The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a theory on the origin of the flower according to which the flowers of angiospermous plants developed from the meeting of unisexual (male or female) flowers as a result of the shortening of the axis of the inflorescence of gymnospermous plants.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.