A description of the cyanobacteriae Anabaena circinalis Rabenhorst and Anabaena flos aquae Brebisson, ex Bornet et Flanault is given. Illustrations are included

Starmach, K.

English

Aquatic Commons

Freshwater Biological Association 
FBA Translation (New Series) No. 84 
Title: Anabaena circinalis Rabenhorst & A. flos aquae 
Brebisson, ex Bornet et Flanault. [Identification Key] 
Author(s) STARMACH K. 
Reference: Flora Slodkowodna Polski, 2, 499-504 
Original language: Polish 
Date of publication of original: 1966 
Translator: G. Jaworski 
Date of publication of translation: 1975 
Number of pages of translation: 4 
FBA Translations are to be considered as "provisional". As a rule 
they have not been prepared by expert translators, nor have they 
been edited by the original authors. 
They are available from The Librarian, 
Freshwater Biological Association, 
The Ferry House, 
Far Sawrey, 
AMBLESIDE, 
Westmorland, 
England. 
at the current rate for xerox copying. 
32. Anabaena circinalis Rabenhorst ( = A. circinalis [Kutz] Hansgirg, A. Hassalii 
[Kutz] Wittrock) figs 756-9. 
Curved trichomes form regular or irregular spirals, sometimes almost straight, 
8-11-(l4)μ wide, without a mucilage sheath or with diffuse mucilage, floating 
single or aggregated in amorphous bundles. The cells are oval or barrel shaped, 
with gas vacuoles. Heterocysts intercalary, single, oval or widely oval, 
(6.5)-9-12μ wide. Lengthwise the spores are oval, or cylindrical, 15-21μ wide 
and 20-28μ long. Is common in the plankton of calm waters. 
Varieties are dependent on the width and shapes of the filament and also the size 
of the spores. 
f.tenuis (¥. et G.S. West) Elenkin. Trichomes 5-7μ wide, heterocysts the same 
size as vegetative cells, spores 8.5-10μ wide and 12.5-25μ long. 
f.minor. V.Poljanskij fig.757. Trichomes 6 .9-8μ wide, heterocysts 10.3-11.5μ 
wide, spores 10.3-12.6μ wide and 21.8-31.6μ long. 
f.brevispora Schkorbatow. fig.758. Spores 21μ long and 15μ. wide, trichomes 
surrounded by mucilage. 
f.macrospora (Wittr.) Elenkin fig.759. Trichomes 7-8μ. wide, heterocysts 7.5-8.5μ 
long, spores 9-10.5μ wide and 25-36μ long. 
pp 499-504 
33. Anabaena flos aquae Brebisson, ex Bornet et Flahault (figs. 760-6, 772) 
Forms of floating plants composed from trichomes which are coiled and entangled 
with each other, sometimes irregularly coiled, surrounded with an indistinct 
mucilage sheath. Cells are oval, barrel shaped or cylindrical, pale grey 
bluegreen occasionally yellowish green, with gas vacuoles. They are (2.5)-3-7-(8?)μ 
wide and 2.5-11-12μ long; the terminal cells of the trichomes are rounded. The 
heterocysts are single, intercalary, round barrel shaped or lengthwise oval, 
(2)-5-7-(8.5)μ wide, 5-8.5-(11)μ long. Spores develop singly or up to four in a 
row, they are oval to cylindrical, sometimes bent, developing either near to or 
at a distance from the heterocysts, 5.5-13-(l4)μ wide, and (13)-15-35-(55?)μ long 
Reproduces by hormogonia and spores as well as fragmentation of trichomes and 
plants. 
The species is most variable, in particular with regard to the shape of the 
filaments and thalli, the shape and size of the cells and the shape and size of 
heterocysts and spores. Numerous varieties are described, but only three clearly 
defined forms can be accepted. Komarek (1958) devoted a special study to this 
species, but in spite of this he requires further data. 
f.flos aquae (A.flos aquae f.typica Elenkin (figs. 760, 76l), A.circinalis 
[Kutzing] Hansgirg, A.flos aquae var.gracilis Klebahn et f.gracilis 
Elenkin, A.helicoidea Bernard, A.contorta Bachmann, A.flos aquae var. 
intermedia Woronichin et f. intermedia Elenkin, A. flos aquae var. 
jacutica Kisselev et f.jacutica Elenkin and others.; 
Cells are oval or barrel shaped, spores 1-4 in a row, in the main not next to the 
heterocysts. Cells are 3.5-7-(8?)μ wide and (l3)-15-28-(50?)μ long. 
f.Lemmermanni(P.Richter) Canabaeus (A.Lemmermanni. P.Richter, A.flos-aquae 
f.Lemmermanni Canabaeus, A.flos-aquae [Lyngb.) Breb. sensu Geitler 
[1932] et Klebs [1895], A.flos-aquae f.maior Elenkin, A.spiroides var. 
minor Utermohl [1925] and probably A.Utermoehli Geitler [1925], 
A.flos-aquae var laxa Skuja) (figs.762, 765, 766, 772.) 
Cells barrel shaped to cylindrical, spores on either side of the heterocysts, cells 
are 2.5-7μ wide, 2.5-10. long, heterocysts are 5-8.5μ wide, 5.5-10μ long and 
spores 6.8-11μ wide, 15-35μ long. 
f.Treleasii (Born.et Flah.) Elenkin (A.flos-aquae var treleasei Bornet Flah. et 
f.treleasei Elenkin) fig. 763-4. 
Cells barrel shaped to cylindrical, spores mainly single, positioned at a regular 
distance from the heterocyst. Cells are 2.5-4.5-(5.6)μ wide, 5.4-11μ long, 
spores are 5.5-7-(8.5)μ wide, 16-30μ long. Probably the following species 
belong to A.flos-aquae ; Anabaena sigmoidea Nygaard (fig.767), A.spiroides var. 
tumida Nygaard (fig.769) and A.spiroides f. minima Nygaard (fig.768). 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Notice 
 
 
Please note that these translations were produced to assist the scientific staff of the 
FBA (Freshwater Biological Association) in their research. These translations were 
done by scientific staff with relevant language skills and not by professional 
translators. 
 
 
 


Anabaena circinalis Rabenhorst and A.flos aquae Brebisson, ex Bornet et Flahault. [Translation from: Flora Slodkowodna Polski 2, 499-504, 1966. ]

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Anabaena circinalis Rabenhorst and A.flos aquae Brebisson, ex Bornet et Flahault. [Translation from: Flora Slodkowodna Polski 2, 499-504, 1966. ]

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