Progymnospermopsida

Progymnospermopsida

[prō¦jim·nō‚spər′mäp·səd·ə]
(paleontology)
A class of plants intermediate between ferns and gymnosperms; comprises the Devonian genus Archaeopteris.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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