4,295 articles
Ascophyllum nodosum
Ascophyllum nodosum (knotted wrack, egg wrack, rockweed) is a North Atlantic brown fucoid seaweed of sheltered intertidal rocks, harvested for alginates, seaweed meal, fertilizers, and biostimulants.
Asimina
Asimina (pawpaw) is the only temperate-climate genus of the tropical custard apple family Annonaceae, native to eastern North America; its species A. triloba bears the largest edible fruit native to North America.
Asimina triloba
Asimina triloba (pawpaw, custard apple), a temperate Annonaceae tree of eastern North America bearing the largest edible native U.S. fruit; protogynous, self-incompatible flowers, acetogenin-bearing pulp, seeds needing cold stratification.
Asparagaceae
Asparagaceae (asparagus family) is a cosmopolitan Asparagales family of about 150 genera and 2,595 species, absorbing Agavaceae, Hyacinthaceae, Dracaenaceae, and Eriospermaceae under APG; includes Asparagus, Agave, Yucca, Dracaena.
Asparagales
Asparagales (Link, 1829), largest monocot order: ~1,030 genera, ~39,000 species, 14 APG IV families including Orchidaceae, Asparagaceae, Amaryllidaceae, Iridaceae; phytomelan seeds, crown age ~110 Ma.
Asparagus
Asparagus (Asparagus officinalis L., garden asparagus) is a dioecious perennial Asparagaceae herb native from Europe to Mongolia, grown for edible spring spears; green and white types are one species, white produced by excluding light, harvest starting in year three.
Asparagus (genus)
Asparagus is a genus of about 211 accepted perennial species in Asparagaceae, native from Europe and Africa to northern Australia, with leaf-like cladodes, a South African diversity center, and the crop species Asparagus officinalis.
Asparagus aethiopicus
Asparagus aethiopicus, Sprenger's asparagus or asparagus fern, is a South African Asparagaceae perennial, long misnamed A. densiflorus or A. sprengeri, widely cultivated as an ornamental and invasive in Florida and Australia.
Asparagus racemosus
Asparagus racemosus (Shatavari, Satavari) is a climbing Asparagaceae plant native from tropical Africa to N. Australia whose tuberous roots, rich in steroidal saponins such as shatavarin-IV, are used in Ayurveda as a galactagogue and tonic.
Asparagus setaceus
Asparagus setaceus (asparagus fern, lace fern, plumosa fern, formerly Asparagus plumosus) is a spiny climbing Asparagaceae plant from Ethiopia to South Africa, not a true fern; grown as a houseplant and florist foliage, with toxic berries and invasive status in several regions.
Aspen
Aspen, chiefly quaking aspen (Populus tremuloides), is North America's most widely distributed tree, a clonal species regenerating by root suckering and seed, valued for biodiversity and acting as a natural wildfire firebreak.
Asphodelaceae
Asphodelaceae is a family of monocot flowering plants in the order Asparagales, mostly Old World perennials and succulents, named in 1789 and best known for aloe, haworthia, and kniphofia.
Asphodelus
Asphodelus (asphodel) is a genus of about 18 perennial herbs in Asphodelaceae, native from Macaronesia and the Mediterranean to the Indian Subcontinent, used in traditional medicine and phytochemistry.
Aspidistra
Aspidistra (cast-iron plant genus) is a genus of rhizomatous Asparagaceae herbs, subfamily Nolinoideae, native from the eastern Himalaya to Japan, with over 200 species and fungus-gnat pollination; A. elatior is the familiar houseplant.
Aspidosperma
Aspidosperma is a genus of trees in the dogbane family, Apocynaceae, native from Mexico to Argentina, with 42 of its 80 accepted species occurring in Brazil.
Aspleniaceae
Aspleniaceae, the spleenwort family, is a cosmopolitan fern family in Polypodiales with two genera, Asplenium (over 700 species) and Hymenasplenium (~30), clathrate scales, and elongate linear sori.
