Wolffia
 W. columbiana Karst.
 Bruneria columbiana
 W. papulifera Thompson
 Bruneria punctata


Watermeal


Wolffiella
 W. floridana (Smith) Thompson
 W. oblonga (Phil.) Hegelm.

 Mayacaceae Bog-moss Family


Mayaca
 M.
 M.


Bog-mosses


aubletii Michx.
fluviatilis Aubl.


Xyridaceae Yellow-eyed-grass Family


Xyris
 X. ambigua Beyr. ex Kunth
 X. baldwiniana Schult. in R. & S.
 X. brevifolia Michx.
 X. caroliniana Walt.
 X. flexuosa, X. pallescens
 X. difformis Chapm.
 X. elata, X. neglecta
 X. drummondii Malme
 X. elliottii Chapm.
 X. fimbriata Ell.
 X. flabelliformis Chapm.
 X. iridifolia Chapm.
 X. jupicai L. Rich.
 X. communis
 X. longisepala Kral
 X. platylepis Chapm.
 X. scabrifolia Harper
 X. serotina Chapm.
 X. smalliana Nash
 X. stricta Chapm.


Yellow-eyed-grasses













 Common Yellow-
 eyed-grass


 Eriocaulaceae Pipewort Family

Eriocaulon Pipeworts
 E. compressum Lam.