pollen sac

American  

noun

Botany.

1. one of the cavities in an anther in which pollen is produced.

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pollen sac Scientific  

1. The microsporangium of a seed plant in which pollen is produced. The pollen sacs of angiosperms are located in the anthers, while those of conifers are located in the male cones.

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Etymology

Origin of pollen sac

First recorded in 1870–75

Example Sentences

Illustration A shows cross section of an anther, which has four lobes each containing a pollen sac, or microsporangium.

From Textbooks • Jan. 1, 2015

Inside the pollen sac is a layer called the tapetum, and within this ring are the microspore mother cells.

From Textbooks • Jan. 1, 2015

This drawing together is produced by a small weal, which appears as a more or less complete pollen sac, and in the same proportion the leaf approaches the simple form of a stamen.

From A History of Science — Volume 4 by Williams, Henry Smith

A true, little-modified petal is drawn together on its upper margin, and produces a pollen sac, while the rest of the petal takes the place of the stamen.

From A History of Science — Volume 4 by Williams, Henry Smith