Pinuxylon woolardii sp. nov., a new petrified taxon of Pinaceae from the Miocene basalts of eastern Oregon

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Permanent URL	http://hdl.lib.byu.edu/1877/2494
Title	Pinuxylon woolardii sp. nov., a new petrified taxon of Pinaceae from the Miocene basalts of eastern Oregon
BYU Creator	Tidwell, William D.
Creator	Parker, Lee R. Folkman, Vaughn K.
Keywords	Pinuxylon woolardii; ray cells; Miocene strata; Oregon
Description/Abstract	Specimens of the new species Pinuxylon wollardii have been collected from Miocene strata near Kurkee, OR. These petrified specimens are unique in that, due to weathering, individual tracheids and ray cells can be separated for detailed SEM studies. This species is characterized by its high number of ray cells; numerous rays; large resin ducts which are commonly paired; primarily uniseriate pitting, two to five (usually three) small, oval or cirular pinoid pits per crossfield; and smooth walls on its transverse (ray) tracheids. The latter character relates this species to taxa in the subgenus Haploxylon of Pinus. Pinuxylon woolardii is most similar to the fossil species Pinuxylon parryoides and the extant species Pinus aristata, P. cembroides, P. edulis, P. monophylla and P. balfouriana. These modern species live in drier environments and at high elevatiosn that that suggested by the Miocene leaf floras which occur near the locality of P. wollardii.
Source	Pinuxylon woolardii sp. nov., a new petrified taxon of Pinaceae from the Miocene basalts of eastern Oregon. William D. Tidwell, Lee R. Parker, and Vaughn K. Folkman American Journal of Botany (November 1986), 73(11):1517-1524;
Publisher	Botanical Society of America
Date Original	1986-11
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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Pinuxylon woolardii sp. nov., a new petrified taxon of Pinaceae from the Miocene basalts of eastern Oregon

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