Asplenium
Asplenium, known as spleenworts, is a large genus of ferns in the family Aspleniaceae, first published by Linnaeus in 1753, with over 700 species worldwide.
Asplenium adiantum-nigrum
Asplenium adiantum-nigrum, black spleenwort, is a perennial Aspleniaceae fern with dark stipes and 2-3-pinnate fronds, an allotetraploid hybrid native to Eurasia, Africa, Macaronesia, western North America, and Hawaii.
Asplenium ceterach
Asplenium ceterach (Ceterach officinarum), the rustyback or scale fern, is a European–Macaronesian lithophytic spleenwort with rusty scales on the frond underside, resurrection-plant desiccation tolerance, 2n = 144 tetraploidy, and Least Concern status.
Asplenium hybrids
Asplenium hybrids, crosses between spleenwort species (Asplenium, Aspleniaceae), are frequent and often sterile with aborted spores; examples include A. × heufleri and A. × shikokianum, and chromosome doubling of hybrids has produced allotetraploid species such as A. majoricum, sometimes recurrently.
Asplenium nidus
Asplenium nidus, the bird's nest fern (Neottopteris nidus), is a large tropical epiphytic fern of Aspleniaceae with shiny strap-shaped fronds up to 200 cm, native from Madagascar and Asia to Australia and the Pacific, least concern, and a popular ornamental.
Asplenium pinnatifidum
Asplenium pinnatifidum, lobed spleenwort, is an eastern North American allotetraploid fern (2n=144) from A. montanum × rhizophyllum, growing on acidic sandstone cliffs and producing hybrids ×trudellii, ×gravesii, ×kentuckiense, and ×herb-wagneri.
Asplenium platyneuron
Asplenium platyneuron (ebony spleenwort) is an evergreen spleenwort fern of eastern North America and southern Africa, with once-pinnate dark-rachised fronds, dimorphic fertile and sterile leaves, 2n=72, and a role as diploid progenitor of Appalachian Asplenium hybrids.
Asplenium rhizophyllum
Asplenium rhizophyllum, walking fern (doradille ambulante), a small evergreen spleenwort of eastern North America whose leaf tips root and form new plants; grows on mossy limestone, 2n=72, parent of A. ebenoides and A. pinnatifidum.
Asplenium trichomanes
Asplenium trichomanes, maidenhair spleenwort, is a small evergreen rock fern of the Aspleniaceae, described by Linnaeus in 1753, with dark brown stipes, once-pinnate fronds, diploid 2n=72 and tetraploid 2n=144 cytotypes, and a G5/LC conservation status.
Aster (genus)
Aster (genus), Aster L. (1753), a genus of daisy-family (Asteraceae) herbs now restricted mainly to temperate Eurasia; former American asters moved to Symphyotrichum, Eurybia, and others.
Asteraceae
Asteraceae (Compositae), the sunflower or aster family, is the largest flowering plant family with 24,000–30,000 species in 1,600–1,700 genera, defined by florets packed into a capitulum, united anthers, and pappus-bearing achenes; Late Cretaceous South American origin.
Asterales
Asterales (キク目) is an order of flowering plants, about 10% of angiosperms, in the campanulid clade, with 11-12 families dominated by Asteraceae and Campanulaceae; monophyletic, of Gondwanan Late Cretaceous origin.
Asterids
Asterids, a major eudicot clade of flowering plants with over 80,000 species in about 100 families and 17 APG IV orders, including Asteraceae and Rubiaceae; origin dated to the Aptian (~121 Ma), fossils from the Turonian (~89 Ma).
Astilbe
Astilbe (false spirea, false goat's beard) is a genus of Saxifragaceae perennials with feathery summer flower plumes, native from Himalaya to East Asia and eastern North America; shade- and moisture-loving garden plants with hundreds of hybrids from George Arends' breeding.