4,295 articles
Dichanthium
Dichanthium (bluestem) is a genus of about 20 Old World tropical C4 grasses in Poaceae, tribe Andropogoneae, related to Bothriochloa; D. annulatum and allies are major drought-tolerant tropical forage and erosion-control grasses.
Dichanthium aristatum
Dichanthium aristatum (Angleton grass, Angleton bluestem) is a perennial tropical forage grass in Poaceae, native from India to Yunnan and Malesia, with 2n = 20, 40, 60, hay yields of 4.5–13.5 t/ha, and cultivars 'Medio', 'Gordo', 'Alabang X', and 'Floren'.
Dicksonia antarctica
Dicksonia antarctica, the soft tree fern or man fern, is an Australian tree fern with a fibrous trunk up to 12 m tall, common in south-eastern Australia.
Dicksonia arborescens
Dicksonia arborescens, the St Helena tree fern, is a tree fern (Dicksoniaceae, Cyatheales) endemic to St Helena, dominating cloud forest at 700–823 m, up to 3 m tall, first described 1788, and the earliest tree fern moved abroad (UK, 1789).
Dicksonia sellowiana
Dicksonia sellowiana, known in Brazil as xaxim, is a tree fern ranging from southern Mexico to Brazil, harvested for its fibrous trunk used as orchid substrate.
Dicksoniaceae
Dicksoniaceae is a family of tree ferns in the order Cyatheales, containing the genera Dicksonia, Calochlaena, and Lophosoria, about 35 species growing in Central and South America, south-east Asia, Australasia, and the Pacific.
Dicotyledon
Dicotyledon (dicot): flowering plant whose embryo has two cotyledons, with net-veined leaves, flower parts in fours or fives, ringed stem vascular bundles, and taproots; historically a class, now known to be paraphyletic, with eudicots forming two-thirds of flowering plants.
Dicotyledon flora of Montana
The dicotyledon flora of Montana, also known as the dicots of Montana, comprises the state's dicot flowering plants, first fully documented by Booth and Wright's 1959 Flora of Montana.
Dicranales
Dicranales, an order of true mosses in subclass Dicranidae, historically included many families now shown polyphyletic; recent phylogenomics restricts it to Dicranaceae, Calymperaceae, Fissidentaceae, and Octoblepharaceae.
Dicranella
Dicranella (forklet-mosses) is a moss genus in Dicranellaceae, type species D. heteromalla; molecular phylogenetics showed it polyphyletic, prompting a narrowed circumscription and new families and genera.
Dicranum
Dicranum (broom or fork mosses) is a genus of about 90-98 acrocarpous mosses in Dicranaceae, with narrow lanceolate leaves, a single costa, and alar cells; 29 species in Europe, some endangered epiphytes.
Dictamnus
Dictamnus, the gas plant or burning bush genus (Fraxinella), is a Rutaceae genus of three accepted species of temperate Eurasian aromatic herbs, chemically distinct in quinoline alkaloids and limonoids, phylogenetically isolated from Ruteae, and long used in traditional medicine.
Dieffenbachia
Dieffenbachia (dumb cane) is a genus of about 57 Araceae herbs native from Mexico to tropical America, grown as variegated houseplants; all parts contain calcium oxalate raphides and proteolytic enzymes causing painful swelling and temporary loss of speech.
Digitalis
Digitalis (foxglove), Plantaginaceae genus and cardiac glycoside drug; source of digoxin and digitoxin, Na+/K+-ATPase inhibitors introduced by Withering's 1785 Account of the Foxglove for dropsy and heart failure.
Digitalis lanata
Digitalis lanata (woolly or Grecian foxglove), Plantaginaceae, a biennial/perennial herb native from SE Europe to NW Türkiye, cultivated for digoxin and lanatosides; introduced and weedy in North America.
Digitalis purpurea
Digitalis purpurea, common foxglove, is a biennial European plant with purple tubular flowers, source of cardiac glycosides like digitoxin, codified by Withering in 1785, and toxic in all parts.
Digitaria
Digitaria (crabgrasses), a cosmopolitan Poaceae genus of about 250-267 species published by Haller in 1768; includes lawn weeds D. sanguinalis and D. ischaemum and the West African cereal fonio, Digitaria exilis.
Digitaria sanguinalis
Digitaria sanguinalis, large or hairy crabgrass, is an annual C4 grass native from the Mediterranean to Central Asia and Malesia, now a major global weed of crops, lawns, and turf with documented herbicide resistance.
Dill
Dill (Anethum graveolens), annual Apiaceae herb grown for feathery leaves and carvone-rich seeds used in pickling, flavoring, essential oil, and Ayurvedic medicine; native from North Africa to Iran.
Dilleniaceae
Dilleniaceae Salisb., sole family of the order Dilleniales, is a pantropical family of 11 genera and roughly 400-600 species of trees, shrubs, and lianas, including Hibbertia, Dillenia, and Tetracera, with numerous stamens and arillate seeds.
Dilleniales
Dilleniales is an accepted order of flowering plants containing the single family Dilleniaceae, with 12 genera and about 430 species, recognized in APG IV (2016) and placed uncertainly within the core eudicot Pentapetalae.
Dimocarpus
Dimocarpus (龙眼属) is a Sapindaceae genus of Asian and Australian trees, source of the longan fruit (dragon-eye); six to nine species, type D. longan, lectotype D. lichi, distinguished by translucent aril and warty fruit.
Dioon
Dioon is a genus of 18 accepted cycad species in Zamiaceae, native from Mexico to Honduras. Originating about 56 Ma in eastern Mexico, it includes the slow-growing, ethnobotanically important chamal (Dioon edule).
Dioon edule
Dioon edule, chestnut dioon or chamal, a slow-growing Mexican cycad (Zamiaceae) from the Sierra Madre Oriental; dioecious, beetle-pollinated, over 2500 years lifespan, IUCN Near Threatened, CITES Appendix II, cold-hardy to about -12 °C.
Dioon holmgrenii
Dioon holmgrenii, Palmera de Sol, an endangered Mexican cycad (Zamiaceae) described in 1981, endemic to Pacific-slope pine-oak forest of Oaxaca at 580–850 m, with six genetically isolated populations.
Dioscorea
Dioscorea (yams), genus of c. 630 species of twining climbers in Dioscoreaceae; source of staple tuber crops (D. rotundata, D. alata, D. polystachya) and diosgenin; cosmopolitan, dioecious, x=10 Old World, x=9 New World.
Dioscorea alata
Dioscorea alata, greater yam, water yam, purple yam, or ube, is a wing-stemmed climbing yam from tropical Asia and Melanesia, cultivated for starchy tubers and domesticated independently in Asia and the Pacific.
Dioscorea rotundata
Dioscorea rotundata, white Guinea yam or white yam, is a West African domesticated yam of hybrid origin (D. praehensilis x D. abyssinica) from the Niger River basin, the main yam of the yam belt, grown for starchy tubers used in pounded yam.
Dioscoreaceae
Dioscoreaceae, the yam family (R.Br., 1810), is a pantropical monocot family in Dioscoreales with about 650 species in four genera, dominated by Dioscorea (over 600 species), the source of edible yams and steroidal saponins.
Dioscoreales
Dioscoreales, an order of monocot flowering plants with the families Dioscoreaceae, Nartheciaceae, and Burmanniaceae; its genus Dioscorea (634 species) contains the yams, a tropical staple crop grown mainly in West Africa.