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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Zosteraceae >
Marine plants; leaves never almost
pinnatifid
.; flowers in flat. spikes
Zosteraceae
consider the other alternative
Only the erect flowering stems with elongated internodes; no such vegetative stems present.
Rhizome
and stem with 2 cortical bundles near the middle (in cross-
section
)
Zostera