Anabaena aeruginosa N.L.Gardner

• Region

  West Indies

• Country

  Puerto Rico

• Locality

  in river 5 km east of Coamo

• Coordinates

  18.079, -66.3106

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

NEW YORK
UCAL
R DEN

6	7	8	9 10 T XT v

The New York
copyright reserved Botanical Garden

THE NEW YORK BOTANICAL GARDEN

DARIUS OGDEN MILLS FUND

FRESHWATER ALGAE OF PORTO RICO
COLLECTED BY PROFESSOR N. WILLE
IN RIVER 5 KM. EAST OF COAMO JANUARY 8, 1915

i I7e)

Anabaena aeruginosa sp. nov.

Plate 12, figuke 11

Trichomes relatively short and straight, aggregated into
small masses or free-floating, 3.2-4 m diam., not attenuated; cells
bright aeruginous, subspherical, seemingly loosely attached to
each other; apical cell blunt-rounded; heterocysts like the cells
in form, 5-6 jj diam.; spores broadly dolioform, 2-4-catenate be-
tween the heterocysts, about 10 jj diam. and 1.5 p long, contents
densely and coarsely granular, bright aeruginous, walls smooth,
hyaline.

Growing in company with Anabaena Willei and other algae
about five kilometers east of Coamo, no. 237 b, type.

This species of Anabaena belongs in the Dolichospermum sec-
tion of the group, proposed by Kalfs (Nostoch. 325, 1850) but

has straight spores instead oi! curved ones, characteristic oi
most of the species of the section. Its closest affinity seems to
be A. oblonga De VVilden.

>Uvvu, & 7Uo.	V_	in']

11	Anabaena aeruginosa

A portion of a filament with resting cells m dis-
connected series among vegetative cells........................... * 500

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Determined by Francis Drouet

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00937837