Keywords
Pinuxylon woolardii, ray cells, Miocene strata, Oregon
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.
Original Publication Citation
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
BYU ScholarsArchive Citation
Tidwell, William D.; Parker, Lee R.; and Folkman, Vaughn K., "Pinuxylon woolardii sp. nov., a new petrified taxon of Pinaceae from the Miocene basalts of eastern Oregon" (1986). Faculty Publications. 1448.
https://scholarsarchive.byu.edu/facpub/1448
Document Type
Peer-Reviewed Article
Publication Date
1986-11-01
Permanent URL
http://hdl.lib.byu.edu/1877/2494
Publisher
Botanical Society of America
Language
English
College
Physical and Mathematical Sciences
Department
Geological Sciences
Copyright Status
© 1986 Botanical Society of America;
Copyright Use Information
http://lib.byu.edu/about/copyright/