''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 herbaceous plant in the rose family that grows naturally throughout much of the Northe ...

'' and '' Fragaria chiloensis'', 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, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively ...

count of 7

chromosomes A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are ...

. ''Fragaria'' × ''bringhurstii'' is

pentaploid Polyploidy is a condition in which the cells of an organism have more than one pair of ( homologous) chromosomes. Most species whose cells have nuclei ( eukaryotes) are diploid, meaning they have two sets of chromosomes, where each set contain ...

, 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 North America Plants described in 1999 Plant nothospecies {{rosoideae-stub