2

(2)
VI. Pondweed Order (Naiadales)
(a) Pondweed Family (Naiadaceae) (8) American
Pondweed (Potamogeton americanus)
VII. Water Plaintain Order (Alismales).
(a) Water Plantain Family (Alismaceae) (9) Creeping
Bur-head (Echinodorus radicans) (10) Upright Bur-
head. (Echinodorus cordifolius). (11) Grass-leaved
Sagittaria (Sagittaria graminea), (12) Ovate-leaved
Sagittaria (S. platyphylla)
VIII. Grass Order (Poales)
(a) Grass Family (Poaceae or Gramineae) (13) Rat-
tail Grass (Manisuris cylindrica). (14) Forked Beard-
Grass (Andropogon furcatus), (15) Bushy Beard-grass
(A. glomeratus), (16) Golden-haired Beard-grass (A.
chrysoconius), (17) Torrey's Beard-grass( A. torreyanus).
(18) Indian Grass(Sorghastrum nutrans) (19) Johnson-
Grass (Sorghum halepense), (20) Arkansas Limnodea (Limno-
dea arkansasa), (21) Joint-grass (Paspalum distichum) (22)
Tall Paspalum (P. dilatatum) (23) Florida Paspalum (P.
floridanum) (24) Straw-colored Paspalum (P. stramineum)
(25). Smooth Paspalum (P. glabratum), (26) Silky Millet
(Eriochloa sericea) (27) Eriochloa acuminata