File:EB1911 Pteridophyta - Polypodium vulgare - archegonia.jpg

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Description

English: Polypodium vulgare: A, Unopened archegonium; o, ovum; k″, ventral canal cell; k′ neck-canal-cell. B, Mature opened archegonium.

Date

published 1911

Source

Encyclopædia Britannica (11th ed.), v. 22, 1911, “Pteridophyta,” fig. 9, p. 611.

Author

From Strasburger's Lehrbuch der Botanik

Permission
(Reusing this file)

This image comes from the 13^th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	15:41, 5 June 2017		718 × 396 (73 KB)	Bob Burkhardt	{{Information \|Description ={{en\|1=''Polypodium vulgare'': ''A'', Unopened archegonium; ''o'', ovum; ''k″'', ventral canal cell; ''k′'' neck-canal-cell. ''B'', Mature opened archegonium.}} \|Source =''Encyclopædia Britannica'' (11th ed....

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- Paprastoji šertvė