1.
Science
; 157(3792): 1067-8, 1967 Sep 01.
Article
in English
| MEDLINE
| ID: mdl-17770429
ABSTRACT
Counts were made of pollen in traps formed by enclosed bark in two remnants of bristlecone pine, Pinus aristata Engelm., from the White Mountains of east-central California. The traps, dated by tree-rings at A.D. 350 and 1300 B.C., contained a major complex of pine-sagebrush pollen and traces of other species, representing the equivalent of the present vegetation.