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ZYCiNEMATACHAE
PLATE V
Zygnema
Fig. I.—Z. substcllinitni , vegetative cells and the enlarged receptive
gametangia from Bartlesviile, Oklahoma. Fic. 2.—Z. lutcosporum, gam-
etangia and zygospore from Bohemia. After Czurda. Fig. 3.—Z. fiuvum,
zygospore, vegetative cells, and akinete from Eden, Texas. After Taft.
Fig. 4.—Z. calosponim, zygospores and vegetative cell from Szechwan,
China. After Jao. Fig. 5.—Z. vaucherii, gametangia and zygospores from
Cape Cod, Massachusetts. Fig. 6.—Z. normani, zygospore and gametangia
from Norman, Oklahoma. After Taft. Fig. 7.—Z. iubcriiciatiim, zygo-
spores and gametangia from China. After Jao. Figs. 8-9.—Z. germanictim
zygospores and gametangia from Germany. After Czurda. Figs. 10-12.
Z. insignc, conjugation patterns and zygospores. After Jao, and de Bary.
Figs. 13-14.—Z. janicutn, scalariform conjugation and zygospores from
China. After Li, and Jao. Fig. 15.—Z. subjanicum, zygospore and gam-
etangia from China. After Jao. Fig. 16.—Z. stellinum, aplanospores and
zygospores from Starkville, Mississippi, April, 1925. Note relative length of
aplanosporangia and gametangia. (See also Plate I and Plate VI.)