THE MORPHOLOGY OF POLLEN TETRADS AND VISCIN THREADS IN SOME TERTIARY,RHODODENDRON-LIKE ERICACEAE

Authors
Citation
R. Zetter et M. Hesse, THE MORPHOLOGY OF POLLEN TETRADS AND VISCIN THREADS IN SOME TERTIARY,RHODODENDRON-LIKE ERICACEAE, Grana, 35(5), 1996, pp. 285-294
Citations number
41
Categorie Soggetti
Plant Sciences
Journal title
GranaACNP
ISSN journal
00173134
Volume
35
Issue
5
Year of publication
1996
Pages
285 - 294
Database
ISI
SICI code
0017-3134(1996)35:5<285:TMOPTA>2.0.ZU;2-W
Abstract
The morphology of pollen tetrads and viscin threads is described in fo ssil Ericaceae pollen from various Eocene/Oligocene/Miocene localities in Europe (Germany, Austria), North America (eastern U.S.A.), and Asi a (eastern China). The typical characters of the tetrad configuration, the exine ornamentation and sculpturing, and especially the viscin th read morphology are extremely similar to or even indistinguishable fro m that in extant members of Rhododendron. All these pollen morphologic al features strongly suggest that all the investigated material can be assigned to a modern taxon of the Ericaceae: either to Rhododendroide ae or even to Rhododendron itself.