; leaf sheath closed, without membranous flaps; leaf blade to 110 cm, 1.5–18.5 mm wide; staminate flowers not subtended by bract (or lowermost subtended by 1 bract)

2. Leaves 1.5–12(16) mm wide, tip generally obtuse; seed with longitudinal ridges; plants of shallow waters in bays, estuaries, rooted generally 1–4 m below mean low tide; flower Mar–Jun, fruit May–Aug ..... Z. marina

2' Leaves 12–18.5 mm wide, tip generally notched; seed smooth or with weak longitudinal ridges; plants of subtidal waters, rooted generally 4–17 m below mean low tide; flower (May)Aug, fruit Sep–Oct ..... Z. pacifica


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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