4,295 articles
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.
Porella
Porella is a genus of about 120 taxa of leafy liverworts in the family Porellaceae, described by Linnaeus in 1753 with Porella pinnata as the type species.
Porellales
Porellales, an order of leafy liverworts (Jungermanniidae) sister to Jungermanniales, defined by bundled rhizoids, incubous bifid leaves and watersacs; includes Lejeuneaceae, the most species-rich liverwort family, and diversified epiphytically in Cretaceous angiosperm forests.
Portulaca
Portulaca (purslane) is the sole genus of Portulacaceae, about 100-153 succulent species worldwide. Includes Portulaca oleracea, the first known C4-CAM plant, with OL and AL clades and base chromosome x=9.
Portulaca grandiflora
Portulaca grandiflora, moss rose or onze horas, is a South American succulent Portulacaceae ornamental with C4 plus inducible CAM photosynthesis, sunlight-closing flowers, and worldwide garden naturalization.
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.
Portulacaceae
Portulacaceae, the purslane family (Caryophyllales), now holds only Portulaca, ca. 100 succulent C4 species, some also performing CAM; formerly a broad paraphyletic family of about 20 genera split into eight families.
Portulacaria afra
Portulacaria afra (spekboom, elephant bush) is a succulent shrub of southern Africa in Didiereaceae, used for bonsai, food, folk medicine, and large-scale thicket restoration and carbon sequestration.
Potamogeton
Potamogeton, the pondweeds, is a genus of aquatic flowering herbs named by Linnaeus in 1753, with 80 to 90 species in fresh and brackish waters worldwide.
Potamogeton natans
Potamogeton natans, broad-leaved or floating-leaf pondweed, is a perennial floating-leaved aquatic plant of Potamogetonaceae, native to the temperate and subtropical Northern Hemisphere, least concern (IUCN LC, G5), found in quiet waters up to about 1.5 m deep.
Potamogetonaceae
Potamogetonaceae, the pondweed family (formerly including Zannichelliaceae), is an Alismatales family of aquatic herbs in fresh and brackish waters worldwide, with 4-7 genera and about 90-95 species, type genus Potamogeton.
Potato
Potato (Solanum tuberosum, papa): Andean nightshade tuber domesticated near Lake Titicaca 10,000–7,000 years ago, the world's fourth most important food crop, spread to Europe in the 1570s and a staple by 1800.
Potentilla
Potentilla (cinquefoil), Rosaceae genus published by Linnaeus in 1753; 520 accepted species, subarctic to tropical-mountain range, five-petaled yellow flowers, achenes, medicinal phytochemistry, disputed generic limits.
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.
Pothos
Pothos is both a real Araceae genus (Pothos L., 1753, type P. scandens, 66 species) and the common name for the houseplant Epipremnum aureum, or devil's ivy, reclassified out of Pothos after its flowers were studied.
Potpourri
Potpourri (pot-pourri), from French for "rotten pot", is a fragrant mix of dried flower petals, herbs, spices, fixatives and essential oils used to scent rooms; also any medley or miscellany.
Pottiaceae
Pottiaceae, also called the Pottiaceae Hampe moss family, is the largest moss family by genera, about 1,400 species in 83 genera of Dicranidae, known for desiccation-tolerant mosses of harsh habitats and difficult taxonomy.
Pouteria
Pouteria Aubl. is a genus of about 171 accepted Sapotaceae trees and shrubs, type P. guianensis, native to the tropics and subtropics and centered in the Neotropics, with edible fruits such as abiu and canistel.
Pouteria sapota
Pouteria sapota, mamey sapote (zapote mamey), a Sapotaceae fruit tree native to Mexico and Central America, an ancient Mayan fruit with 8-20 cm red-fleshed berries, seed oil sapuyulo, and cultivation from Mexico to Southeast Asia and Florida.
Premna
Premna L. (also Premna integrifolia, agnimantha) is a genus of about 130 species of trees, shrubs, and lianas in Lamiaceae, subfamily Premnoideae, native to the Old World tropics and used in traditional medicine.
Primula
Primula (primroses), a genus of about 400-500 perennial herbs in Primulaceae, is the model taxon for heterostyly: pin and thrum flowers, a diallelic S locus, self-incompatibility, and repeated evolution of selfing homostyles.
Primula auricula
Primula auricula, commonly called auricula, bear's ear, or mountain cowslip, is a perennial primrose native to the Alps and other mountains of central and southern Europe, and a prized garden plant since the sixteenth century.
Primula elatior
Primula elatior (L.) Hill, the oxlip or true oxlip, is a distylous perennial woodland herb of Europe to Siberia, confined in Britain to East Anglian boulder-clay woods, hybridizing with P. vulgaris (P. × digenea) and P. veris (P. × media).
Primula meadia
Primula meadia (eastern shooting star, formerly Dodecatheon meadia) is a North American spring wildflower of prairies and open woods, moved into Primula in 2007, with buzz-pollinated nodding flowers and a G5 but edge-imperiled conservation profile.
Primula veris
Primula veris, the cowslip, is a yellow-flowered European perennial primrose with distylous pin and thrum flowers studied by Darwin, and flowers approved as a traditional EU expectorant for colds.
Primula vulgaris
Primula vulgaris (primrose), Primulaceae perennial herb native from Europe to W. Caucasus and Lebanon; pale-yellow winter-to-spring flowers, pin/thrum heterostyly controlled by an S-locus supergene, ant-dispersed seeds, not threatened in Britain but Vulnerable in Germany.
Primulaceae
Primulaceae, the primrose or myrsine family, is a eudicot family in Ericales. Formerly about 20 temperate herbaceous genera, it now includes Myrsinaceae, Theophrastaceae, and Maesaceae, with roughly 60-64 genera and 2,700 species in four subfamilies.
Prioria
Prioria Griseb. (1860) is a pantropical genus of 15 accepted legume tree species (Fabaceae, Detarioideae), including the Panama plywood timber cativo (P. copaifera) and the endangered African tola (P. balsamifera), formerly split as Kingiodendron, Oxystigma, and Gossweilerodendron.
Privet
Privet (Ligustrum), a genus of about 40 Oleaceae shrubs and small trees from Eurasia to Queensland, long used for clipped hedges; several species, notably Chinese privet (L. sinense), are major invasive weeds with toxic fruit.
Privet as an invasive plant
Privet (Ligustrum spp.), including Chinese privet (L. sinense), is invasive hedge shrubs forming dense thickets that displace native forest understory; bird-dispersed seed, root-crown sprouting, herbicide cut-stump control, no biocontrol.