881 articles
Rosa canina
Rosa canina, the dog rose or common briar, is a scrambling Rosaceae shrub native from Europe to Central Asia, with vitamin C-rich rose hips, valued in food and herbal medicine, and invasive in Australia and Argentina.
Rosa gallica
Rosa gallica, the French rose or apothecary's rose (Rosa gallica var. officinalis), is a suckering tetraploid shrub native from Europe to the Caucasus and N. Iraq, progenitor of the Gallica garden roses, once-flowering, used in perfumery, medicine, and food.
Rosa multiflora
Rosa multiflora (multiflora rose, Japanese rose, baby rose), a scrambling Rosaceae shrub native to East Asia, introduced to North America as rootstock and living fence, now an invasive thicket-forming pasture weed.
Rosa rugosa
Rosa rugosa (Japanese rose, beach rose) is a hardy suckering shrub rose native to coastal East Asia, grown for fragrant flowers and large vitamin-C-rich hips, and invasive in coastal dunes of Europe and North America.
Rosaceae
Rosaceae (rose family), Rosoideae, Rosales. Cosmopolitan family of ~92 genera and 2,800-5,000 species centered in the north temperate zone, including apples, cherries, plums, strawberries, and roses, widely grown in botanical garden collections.
Rosales
Rosales, the rose order of flowering plants, has nine families, 263 genera, and about 8,010 species including Rosaceae, Ulmaceae, Moraceae, and Urticaceae; it belongs to the nitrogen-fixing clade of fabids.
Rose
Rose (genus Rosa, family Rosaceae), also called China rose yuejihua in key lineage Rosa chinensis; Northern Hemisphere genus of about 350 prickly shrub species, five-petaled flowers, hips with achenes, and over 30,000 cultivated garden varieties.
Rose (disambiguation)
Rose (disambiguation): the genus Rosa (flowering plant, ~200-291 species), a female given name and surname of multiple origins, a light crimson color, and derived terms including sub rosa and the rose pangenome.
Rose hip
Rose hip (rose haw, rose hep): the accessory fruit of Rosa, a swollen hypanthium enclosing true achenes. Rich in vitamin C (400–1500 mg/100 g), used in foods, supplements (GOPO, osteoarthritis), and seed oil; differs from true drupes or berries.
Roselle (plant)
Roselle (Hibiscus sabdariffa, karkade, red sorrel, Florida cranberry) is a Malvaceae shrub grown for its red calyces used in tea, jam, and coloring; major producers China, Sudan, Thailand; lowers blood pressure in trials.
Rosids
Rosids: a major eudicot clade of flowering plants with about 140 families and one-third of angiosperm species, split into fabids and malvids, crown age 115-93 Mya, recircumscribed in APG V.
Rotala
Rotala (rotala, dwarf rotala, roundleaf toothcup) is a genus of about 71–75 aquatic herbs in Lythraceae, established by Linnaeus in 1771; R. rotundifolia is a Category II invasive weed in south Florida and a popular aquarium plant.
Rowan
Rowan, also called mountain ash, is a small deciduous tree of the rose family, native to Europe and temperate Asia, known for its bright red autumn berries.
Rubus
Rubus is the rose-family genus of blackberries, raspberries, and brambles, with roughly 700 to over 1400 species, biennial prickly canes, aggregate drupelet fruits, apomixis, and polyploid, hybrid-driven taxonomy revised into 10 subgenera in 2023.
Rubus caesius
Rubus caesius L., the European dewberry, is a scrambling Rosaceae shrub native from Europe to Xinjiang and the W. Himalaya, with trailing glaucous stems, white flowers, and bluish-black few-drupelet fruit.
Rubus chamaemorus
Rubus chamaemorus, the cloudberry (hjortron, bakeapple, aqpik), is a dioecious circumboreal bog herb of Rosaceae with amber aggregate fruits, rich in vitamin C and ellagitannins, harvested wild across Scandinavia and North America.
Rubus fruticosus
Rubus fruticosus L. (blackberry, bramble, Rubus fruticosus agg.) is a European Rosaceae scrambling shrub published by Linnaeus in 1753; an apomictic aggregate of over 2,000 microspecies, cultivated for its black drupelet fruit and used in food and herbal medicine.
Rubus leucodermis
Rubus leucodermis, whitebark or western black raspberry, is a western North American Rosaceae shrub with whitish waxy canes, black raspberries, two varieties, and use in black raspberry breeding for RBDV resistance.
Rubus occidentalis
Rubus occidentalis, black raspberry or blackcap, a North American Rosaceae bramble (subgenus Idaeobatus, 2n=14) grown mainly in Oregon, with anthocyanin-rich fruit distinct from red raspberry and blackberry.
Rubus phoenicolasius
Rubus phoenicolasius (wineberry, Japanese wineberry) is an East Asian Rosaceae shrub introduced to the US in 1890 for breeding, now invasive in the eastern US, with red-hairy canes, edible fruit, tip-rooting, and higher competitive ability than native blackberries.
Ruta graveolens
Ruta graveolens, common rue, is an aromatic Rutaceae subshrub native from the N. Balkan Peninsula to Crimea, cultivated as a medicinal herb; furanocoumarins make it phototoxic and abortifacient.
Rutaceae
Rutaceae, the rue or citrus family (Rutaceae Juss., 1789), is a Sapindales family of 161 genera and 2,070 species of aromatic trees, shrubs and lianas with pellucid oil glands, including Citrus, Pilocarpus, and Zanthoxylum.
Salicaceae
Salicaceae, the willow family (Salix, Populus), is a family of about 54 genera and over 1,400 species of trees and shrubs in the order Malpighiales, expanded from two genera to include former Flacourtiaceae, with major timber and environmental uses.
Salicornia
Salicornia (glasswort, samphire, sea asparagus) is a genus of about 35 to 64 accepted succulent halophyte species in Amaranthaceae, first published by Linnaeus in 1753, growing on temperate and subtropical coasts and saline inland areas, with optimal growth near 200 mM NaCl and uses as food, biofuel, and phytoremediation crop.
Salix × fragilis
Salix × fragilis (crack willow, brittle willow) is a hybrid willow, S. alba × S. euxina, native to Türkiye and naturalized worldwide; a 2009 redefinition and 2022 challenge surround its name.
Salix alba
Salix alba, white willow, is a 25 m Eurasian Salicaceae tree with silky silvery leaf undersides, dioecious catkins, salicin-rich bark used to develop aspirin, and rare hybridization with S. fragilis.
Salix babylonica
Salix babylonica, the weeping willow or Babylon weeping willow, is a Salicaceae tree native to northern and eastern China and Korea, named by Linnaeus in 1753, widely planted as an ornamental and invasive in parts of South Africa, Australia, and Florida.
Salix caprea
Salix caprea (goat willow, pussy willow), a dioecious Eurasian pioneer willow described by Linnaeus in 1753, flowering in early spring; introduced and naturalized in North America and assessed for weed risk in Australia.
Salix herbacea
Salix herbacea (dwarf willow, snowbed willow), a dioecious clonal dwarf willow of subarctic and subalpine Europe and North America, forming mats under 10 cm, common in snowbeds, sensitive to earlier snowmelt.
Salix nigra
Salix nigra (black willow, swamp willow) is the largest and only commercially important North American willow, a fast-growing, short-lived dioecious tree of eastern US, Canadian, and Mexican floodplains, IUCN Least Concern, widely used for streambank stabilization.