Klymiuk, Ashley A <br/><br/>
A lower Cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae).  [electronic resource] 

 -  American journal of botany  Jun 2012 
 - 1069-82 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>1537-2197 
<br/><br/><label>Standard No.: </label>10.3732/ajb.1100568  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biological Evolution<br/>British Columbia<br/>Fossils<br/>Ovule--anatomy & histology<br/>Phylogeny<br/>Picea--anatomy & histology<br/>Pollen--anatomy & histology<br/>Seeds--anatomy & histology<br/>Time Factors