Fan Palm
Washingtonia filifera
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Northern Watermeal
Wolffia borealis
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Columbian Watermeal
Wolffia columbiana
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Asian Watermeal
Wolffia globosa
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Tongueshape Bogmat
Wolffiella lingulata
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Saber Bogmat
Wolffiella oblonga
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Cocklebur
Xanthium orientale
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Horned Pondweed
Zannichellia palustris
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Davy's Centaury
Zeltnera davyi
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Tall Centaury
Zeltnera exaltata
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Monterey Centaury
Zeltnera muehlenbergii
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Spring-loving Centaury
Zeltnera namophila
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Alkali Centaury
Zeltnera trichantha
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Common Eelgrass
Zostera marina
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Wide-leaved Eelgrass
Zostera pacifica