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PLATE 54
Compsonema secundum S. and G.
Fig. 1. Three fragments of plants showing small gametangia on short
pedicels from a basal filament and complex terminal gametangia with mostly
secund lateral developments. X 125.
Fig. 2. Fragment of a plant showing a modification in which the game-
tangia are mostly terminal and erect, and only rarely possessing lateral pro-
tuberances. X 125.
Compsonema pusillum S. and G.
Fig. 3. Three fragments of plants showing shapes and positions of zoospo-
rangia and gametangia. Character of the creeping and of the erect filaments,
and a few branches pushing between the surface cells of the host. X 125.
Compsonema secundum f. terminale S. and G.
Fig. 4. Fragment of a plant showing the characteristic terminal and larffe
lateral gametangia. X 125.
Fig. 5. Filament which seems to be producing zoosporangia below an empty
gametangium. X 125.
Compsonema tenue S. and G.
Fig. 6. Fragments of plants showing erect filaments, true hairs, and zoospo-
rangia (?) and gametangia sessile on the creeping filaments. X 250.
This plate is a reprint of Setchell and Gardner, Univ. Calif. Publ Bot '' vol 7
p. 372, pi. 37, 1922.
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