881 articles
Pistacia terebinthus
Pistacia terebinthus, the terebinth or turpentine tree, is a Mediterranean Anacardiaceae shrub or tree; fruit eaten as snack or coffee-like drink, resin used medicinally, IUCN Least Concern.
Pithecellobium
Pithecellobium (blackbead) is a genus of spiny mimosoid legume trees and shrubs in Fabaceae, tribe Ingeae, native from Mexico to Brazil and Florida to the Caribbean, with about 21 accepted species including the Madras thorn, Pithecellobium dulce.
Pithecellobium dulce
Pithecellobium dulce, Manila tamarind, Madras thorn, guamúchil, kamachile: a spiny Fabaceae tree native from Mexico to Peru, grown for its sweet edible seed aril, fodder, and timber, and invasive in Hawaii, Florida, and India.
Plukenetia
Plukenetia (sacha inchi, Inca peanut) is a pantropical genus of 25 liana and vine species in Euphorbiaceae, defined by 4-carpellate fruits and basilaminar nectaries; P. volubilis seeds yield omega-3-rich oil.
Plukenetia volubilis
Plukenetia volubilis, or sacha inchi, Inca peanut, maní estrella: a Euphorbiaceae climbing shrub native to South Tropical America, grown for seeds rich in omega-3 oil and protein.
Plum
Plum: stone fruit of Prunus, chiefly European plum Prunus domestica (hexaploid, prune and jam uses) and Japanese plum Prunus salicina (diploid, fresh market); second stone fruit crop after peach, ~12 million tons.
Poinsettia
Poinsettia (Euphorbia pulcherrima, cuetlaxochitl, flor de Nochebuena), a Mexican shrub grown for red winter bracts; introduced to the U.S. by Joel Poinsett in 1828; short-day flowering; low toxicity.
Poison ivy
Poison ivy (Toxicodendron radicans, formerly Rhus radicans) is a North American Anacardiaceae vine or shrub whose urushiol oil causes allergic contact dermatitis in 10–50 million Americans yearly; three leaflets, cross-reacts with poison oak and sumac.
Polygalaceae
Polygalaceae, the milkwort family, is a Fabales family of about 30 genera and 1,200 species with keel-like zygomorphic flowers; largest genus Polygala (about 750 species), New World clade now genus Senega.
Polygonum aviculare
Polygonum aviculare (prostrate knotweed, knotgrass, bian xu) is a prostrate annual knotweed of Polygonaceae, native to temperate Eurasia, a cosmopolitan weed with medicinal, diuretic use and herbicide-resistant populations.
Pome
A pome is a fleshy fruit of the rose family, such as the apple, pear, quince, or medlar, whose flesh derives from the hypanthium around a leathery core, the true fruit.
Pongamia
Pongamia (pongam, Indian beech, Millettia pinnata) is a genus of nitrogen-fixing legume trees in Fabaceae native from tropical Asia to the western Pacific; its oil-rich seeds (about 40% oil) are a biofuel feedstock, and it is used for medicine, shade, and land restoration.
Populus
Populus (poplars, aspens, cottonwoods) is a genus of about 61 accepted species of fast-growing dioecious trees in Salicaceae, native to the temperate Northern Hemisphere; major sources of pulp, plywood, and phytoremediation, and the model tree genus for genomics.
Populus alba
Populus alba (white poplar, abele, silver-leaf poplar) is a Salicaceae tree native from Central and Southern Europe to Xinjiang and the West Himalaya, with white-woolly leaf undersides, riparian habitat, timber and medicinal uses, and model status in drought stress research.
Populus balsamifera
Populus balsamifera, balsam poplar or tacamahac, is the northernmost American hardwood, a fast-growing Salicaceae floodplain tree from Newfoundland to Alaska, used for pulp and construction and hybridizing with P. trichocarpa.
Populus deltoides
Populus deltoides, eastern cottonwood (also plains cottonwood, necklace poplar), a fast-growing Salicaceae tree of North American floodplains; dioecious, millions of wind- and water-dispersed seeds, three subspecies, IUCN Least Concern.
Populus euphratica
Populus euphratica (胡杨), Euphrates or desert poplar, Salicaceae tree from North Africa to Mongolia; relict salt- and drought-tolerant riparian species, IUCN Least Concern, key to arid-land restoration.
Populus nigra
Populus nigra, the black poplar (Lombardy poplar is its cv. Italica), is a dioecious European riparian tree, a floodplain keystone species, threatened by habitat loss and hybrid introgression; Britain's native subsp. betulifolia has about 7,000 trees.
Populus tomentosa
Populus tomentosa (毛白杨), commonly the Chinese white poplar, is a deciduous tree of the willow family native to China and widely planted in the north for timber and pulp.
Populus tremula
Populus tremula, European or common aspen (Salicaceae), a temperate Eurasian and North African dioecious tree whose flattened leaf petioles make its leaves tremble; wind-dispersed fluffy seeds, wood for pulp and construction, IUCN Least Concern.
Populus tremuloides
Populus tremuloides, quaking or trembling aspen, is North America's most widespread tree, a clonal Salicaceae species regenerating by root suckers, with flattened petioles causing leaf quaking and aspen stands acting as natural firebreaks.
Populus trichocarpa
Populus trichocarpa, black cottonwood or western balsam poplar, is the largest western North American hardwood and the first tree genome sequenced (2006, ~500 Mb, 19 chromosomes), a riparian model tree and biofuel crop.
Portulaca oleracea
Portulaca oleracea, purslane or verdolaga (马齿苋), a cosmopolitan succulent weed and leafy vegetable; the first known C4 plant with drought-induced facultative CAM, rich in omega-3 ALA, IUCN least concern.
Potentilla erecta
Potentilla erecta (tormentil, erect cinquefoil) is a perennial Rosaceae herb of Europe to W. Siberia whose tannin-rich rhizome (Tormentillae rhizoma) is an EU traditional herbal medicine for mild diarrhoea and mouth inflammation.
Prosopis cineraria
Prosopis cineraria, khejri or ghaf, a Fabaceae desert tree native from Arabia to India, key arid-zone agroforestry species valued for leaf fodder, edible pods, fuelwood, and soil improvement.
Prunus
Prunus (plum, cherry, peach, almond, apricot genus) is a cosmopolitan Rosaceae genus of about 359 accepted drupe-bearing trees and shrubs, with three main phylogenetic clades and S-RNase gametophytic self-incompatibility requiring cross-pollination.
Prunus avium
Prunus avium, wild or bird cherry, sweet cherry, is a Rosaceae tree native from Europe to Afghanistan and North Africa, ancestor of cultivated sweet cherry, valued for premium hardwood and grown for fruit, with 224 synonyms.
Prunus cerasifera
Prunus cerasifera, the cherry plum or myrobalan plum (also Pissard plum, purpleleaf plum), is a diploid Eurasian Prunus tree used as a stone-fruit rootstock, ornamental, and wild genetic resource, native from SE Europe to the Himalaya.
Prunus domestica
Prunus domestica, the European plum, is a hexaploid fruit tree in the rose family cultivated for fresh fruit, prunes, and distilling, originating south of the Caucasus.
Prunus laurocerasus
Prunus laurocerasus, cherry laurel or common laurel, an evergreen Rosaceae shrub native from Serbia to northern Iran, widely grown for hedging, toxic leaves and seeds with cyanogenic glycosides, and invasive in parts of Central Europe.