Parastichy

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 It might be outdated or ideologically biased.

Parastichy

 

an oblique, spiral row of crowded leaves, scales, or flowers. Parastichy is observed in plants with short stems marked by whorled phyllotaxy: the cones of conifers and various inflorescences (for example, heads of Compositae) often have a series of crisscross parastichies curving in a clockwise or counterclockwise direction.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The syncephalium subunit primordia (SSPs) are initiated acropetally in orderly parastichies on the capitulum.