881 articles
Gossypium
Gossypium (cotton genus), Malvaceae tribe Gossypieae; 20–50 tropical species, four independently domesticated; G. hirsutum and G. barbadense supply ~98% of world cotton fiber.
Gossypium arboreum
Gossypium arboreum (tree cotton, Desi cotton), A2-genome diploid cotton native to India and Sri Lanka, domesticated in the Indus Valley before 6000 BC; genome 1,746 Mb, short 1.3–1.5 cm fibers, independently domesticated from G. herbaceum.
Gossypium hirsutum
Gossypium hirsutum, upland cotton, is the tetraploid species behind over 90% of world cotton, domesticated about 5,500 years ago on Mexico's Yucatán Peninsula from wild perennial ancestors.
Grape
Grape, fruit of Vitis vinifera (grapevine), a climbing vine eaten fresh, dried as raisins, or made into wine and juice; 77.7 million t of fresh grapes in 2024, led by China, Italy, and the USA, with Near East domestication origin.
Grape syrup
Grape syrup, also called pekmez, petimezi, dibs, saba, or arrope, is a molasses-like sweetener made by boiling down unfermented grape juice, typically 65–80% soluble solids, with Roman roots (defrutum, sapa) and codex limits on its fructose/glucose ratio.
Guarea
Guarea (F.Allam. ex L., nom. cons., 1771) is a Neotropical genus of Meliaceae trees, second largest American mahogany genus after Trichilia, with about 70 species from Mexico to Argentina, terminal-bud leaves, bird-dispersed sarcotestate seeds, and limonoid-rich chemistry.
Guava
Guava (Amrood, Peyara) is a tropical fruit tree of the myrtle family, an evergreen shrub or small tree grown throughout the tropics for its sweet aromatic fruit.
Guazuma
Guazuma is a genus of four Malvaceae tree species native to Mexico and tropical America; its best-known species, G. ulmifolia (mutamba, West Indian elm), provides timber, livestock forage, and medicinal proanthocyanidins.
Guazuma ulmifolia
Guazuma ulmifolia (West Indian elm, bastard cedar, mutamba, guácimo) is a neotropical Malvaceae tree from Mexico to tropical America, a Least Concern multipurpose timber, fodder, fuel, and medicinal species with tannin-rich bark.
Gynostemma pentaphyllum
Gynostemma pentaphyllum (jiaogulan, Amachazuru), a Cucurbitaceae climbing herb native to Asia, consumed as tea; contains gypenoside saponins related to ginsenosides, studied for glucose and lipid effects.
Hagenia abyssinica
Hagenia abyssinica (kosso, African redwood), sole species of the monotypic Rosaceae genus Hagenia, is a dioecious Afromontane tree from Eritrea to Zambia whose dried female flowers are a traditional Ethiopian tapeworm remedy; IUCN Least Concern but endangered in Ethiopia.
Halophyte
Halophyte: salt-tolerant plant surviving at about 200 mM NaCl or more; also called salt-loving plants, contrasted with glycophytes. About 1% of flora; tolerate salt via vacuolar ion compartmentalization, compatible solutes, and salt glands.
Haloxylon
Haloxylon (saxaul) is a genus of about 12 Amaranthaceae shrubs and small trees of saline and arid deserts from Spain and North Africa to Central Asia and Mongolia, used for sand fixation, fodder, fuel, and medicine.
Hamamelidaceae
Hamamelidaceae, the witch-hazel family, is a Saxifragales family of trees and shrubs with 27 accepted genera and roughly 100-120 species, woody capsules with ballistic seed dispersal, and an East Asian diversity center; Hamamelis yields witch hazel astringent.
Hamamelis
Hamamelis is a genus of five deciduous shrub species, the witch-hazels, native to eastern North America and East Asia. H. virginiana is the source of medicinal witch hazel.
Hardwood
Hardwood: wood of angiosperm (broadleaf, flowering) trees, as opposed to softwood from conifers. Defined by vessel elements (pores), not hardness; balsa is a hardwood. Used for flooring, furniture; stores carbon.
Hawaiian hibiscus
Hawaiian hibiscus (aloalo) are the roughly six native Hibiscus species of Hawaii, including fragrant white kokiʻo keʻokeʻo (Hibiscus arnottianus, H. waimeae) and the endangered yellow state flower maʻo hau hele (Hibiscus brackenridgei).
Hazel
Corylus avellana, common hazel or European hazelnut, a Betulaceae shrub native to Europe and western Asia; wind-pollinated, self-sterile, source of the hazelnut crop dominated by Türkiye, distinct from Corylus maxima and americana.
Hazelnut
Hazelnut (fandoq), the nut of Corylus avellana: winter-flowering, wind-pollinated, self-incompatible; Turkey grows over 65% of the ~1.08 million-ton world crop, Italy second, Oregon 99% of US output; eastern filbert blight drives breeding.
Hedera
Hedera (ivy), including English ivy Hedera helix, is a genus of evergreen root-climbing woody vines in Araliaceae, native from Europe to Iran, flowering September to November, valued for wildlife and ornament but invasive in parts of North America, Australia, and New Zealand.
Hedysarum
Hedysarum (sulla, sweetvetch) is a genus of about 227 legume species in Fabaceae, tribe Hedysareae, with lomented pods, native to temperate Eurasia, North Africa, and western North America, divided into sections Hedysarum, Multicaulia, and Stracheya.
Helianthemum
Helianthemum (rock rose, sun rose) is the largest genus of Cistaceae, about 140 Palearctic taxa centered on the Mediterranean, with three radiating sections since the Late Miocene and hard-coated seeds needing scarification.
Hemicellulose
Hemicellulose is a group of branched, non-cellulosic polysaccharides in plant cell walls that bind to cellulose and reinforce it, making up 20 to 35% of the wall and including xylans and xyloglucans.
Hemp oil
Hemp oil (hemp seed oil) is the culinary oil pressed from Cannabis sativa seeds, naturally free of THC and CBD, GRAS-recognized by FDA in 2018, and distinct from hemp-derived CBD oil extracted from flowers and leaves.
Heracleum (plant)
Heracleum, commonly known as hogweed or cow parsnip, is a genus of about 90 herbs in the carrot family native to the temperate Northern Hemisphere, some reaching 18 ft.
Hesperis matronalis
Hesperis matronalis, dame's rocket or dame's violet, is a Eurasian biennial mustard with fragrant four-petaled purple or white flowers, widely naturalized and invasive in North America, attacked by the weevil Ceutorhynchus inaffectatus, and often confused with five-petaled garden phlox.
Hevea
Hevea is a genus of ten Euphorbiaceae tree species native to South Tropical America; Hevea brasiliensis, the rubber tree, supplies all commercial natural rubber, used mainly in tires, with guayule and dandelion as alternatives.
Hibiscus syriacus
Hibiscus syriacus, rose of Sharon or shrub althea, is a deciduous Malvaceae shrub native to southern China and Taiwan, the national flower of South Korea, hardy to USDA zone 5, with white-to-purple summer flowers and many cultivars.
Hickory
Hickory (Carya, Juglandaceae): about 16 hardwood species native to Asia, Central America, and North America, prized for shock-resistant tool-handle wood and oil-rich nuts; European species went extinct in the Ice Age.
Hippophae
Hippophae (sea buckthorn, 沙棘属), spiny dioecious Elaeagnaceae shrubs with seven species from Europe to the Himalaya; H. rhamnoides fixes nitrogen via Frankia and yields vitamin-rich, omega-7 oil berries bred into over 150 cultivars.