''Fragaria'' × ''bringhurstii'' is a naturally occurring hybrid species of wild strawberry native to the West Coast of the United States. The species results from the natural intercrossing of ''

Fragaria vesca ''Fragaria vesca'', commonly called the wild strawberry, woodland strawberry, Alpine strawberry, Carpathian strawberry or European strawberry, is a Perennial plant, perennial herbaceous plant in the Rosaceae, rose family that grows naturally thro ...

'' and ''

Fragaria chiloensis ''Fragaria chiloensis'', the beach strawberry, Chilean strawberry, or coastal strawberry, is one of two species of wild strawberry that were hybridized to create the modern garden strawberry (''F. × ananassa''). It is native to the Pacific Oce ...

'', native species whose ranges overlap in that region. All strawberries have a base

haploid Ploidy () is the number of complete sets of chromosomes in a cell (biology), cell, and hence the number of possible alleles for Autosome, autosomal and Pseudoautosomal region, pseudoautosomal genes. Here ''sets of chromosomes'' refers to the num ...

count of 7

chromosomes A chromosome is a package of DNA containing part or all of the genetic material of an organism. In most chromosomes, the very long thin DNA fibers are coated with nucleosome-forming packaging proteins; in eukaryotic cells, the most importa ...

. ''Fragaria'' × ''bringhurstii'' is

pentaploid Polyploidy is a condition in which the biological cell, cells of an organism have more than two paired sets of (Homologous chromosome, homologous) chromosomes. Most species whose cells have Cell nucleus, nuclei (eukaryotes) are diploid, meaning ...

, having 5 pairs of these chromosomes for a total of 35 chromosomes, 7 from the ''F. vesca'' parent, and 28 from the ''F. chiloensis'' parent. Because of this odd number of chromosomes, this species possesses only limited fertility, due to problems of chromosome pairing during meiosis. However the plants readily reproduce vegetatively through runnering.

References

bringhurstii Hybrid fruit Garden plants of North America Groundcovers Flora of Northern America Plants described in 1999 Plant nothospecies {{rosoideae-stub