Interconnected reproductive and vegetative remains of Populus (Salicaceae) from the middle Eocene Green River Formation, northeastern Utah

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Permanent URL	http://hdl.lib.byu.edu/1877/2495
Title	Interconnected reproductive and vegetative remains of Populus (Salicaceae) from the middle Eocene Green River Formation, northeastern Utah
BYU Creator	Tidwell, William D.
Creator	Manchester, Steven R. Dilcher, David L.
Keywords	Populus; fruits; Tertiary period; Utah
Description/Abstract	A new specimen from the Middle Eocene Evacuation Creek Member of the Green River Formation in northeastern Utah shows a twig with several leaves of Populus wilmattae Crockrell and a fruiting raceme attache. This specimen establishes for the first time the type of fruits borne by P. wilmattae and provides additional characters with which to assess its taonomic and evolutionary status. An associated seed shows attached placental hairs like those of extant species of Populus. The Green River fossil differs from extant Populus species in having basically palmate leaf venation and in bearing its fruiting axis on a young twig. In other aspects, the fossil species is remarkably similar to the extant species Populus mexicana.
Source	Interconnected reproductive and vegetative remains of Populus (Salicaceae) from the middle Eocene Green River Formation, northeastern Utah. Steven R. Manchester, David L. Dilcher, and William D. Tidwell American Journal of Botany (January 1986), 73(1):156-160;
Publisher	Botanical Society of America
Date Original	1986-01
Date Digital	2010-09
Language	English eng en
Publication Type	Articles
Type	Text
Format	application/pdf
Owning Institution	Brigham Young University
BYU College	College of Physical and Mathematical Sciences
BYU Department	Geological Sciences
Copyright Status	(c) 1986 Botanical Society of America;
Copyright Use Information	http://www.lib.byu.edu/generic_copyright.html

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Interconnected reproductive and vegetative remains of Populus (Salicaceae) from the middle Eocene Green River Formation, northeastern Utah

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