4,295 articles
Prometheus (tree)
Prometheus (WPN-114) was a Great Basin bristlecone pine on Wheeler Peak, Nevada, cut down in 1964 by Donald R. Currey; its 4,862 rings made it the oldest tree then dated, about 4,900 years old.
Proso millet
Proso millet (Panicum miliaceum), also called common or broomcorn millet, is an ancient Chinese-domesticated warm-season cereal grown for birdseed, livestock feed, and gluten-free human food, with leading U.S. production in Colorado, Nebraska, and South Dakota.
Prosopis
Prosopis (mesquite) is a genus of spiny, nitrogen-fixing legume trees and shrubs of arid Americas, Africa and Asia, with indehiscent sweet pods, wide use as fodder and fuel, and major invasive impacts in over 100 countries.
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.
Protea
Protea (sugarbushes) is an African genus of about 100 Proteaceae species, 82 in South Africa, named by Linnaeus after Proteus; king protea P. cynaroides is South Africa's national flower.
Protea cynaroides
Protea cynaroides, the king protea or giant protea, is South Africa's national flower, a lignotuberous fynbos shrub of the Western Cape from the Cedarberg to Grahamstown, with artichoke-like flower heads 120-300 mm across, IUCN Least Concern, harvested for cut flowers.
Protea repens
Protea repens, the common sugarbush or Cape honey flower (syn. P. mellifera), is a 0.7-4.5 m South African Proteaceae shrub from the Bokkeveld Mountains to Grahamstown, with cream-to-red sticky-bracted flower heads, bird and insect pollination, and IUCN Least Concern status.
Proteaceae
Proteaceae, the protea family, a southern-hemisphere family of flowering plants in Proteales with about 80 genera and 1,750 species, centres of diversity in Australia and southern Africa, four-part flowers, and proteoid roots.
Proteales
Proteales, an order of basal eudicot flowering plants (APG IV), containing Nelumbonaceae, Platanaceae, Proteaceae, and Sabiaceae; includes proteas, sycamores, and the sacred lotus.
Prothallus
Prothallus (plural prothalli): the small, green, heart-shaped free-living gametophyte of ferns, bearing antheridia and archegonia; homosporous ferns allow gametophytic selfing, and fertilization requires water for flagellate sperm.
Protonema
Protonema (plural protonemata): the filamentous or thalloid first stage growing from a germinating bryophyte spore, with green chloronema and brown caulonema filaments, from which the leafy moss gametophore later buds.
Protoplast isolation
Protoplast isolation is a plant cell biology technique that enzymatically strips the cell wall, yielding wall-less cells used for transient gene expression, CRISPR editing, and single-cell sequencing.
Prumnopitys
Prumnopitys is a genus of three densely branched, dioecious podocarp conifers native to New Zealand and South America, established in 1860, with seeds fully embedded in a fleshy epimatium.
Prumnopitys andina
Prumnopitys andina, the lleuque or Chilean plum yew, is a vulnerable evergreen conifer native to south-central and southern Chile, grown for its sweet, grape-like cones.
Prune
Prune: a dried plum, and the prune-type cultivars of European plum (Prunus domestica), oval blue-purple fruit with high-sugar yellow flesh suited to drying; cultivars include Stanley, Improved French, and Early Italian.
Prunella vulgaris
Prunella vulgaris (self-heal, heal-all, Xiakucao 夏枯草), a perennial Lamiaceae herb native to the temperate Northern Hemisphere and Central America, used in Chinese medicine as the dried fruit spike and in pollinator-friendly lawns.
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 × yedoensis
Prunus × yedoensis (Somei-yoshino, Yoshino cherry) is a hybrid flowering cherry; the cultivated clone arose from P. spachiana f. ascendens × P. speciosa, while wild Jeju Island trees originated independently.
Prunus armeniaca
Prunus armeniaca, the apricot, a diploid stone fruit native to Central Asia to China with disputed two- or three-event domestication, misleading 'Armenian' name; Türkiye leads 2023 production (750,000 t); kernels contain amygdalin.
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 cerasus
Prunus cerasus, the sour or tart cherry, is a tetraploid Rosaceae tree from the avium × fruticosa hybrid origin, grown for acidic fruit used in pies and processing; Montmorency dominates U.S. production, centered in Michigan.
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.
Prunus mahaleb
Prunus mahaleb, the mahaleb or St. Lucie cherry (Cerasus mahaleb), a Rosaceae tree native from Europe to Central Asia and Morocco, source of the mahleb spice and a major cherry rootstock.
Prunus mume
Prunus mume, also called mei, ume, or Japanese apricot, is a Rosaceae tree native to southwest China, blooming fragrant flowers in winter and yielding acidic fruit used for umeboshi, medicine, and liquor.
Prunus padus
Prunus padus (bird cherry, European bird cherry, Mayday tree), Rosaceae tree of temperate Eurasia and Morocco; fragrant white racemes, black fruit, Least Concern, invasive ornamental in Alaska.
Prunus salicina
Prunus salicina Lindl., the Japanese or Chinese plum (formerly P. triflora), a diploid Rosaceae stone-fruit tree native to China; source of most fresh-market plums, with a 318.6-Mb genome and high sharka susceptibility.
Prunus serotina
Prunus serotina, black cherry or rum cherry, a North American Rosaceae tree, largest native cherry and only commercially valuable one, Allegheny Plateau timber, invasive in European forests.
Prunus serrulata
Prunus serrulata, the Japanese cherry or hill cherry, is a deciduous cherry tree native to China and Korea and a parent of many ornamental flowering cherry cultivars.