Fragaria: the genus of strawberries
Fragaria is the botanical genus that contains strawberries—perennial plants in the rose family valued for their fragrant, red accessory fruits, wild relatives, cultivation, and role in breeding and cuisine.
Overview
Fragaria is the Latin name applied in botanical classification to the group of plants commonly called strawberries. Members of this genus belong to the rose family and include about twenty recognized species and many hybrids. The best known cultivated form is the garden strawberry, while other members are often referred to as wild strawberries. The name and classification are used in scientific literature and horticulture to distinguish these plants from superficially similar fruiting species.
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Characteristics
Fragaria plants are perennial herbs with a crown, trifoliate leaves and usually produce stolons (runners) for vegetative spread. Flowers are typically white (sometimes pink) with five petals, and they develop into an accessory fruit: the swollen receptacle that we eat carries many small true fruits called achenes on its surface. This structure is why a strawberry is not a true botanical berry. The plants vary in size, flavour and cold tolerance across species.
History and development
Wild Fragaria species occur across temperate regions of the Northern and Southern Hemispheres. Several native species were brought into cultivation in different regions, and the modern garden strawberry arose after hybridization between New World and South American species introduced into Europe. Over centuries breeders selected larger, sweeter and more easily harvested forms, producing the commercially dominant Fragaria × ananassa and numerous cultivars adapted to different climates and markets.
Uses, cultivation and importance
Strawberries are grown for fresh consumption, processing into jams and desserts, and as ornamental plants. They have culinary importance worldwide and are also used in confectionery and flavourings. Cultivation typically involves propagation by runners, soil prepared for good drainage, and attention to pests and fungal diseases which commonly affect crops. Strawberries are a source of vitamin C and phytochemicals that contribute to aroma and antioxidant properties.
Species, breeding and distinctions
- Fragaria × ananassa: the common garden strawberry, a hybrid that dominates commercial production.
- Wild species such as Fragaria vesca (woodland strawberry) and Fragaria virginiana retain smaller fruit and are used in breeding for flavour and hardiness.
- Some look‑alikes, like mock strawberries, differ in botanical details and are not in the same genus; identification depends on flower and fruit structure.
Notable facts and research
Fragaria species have been the subject of genetic and horticultural research; several genomes and genetic maps have helped breeders improve disease resistance, shelf life and flavour. Conservation of wild relatives is valued because they harbour traits useful for adapting strawberries to changing climates and pests. For introductions and nomenclature consult botanical resources and horticultural guides: see Latin name and genus treatments linked to authoritative flora entries for more detail.
Further reading and resources are available for taxonomy, cultivation methods and cultivar lists; practical guides and scientific articles provide region‑specific advice on soil, pruning, and pest control. For general information on plant families and related genera see resources on the rose family and horticultural databases. For basic botanical descriptions consult entries that treat the fruit morphology and reproductive biology of strawberry species.
For an introduction to the genus and its uses in gardens and agriculture, see overviews that cover species lists, propagation, and culinary uses, or specific pages that summarize the genus Fragaria and its cultivated forms.
Description
Strawberries are perennial herbaceous plants. They are usually soft or silky-haired, with a thick, weakly woody "rootstock" that sprouts thread-like stolons. The stolons take root and form new rosettes (called blastochory). The alternate, basal, long-stalked stem leaves are usually three-fingered, rarely five-fingered. The stipules are attached to the base of the petiole.
Strawberries bear white, rarely yellowish flowers that appear after the end of the cold period. They are usually several in umbels at the top of the erect, arm-leaved stem. The flower cup bears five green sepals and five rounded corollas. Between the sepals proper are five more, smaller stipules (epicalyx). There are many stamens. Numerous free carpels sit on the convex receptacle. When ripe, the receptacle forms a juicy, fleshy false berry.
