2,112 articles
Forestiera
Forestiera, known as swampprivet, is a genus of dioecious shrubs and small trees in the olive family, native from the southern United States to Ecuador.
Forsythia
Forsythia (golden bells, lian qiao shu) is a genus of about 11 East Asian deciduous shrubs in Oleaceae with yellow early-spring flowers on bare branches; most garden clones derive from the hybrid F. × intermedia, and flowers are heterostylous.
Forsythia suspensa
Forsythia suspensa (连翘), weeping forsythia, Oleaceae shrub native to China; golden spring flowers on pendulous hollow-pith branches; source of TCM drug Forsythiae Fructus (lianqiao); parent of Forsythia × intermedia.
Fouquieria fasciculata
Fouquieria fasciculata (ocotillo, árbol del barril, tzitcó) is a Vulnerable, CITES Appendix I caudex shrub of southern Hidalgo, Mexico, in subg. Bronnia with F. purpusii, bearing white ten-stamened winter flowers.
Four-leaf clover
Four-leaf clover: a rare four-leaflet variant of normally trifoliate clover, mostly white clover (Trifolium repens); recessive trait plus environment, found about 1 in 5,000, a luck symbol.
Fragaria vesca
Fragaria vesca, woodland or wild strawberry, alpine strawberry, is a diploid Rosaceae perennial herb with 240 Mb genome, reference genome for Fragaria, and diploid progenitor of cultivated Fragaria × ananassa.
Frangula alnus
Frangula alnus (alder buckthorn, glossy buckthorn; syn. Rhamnus frangula), a Rhamnaceae shrub native from Europe to Central Siberia and NW Africa, used for laxative bark and gunpowder charcoal, and a highly invasive North American weed.
Frankincense
Frankincense, also called olibanum, is the aromatic gum resin tapped from Boswellia trees in Arabia, Africa, and India, burned as incense since antiquity and traded across the ancient Mediterranean world.
Fraxinus
Fraxinus (ash), genus of about 43 Oleaceae tree species of the Northern Hemisphere with pinnate leaves and winged samara fruits; threatened by ash dieback and emerald ash borer, valued for elastic timber.
Fraxinus americana
Fraxinus americana, white ash or American white ash, is an eastern North American hardwood tree prized for shock-resistant timber used in baseball bats and tool handles; now critically endangered from emerald ash borer.
Fraxinus excelsior
Fraxinus excelsior, common or European ash, a large European deciduous timber tree in Oleaceae, native Europe to Iran, IUCN Near Threatened due to ash dieback (Hymenoscyphus fraxineus) and threatened by emerald ash borer.
Fraxinus ornus
Fraxinus ornus (manna ash, flowering ash) is a Mediterranean deciduous ash tree grown in Sicily and Calabria for manna, a mannitol-rich sweet bark exudate used as a mild laxative; IUCN Least Concern.
Fraxinus pennsylvanica
Fraxinus pennsylvanica, green ash (also red ash), a dioecious North American ash tree of floodplains and urban plantings, 50-70 ft tall, now Critically Endangered from emerald ash borer.
Fred the Tree
Fred the Tree is an Australian pine (Casuarina) growing out of the roadbed of the abandoned Old Seven Mile Bridge in the Florida Keys, a celebrated local landmark.
Fridericia
Fridericia Mart. (Bignoniaceae, tribe Bignonieae) is a genus of about 62 neotropical liana species from Mexico to tropical America, formerly including most of Arrabidaea; best known for the medicinal, dye plant Fridericia chica.
Fruit tree
Fruit tree: woody perennial grown for edible fruit (apple, olive, citrus, mango, banana). Domesticated after grain agriculture in the fourth millennium BC; propagated by grafting scion onto rootstock; key crops in orchards and agroforestry.
Fuchsia
Fuchsia, genus of about 108 flowering plant species in Onagraceae, native from Mexico to tropical South America, New Zealand, and Tahiti; named by Plumier after Leonhart Fuchs; known for pendulous two-tone flowers, edible berries, and thousands of garden hybrids.
Fumaria
Fumaria (fumitories, Erdrauch) is a genus of about 46-54 annual Papaveraceae herbs from Europe to India, with spurred irregular flowers, one-seeded nutlets, isoquinoline alkaloids such as protopine, and traditional medicinal use in Ayurveda, Unani, and European herbal medicine.
Fumaria officinalis
Fumaria officinalis (common fumitory, earth smoke) is an annual Papaveraceae herb native to Europe to the Caucasus, used medicinally; protopine is its main alkaloid and it has an EU herbal monograph.
Gaillardia
Gaillardia (blanket flower, firewheel) is an Asteraceae genus of about 20-30 species native to North and southern South America, described in 1786, with red-and-yellow heads, the garden hybrid G. x grandiflora, and invasive G. aristata in Hungary.
Galeopsis
Galeopsis L. (hemp-nettle) is a genus of about 10 annual herbs in the mint family (Lamiaceae), native to temperate Eurasia, placed in tribe Galeopsideae, with frequent hybridization and traditional medicinal uses.
Galinsoga
Galinsoga (gallant soldiers) is a genus of 12 accepted annual Asteraceae herbs native to tropical and subtropical America, established by Ruiz and Pavon in 1794; its weedy species G. parviflora and G. quadriradiata are invasive worldwide and used as food and medicine.
Galinsoga parviflora
Galinsoga parviflora, gallant soldier or quickweed (guascas), an annual Asteraceae herb native to tropical America, a cosmopolitan weed of crops, distinguished from G. quadriradiata by sparse hairs and blunt pappus tips, and eaten as a cooked vegetable.
Galium
Galium (bedstraws, cleavers) is a cosmopolitan genus of about 500-670 species of Rubiaceae herbs with whorled leaves, four-angled stems, small four-merous flowers, and two-lobed fruits; type species G. aparine.
Galium aparine
Galium aparine, cleavers or catchweed bedstraw (stickywilly), is a hooked-hair annual climbing herb of Rubiaceae, a widespread temperate weed of crops and gardens with bur-like fruits, edible and folk-medicinal uses, and invasive status in Argentina.
Galium mollugo
Galium mollugo (smooth bedstraw, hedge bedstraw, false baby's breath), a perennial Rubiaceae herb native to Europe to Siberia and North Africa, invasive in North American hayfields and pastures, regulated as a Canadian Secondary Noxious weed seed.
Galium odoratum
Galium odoratum (sweet woodruff, Waldmeister), a Rubiaceae perennial of temperate Eurasia, is a shade ground cover with whorled leaves and coumarin-scented dried foliage used to flavor German May wine.
Galium verum
Galium verum (lady's bedstraw), perennial Rubiaceae herb of temperate Eurasia and NW Africa; type species of Galium, golden-yellow flowers, whorled leaves, traditional dye, milk-coagulation, and diuretic uses.
Gall
Gall: an abnormal plant growth induced by another organism, most often insects or mites via feeding or egg-laying chemicals; also bacteria, fungi, nematodes, viruses. Provides shelter and nutrition to the inducer; usually harmless to plant health.
Gametophyte
Gametophyte: the haploid, gamete-producing multicellular generation of plants, alternating with the diploid sporophyte. Dominant in bryophytes, independent in ferns and lycophytes, reduced to a few cells in seed plants such as pollen.