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Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.
Rubus pensilvanicus, known commonly as Pennsylvania blackberry, is a prickly bramble native to eastern and central North America from Newfoundland south to Georgia, west as far as Ontario, Minnesota, Nebraska, Missouri, and Arkansas. The species is also established as a naturalized plant in California. [2] [3]
Second-year plants develop racemes of flowers each containing 5–20 flowers. [4] The flowers are typically 5-merous with large, white petals and light green sepals, borne in mid-spring. [5] Second-year plants are also capable of growing the fruit which gives the plant's common name, the blackberry. The fruits are compound drupes which change ...
Blackberry Blackberries Halved blackberry. Rubus fruticosus L. is the ambiguous name of a European blackberry species in the genus Rubus (part of the rose family). The name has been interpreted in several ways: The species represented by the type specimen of Rubus fruticosus L., which is also the type specimen of the genus Rubus. [1]
Rubus is a large and diverse genus of flowering plants in the rose family, Rosaceae, subfamily Rosoideae, commonly known as brambles. [3] [4] [5] Fruits of various species are known as raspberries, blackberries, dewberries, and bristleberries.
Rubus ursinus is a wide, mounding shrub or vine, growing to 0.61–1.52 metres (2–5 feet) high, and more than 1.8 m (6 ft) wide. [3] The prickly branches can take root if they touch soil, thus enabling the plant to spread vegetatively and form larger clonal colonies.
Rubus laciniatus, the cutleaf evergreen blackberry or evergreen blackberry, is a species of Rubus, native to Eurasia. It is an introduced species in Australia and North America . It has become a weed and invasive species in forested habitats in the United States and Canada, particularly in the Northeast and along the Pacific Coast , as well as ...
Rubus setosus, the bristly blackberry, is a North American species of flowering plant in the rose family. [2] It is widespread in much of central and eastern Canada (from Ontario to Newfoundland) and the northeastern and north-central United States (from New England west to Minnesota and south as far as North Carolina) [3] [4]