Editing Rubus (section)

== Description ==

Bramble bushes typically grow as [[shrub]]s (though a few are [[Herbaceous plant|herbaceous]]), with their stems being typically covered in sharp [[Thorns, spines, and prickles|prickles]].<ref name="treesandshrubsonline" /> They grow long, arching shoots that readily root upon contact with soil,<ref>{{Cite web |title=Brambles and other woody weeds /RHS Gardening |url=https://www.rhs.org.uk/advice/profile?PID=256 |access-date=2016-02-15 |website=www.rhs.org.uk |archive-date=2024-05-24 |archive-url=https://web.archive.org/web/20240524114658/https://www.rhs.org.uk/weeds/brambles-and-other-woody-weeds |url-status=live }}</ref> and form a soil [[rootstock]] from which new shoots grow in the spring.<ref name="woodlands" /> The leaves are either [[evergreen]] or [[deciduous]], and [[Simple leaf|simple]], [[lobed]], or [[Compound leaf|compound]].<ref name="treesandshrubsonline" /> The shoots typically do not flower or set [[fruit]] until the second year of growth (i.e. they are [[Biennial plant|biennial]]).<ref name="woodlands">{{Cite web |title=Bramble or blackberry {{!}} Woodlands.co.uk |url=http://www.woodlands.co.uk/blog/woodland-flowers/pinkpurple-flowers/bramble-or-blackberry/ |access-date=2016-02-15 |website=www.woodlands.co.uk |archive-date=2016-09-14 |archive-url=https://web.archive.org/web/20160914051950/http://www.woodlands.co.uk/blog/woodland-flowers/pinkpurple-flowers/bramble-or-blackberry/ |url-status=live }}</ref> The rootstock is [[Perennial plant|perennial]].<ref>{{Cite web |title=Blackberry Planting, Spacing, and Trellising |url=https://www.aces.edu/blog/topics/crop-production/blackberry-planting-spacing-and-trellising/ |access-date=2023-09-27 |website=Alabama Cooperative Extension System |language=en-US |archive-date=2023-09-27 |archive-url=https://web.archive.org/web/20230927201557/https://www.aces.edu/blog/topics/crop-production/blackberry-planting-spacing-and-trellising/ |url-status=live }}</ref> Most [[species]] are [[plant sexuality|hermaphrodites]] with male and female parts being present on the same flower.<ref name="treesandshrubsonline">{{Cite web |title=Rubus - Trees and Shrubs Online |url=https://www.treesandshrubsonline.org/articles/rubus/ |access-date=2023-09-27 |website=www.treesandshrubsonline.org |archive-date=2023-09-27 |archive-url=https://web.archive.org/web/20230927194828/https://www.treesandshrubsonline.org/articles/rubus/ |url-status=live }}</ref> Bramble fruits are [[Fruit#Aggregate fruit|aggregate fruits]] formed from smaller units called [[drupe]]lets.<ref name="woodlands" />

Around 60-70% of species of ''Rubus'' are [[Polyploidy|polyploid]] (having more than two copies of each chromosome), with species ranging in [[ploidy]] from [[diploid]] (2x, with 14 chromosomes<ref>{{Cite web |title=Rubus all species {{!}} GDR |url=https://www.rosaceae.org/species/rubus/all |access-date=2023-09-27 |website=www.rosaceae.org |archive-date=2023-09-28 |archive-url=https://web.archive.org/web/20230928004350/https://www.rosaceae.org/species/rubus/all |url-status=live }}</ref>) to tetradecaploid (14x).<ref>{{Cite web |title=Small genomes in tetraploid Rubus L. (Rosaceae) from New Zealand and southern South America |url=https://www.ars.usda.gov/research/publications/publication/?seqNo115=327553 |access-date=2023-09-27 |website=www.ars.usda.gov |archive-date=2023-09-27 |archive-url=https://web.archive.org/web/20230927194825/https://www.ars.usda.gov/research/publications/publication/?seqNo115=327553 |url-status=live }}</ref>