III. THE CONTRIBUTION OF F. SCARIOSA TO THE EVOLUTION OF POLYPLOIDS IN SECTIONS BOVINAE AND SCARIOSAE
STUDIES IN FESTUCA
Article first published online: 2 MAY 2006
Volume 71, Issue 3, pages 523–532, May 1972
How to Cite
BORRILL, M. (1972), STUDIES IN FESTUCA. New Phytologist, 71: 523–532. doi: 10.1111/j.1469-8137.1972.tb01953.x
- Issue published online: 2 MAY 2006
- Article first published online: 2 MAY 2006
- (Received 10 July 1971)
The cytogeographic distribution and morphology of Festuca taxa in sections Bovinae and Scariosae has been compared with the results of experimental hybridization between them. Two groups have been established, the first is predominantly Moroccan and includes F. mairei (2n= 28), F. arundinacea varieties atlantigena forma pseudo-mairei (2n= 56), letourneuxiana and cirtensis (2n= 70).
These taxa are closely related to the diploid F. scariosa endemic in the Spanish Sierra Nevada. Their distinctive morphological features are due to the inclusion of the scariosa genome. The second group, predominantly European, including F. arundinacea var. glaucescens (2n= 28) and F. arundinacea var. genuina (2n= 42), is similarly associated with the diploid F. pratensis. It is suggested that evolution in this species complex involved opportunities in a previous era for hybridization between tetraploid taxa now separated geographically. From such hybrids the higher polyploids can be derived.