Hydrocharitaceae Frog's-bit Family


Elodea
 E. canadensis Rich. in Michx.
 Philotria canadensis
 E. densa (Planch.) Caspary
 Philotria densa

Halophila
 H. baillonis Aschers.
 H. engelmannii Aschers.

Hydrilla
 H. verticillata (L. f.) Royle

Limnobium
 L. spongia (Bosc) Steud.

Thalassia
 T. testudinum K6nig

Vallisneria
 V. neotropicalis Marie-Vict.
 V. americana


 Waterweed

 Brazilian Waterweed


Sea-grasses


Frog's-bit


Turtle-grass


Eelgrass


Gramineae Grass Family


Agrostis
 A. hyemalis (Walt.) BSP.
 A. hiemalis
 A. perennans (Walt.) Tuckerm.


Aira


caryophyllea L.
elegans Willd. ex Gaudin
Aspris capillaris


Alopecurus
 A. carolinianus Walt.
 A. ramosus


Bentgrasses
 Ticklegrass

 Autumn Bentgrass


 Silver Hairgrass



Foxtails


Amphicarpum
 A. muhlenbergianum (Schult.) Hitchc.
 A. floridanum