A new osmundaceous species from the Morrison Formation (Jurassic) of Utah

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Permanent URL	http://hdl.lib.byu.edu/1877/2510
Title	A new osmundaceous species from the Morrison Formation (Jurassic) of Utah
BYU Creator	Tidwell, William D.
Creator	Call, Victor B.
Keywords	Morrison Formation; Utah; Osmundacaulis
Description/Abstract	Specimens of a new arborescent Osmundacaulis were collected from a conglomerate in the upper strata of the Morrison Formation east of Ferron, Utah. These specimens contain 14-18 mm wide stems surrounded by adherent leaf bases and adventitious roots. Each base has stipular wings similar to those in other members of the Osmundaceae. The dissected xylem cylinder is composed of a series of xylem strands formed by wide, overlapping leaf gaps. As the trace develops, clusters of large, elongate parenchyma cells form externally to the phloem in the trace. These cells are similar to large parenchyma cells in O. nerii from souther Tasmania. The sclerenchyma in the stipular wings consists of many, scattered, small sclerotic strands. These specimens represent the second osmundaceous species from the Jurassic of North America and the second arborescent form from the Mesozoic of the Northern Hemisphere.
Source	A new osmundaceous species from the Morrison Formation (Jurassic) of Utah (in Program with abstracts of papers to be presented at the annual meetings of the Botanical Society of America with other affiliated societies at the University of Massachusetts, Taylor,) William D. Tidwell and Victor Call American Journal of Botany (May 1986), 73(5):716-717
Publisher	Botanical Society of America
Date Original	1986-05
Date Digital	2010-09
Language	English eng en
Publication Type	Abstracts
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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A new osmundaceous species from the Morrison Formation (Jurassic) of Utah

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