The fruits in the biological sense are small yellowish to reddish, one-seeded nutlets (according to another view achenes) on the surface of the red pseudo-fruit. The ovaries form one nutlet each, which are moved apart by the growth of the later striking red flower axis during the ripening period. Animals that eat the conspicuous strawberry fruit excrete the small hard-shelled nutlets that are found on the flesh of the fruit, so that the nutlets - provided they find suitable site conditions - can germinate (so-called endochory). In Europe, mammals such as red foxes, badgers, hedgehogs, bank voles and dormice; birds such as blackbirds, redstarts, robins, blackcaps and invertebrates such as Roman snails, some beetle species and millipedes are attracted to the fruits. They are thus involved in their dispersal. Ants even drag the fruit into their burrows, feed the pulp to their larvae and then carry the remaining nutlets away again. Strawberries, however, do not only use endochory and blastochory as dispersal mechanisms. Fruits that remain on the stems dry out after some time, with the nutlets falling off. This mechanism is called barochory.
Types
The genus Fragaria includes more than 20 species and their hybrids. In all strawberry plants, the single chromosome set is composed of seven chromosomes, but there are differences in the degree of polyploidy. Thus, species and hybrids with double (diploid), quadruple (tetraploid), sixfold (hexaploid), eightfold (octoploid) and tenfold (decaploid) chromosome set occur, but also hybrids with an odd number of chromosomes such as 35 in a fivefold set (pentaploid).
diploid
- Fragaria bucharica Losinsk. , Western Himalaya
- Fragaria chinensis Losinsk. , China
- Fragaria daltoniana J. Gay, Himalaya
- Fragaria iinumae Makino, Japan and Far East Russia
- Fragaria mandschurica Staudt, North China
- Fragaria nilgerrensis Schltdl. ex J. Gay, Southeast Asia
- Fragaria nipponica Makino, Honshu and Yakushima (Japan)
- Fragaria nubicola (Hook. f.) Lindl. ex Lacaita, Himalaya
- Fragaria pentaphylla Losinsk. , North China
- Fragaria vesca L. or wild strawberry, Europe, North Asia and North America
- Fragaria viridis (Duchesne) Weston or cracked strawberry, Europe and Central Asia
- Fragaria yezoensis Hara, see F. nipponica ssp. nipponica
- Fragaria × bifera Duchesne, (F. vesca × viridis) hybrid, Europe
tetraploid
- Fragaria corymbosa Losinsk. , Far East Russia, China
- Fragaria gracilis Losinsk. , Northwest China
- Fragaria moupinensis (Franch.) Cardot, North China
- Fragaria orientalis Losinsk. , Far East Russia
- Fragaria tibetica Staudt & Dickoné, China
pentaploid
- Fragaria × bringhurstii Staudt, California Pacific Coast
hexaploid
- Fragaria moschata (Duchesne) Weston or musk strawberry, Europe
octoploid
- Fragaria virginiana Mill. or scarlet strawberry, North America
- Fragaria chiloensis (L.) Duchesne or Chile strawberry, North and South American Pacific coast and Hawaii
- Fragaria × ananassa subspecies cuneifolia, (F. chiloensis × virginiana) hybrid, North America
- Fragaria × ananassa (Duchesne) Decne. & Naudin or garden strawberry, hybrid of scarlet and chile strawberry, cultivated worldwide.
decaploid
- Fragaria iturupensis Staudt, on the Kuril Island Iturup
- Fragaria virginiana subspecies platypetala Mill. , Oregon (North America)
- Fragaria × vescana Rud. Bauer & A. Bauer, hybrid of garden and wild strawberry
The strawberry genus does not include some similar-looking and closely related species of cinquefoil such as the mock strawberry (Potentilla indica) and the strawberry cinquefoil (Potentilla sterilis). The strawberry trees, so called because of their fruits, on the other hand, belong to the heather family.
Related articles
Author
AlegsaOnline.com Fragaria: the genus of strawberries Leandro Alegsa
URL: https://en.alegsaonline.com/art/35967
Sources
- ars-grin.gov : "Fragaria"
- nvsuk.org.uk : Official website
- inhs.uiuc.edu : "achenes"
- inhs.uiuc.edu : "Aggretage Fruits"
- carnegiemuseums.org : "The Strawberry: A Multiple Fruit"
- species.wikimedia.org : Fragaria