Environmental Engineering Reference
In-Depth Information
FIGURE 8.15 Some species of floating attached (A), floating unattached (B-D), and sub-
mersed (E-H) aquatic plants. (A) white water lily (Nymphaea), (B) duckweed (Spirodela
polyrhiza), (C) water velvet (Azolla), (D) water hyacinth (Eichornia crassipes), (E) Elodea
canadensis, (F) water milfoil (Myriophyllum spicatum) (G) pondweed (Potomogeton no-
dosus), and (H) coontail (Ceratophyllum). Scale bar for B and C
0.4 cm; remaining draw-
ing, scale bar
2 cm (reproduced with permission from Riemer, 1984).
has been found to 122 m in Lake Tahoe (Hutchinson, 1975). Thus, the
mosses are among the deepest living plants in lakes.
Vascular Plants
The angiosperms, the true flowering plants, are the dominant aquatic
vascular plants, with representatives of both monocots and dicots. In addi-
tion, some of the ferns and fern allies can be found associated with aquatic
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