Anabaena unispora N.L.Gardner

AlEW YORK
BOTANICAL
CARDEN
HERBARIUM OF FRANCIS DROUET
dbtA.	ZÍ	37
On Najas and Potamogetón, 1—2 ft, deep,
McDonald Lake, Yankee Springs,
Hastings, MICHIGAN
4 August 1936
¡G. T, Velasquez
(material dried from formalin)
L Oo Anabaena unispora Gardn., Mem. New York Bot. Gard. 7: 59. PI.
12, fig. 8. 1927; Prescott, Trans. Amer. Microsc. Soc. 56: 502. PI. LXV,
fig. 12-14. 1936.—This alga grows in flocculent clumps up to 1.5 cm. in
diameter, floating free in the water or entangled in masses of other algae.
The trichomes are straight or somewhat flexuous, mostly lying parallel
with each other, and rather compactly so in the older masses. The proto-
plasm is coarsely granular; there is evidence that at least some of these
601
1937]
DROUET: MYXOPHYCEAE
granules are pseudovacuolar in nature. Gardner figures the spore as simply
ovoid; though in the type specimen in the Herbarium of the New York
Botanical Garden many of the spores are of this shape, the majority is
long-ovoid or ellipsoidal and conspicuously narrowed at either point of
attachment (Fig. 1). Prescott has figured an immature spore. In the future
it will probably become necessary to synonymize the name A. unispora
Gardn. with A. Volzii Lemm., Abh. Nat. Ver. Bremen 18: 153. Taf. IX,
fig. 4, 5, 20. 1906, described from Singapore and Java. I refrain from using
the latter name here because I have not had the opportunity to compare
the types of the two species. Specimens seen: MICHIGAN: McDonald
602
BULLETIN OF THE TORREY CLUB
[VOL. 64
Lake, Yankee Springs, Hastings, G. T. Velasquez 15,4 Aug. 1936 (Velasquez,
D, F} Mi, Y). PUERTO RICO: in a pool near the Park, Santurce, Wille
49a (Type in Herb. New York Bot. Gard.), 49c, 61d, 25 Dec. 1914 (A).
CANAL ZONE: Among the floating islands, Gigante Bay, C. W. Dodge,
9 Aug. 1925 (D, Mo. Y); Gatun Lake, near Barro Colorado Island, A. M.
Chickering, July 1934 (D, Pr, F).
Drouet: Sonia Myxophycaaa from
the Canal Zone. Bull#forray Club#
64: 600# B# 1937
Fig. 1. Detail of mature spore, heterocyst, and vegetative cells from the type
specimen of Anabaena unispora Gardn. X2000._
/V EW YORK
BOTANICAL
Carden
NEW YORK BOTANICAL GARDEN
00739718
5* vo^
BOTANrCAL
00739718