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54
ZYGNEMATACEAE
scrobiculate, usually hidden by layer of yellow-brown granules between
the outer and median walls. (PI. VIII, Figs. 18-21.)
United States: Michigan, Douglas Lake region; Wisconsin, Madison.
Canada, Ontario (A. B. Klugh Coll.).
9. Zygnemopsis tiffaniana Transeau 1944. Ohio Jour. Sci. 44,
p. 244. Formerly listed as Debarya cruciata and Z. cruciata
Price (191 1).
Vegetative cells io-i2;u. x 30-60/^; chromatophore with 2 pyrenoids;
conjugation scalariform; zygospores formed n\ the broad conjugating
tubes and extending into both gametangia; spores quadrangular with
concave or rarely straight sides, angles produced or slightly concave,
20-24/x X 28-32^; median spore wall yellow, punctate. (PI. VIII,
Figs. 22-23.)
United States: Florida (Tiffany Coll.); Oklahoma (Taft Coll.).
Canada, British Columbia (Wailes Coll.).
Named for Hanford L. Tiffany of Northwestern University, author of
The Oedogoniaceae and Algae, the Grass of many Waters.
In 1932 there was but one incompletely described species with approximately
these dimensions. Now there are several with mature spores and
it is impossible to say which species Price had in 1911. The American col-
lections are clearly representatives of a single species, and not necessarily
"Z, cruciata."
10. Zygnemopsis sinensis Transeau 1934. Trails. Amer. Micros.
Soc. 53, p. 215, Fig. 22.
Vegetative cells 10-13JU. x 29-72/.S with 2 more or less elongate,
stellate chromatophores; conjugation scalariform; zygospores formed
in the broad conjugating tubes and extending far into both gametangia;
spores quadrate-ovoid, 29-32 /a x 29-36 /a; median spore wall yellow,
scrobiculate; pits 2-2.5 /u, ^^ diameter, 2.5-3 /a apart. (PI. VIII, Fig. 24.)
China, Wuchang, Hupeh (Li Coll.).
11. Zygnemopsis indica Randhawa 1937. Proc. Indian Acad. Sci.
5, p. 297, Fig. I. Also as Ghosella indica. 1934.
Vegetative cells 10-15/^ x 50-75/^., with 2 rounded or stellate chro-
matophores, each with a central pyrcnoid; reproduction by zygospores,
parthenospores, and aplanospores; conjugation scalariform; zygospores
compressed-cjuadrangular-ovoid or compressed-globose, 34-46/ii x 40-
53/A; median wall yellow-brown, smooth or undulate, with abundant
granules between the outer and median walls; aplanospores and par-
thenospores with similar walls, 20-26/^1 x 40-46/Li, in sporangia to 8om
in length. (PI. VIII, Figs. 26-27.)
India, Punjab near Hamira, February to April, 1930.