Heterogenerataephyceae

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Heterogenerataephyceae

 

a large group of Phaeophyceae. (According to one system they are a class.) The sporophytes of Heterogenerataephyceae are macroscopic. They are 1 cm to several meters tall and sometimes have a complex structure. The gametophytes are microscopic.

Heterogenerataephyceae are often divided into two subclasses. Polystichineaephycidae are forms in which the cells are divided by longitudinal septa, and a true parenchymatous tissue forms. Haplostichineaephycidae are forms in which the thallus consists internally of threads, which form pseudoparenchymatous tissue, and in which the cells are not divided longitudinally. Heterogenerataephyceae are widely found in the seas. Algae of the genus Laminaria have the greatest practical significance.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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