2,112 articles
Trapa
Trapa (water caltrop, water chestnut) is a genus of annual floating-leaved aquatic plants in Lythraceae, native to the Old World, with 8 accepted species, starchy edible horned fruits, and invasive populations in North America.
Trema
Trema Lour. is a pantropical genus of pioneer trees and shrubs in Cannabaceae, published in 1790, with about 20 species (including Parasponia), 3-veined serrate leaves, and small hard-endocarp drupes.
Triadica
Triadica Lour. (Euphorbiaceae), a three-species Asian tree genus including Chinese tallow (Triadica sebifera), source of vegetable tallow and stillingia oil and invasive in the southeastern United States.
Tribulus cistoides
Tribulus cistoides, Jamaican feverplant or puncture vine, is a prostrate Zygophyllaceae herb native from Cape Verde and Eritrea to Mozambique and the Pacific, with large yellow flowers and spiny burr fruits, used as medicine and food.
Tribulus terrestris
Tribulus terrestris, or puncture vine, is a spiny-fruited herb used in traditional Chinese and Indian medicine and sold as a supplement, though trials show it does not raise testosterone.
Tridax
Tridax (coat buttons, tridax daisy) is a genus of about 25-30 Asteraceae herbs native from Mexico to tropical America, published by Linnaeus in 1753; its type species Tridax procumbens is a pantropical weed used in traditional medicine.
Tridax procumbens
Tridax procumbens (coat buttons, tridax daisy, ghamra) is a creeping Asteraceae herb native to Mexico and tropical America, now a pantropical invasive weed of roadsides and waste ground, used traditionally as a hair tonic and wound remedy.
Trifoliate orange (枳)
Trifoliate orange (枳, karatachi), Citrus trifoliata, formerly Poncirus trifoliata, is a deciduous thorny Chinese citrus relative, the hardiest citrus, used worldwide as a cold-hardy, disease-tolerant semi-dwarfing rootstock and in citrus hybrid breeding.
Trifolium alexandrinum
Trifolium alexandrinum, known as berseem or Egyptian clover, is an annual forage legume grown as a winter feed crop in the Nile Valley and northern India.
Trifolium hybridum
Trifolium hybridum, alsike clover, is a short-lived perennial forage legume in Fabaceae, native from the Mediterranean to Iran, adapted to wet acidic soils, causing bloat and photosensitization, and not a red-white clover hybrid.
Trifolium incarnatum
Trifolium incarnatum (crimson clover), annual Fabaceae legume native to Europe to NW Iran, grown for forage, winter cover crop, and green manure; fixes 70–150 lb N/acre, red flower heads, IUCN least concern.
Trifolium pratense
Trifolium pratense (red clover, purple clover, rotklee) is a short-lived perennial forage legume in Fabaceae, native to Europe and western Asia, grown for high-protein feed and nitrogen fixation, second only to lucerne among sown forage legumes.
Trifolium repens
Trifolium repens, white or Dutch clover, is a stoloniferous perennial Fabaceae legume of Europe and the Mediterranean, grown worldwide for forage, nitrogen fixation, honey, and pollinator lawns.
Trifolium subterraneum
Trifolium subterraneum, subterranean clover or subclover, an annual Mediterranean pasture legume (Fabaceae) with three subspecies (subterraneum, yanninicum, brachycalycinum) that buries its seed pods underground, enabling self-regeneration in grazed pastures, notably in southern Australia.
Trigonella
Trigonella L. is a genus of Fabaceae herbs in tribe Trifolieae, including fenugreek (T. foenum-graecum), native to the Old World and Australia; molecular work moved medicagoids to Medicago and nested Melilotus within it.
Triplochiton
Triplochiton K.Schum. is a genus of two African timber trees in Malvaceae (Helicteroideae), including T. scleroxylon, the obeche or ayous whitewood, conserved against Triplochiton Alef. 1863.
Tripterygium
Tripterygium, East Asian Celastraceae vines including Thunder God Vine (Tripterygium wilfordii), source of triptolide and celastrol; potent anti-inflammatory, immunosuppressive extracts with narrow therapeutic window and hepatotoxic, reproductive toxicity.
Tripterygium wilfordii
Tripterygium wilfordii, known as thunder god vine or lei gong teng, is a woody vine native to southern China used in traditional Chinese medicine and studied for rheumatoid arthritis.
Trollius
Trollius (globeflowers) is a genus of perennial Ranunculaceae herbs of the Northern Hemisphere, centered in East Asia, with medicinal species such as T. chinensis and three plastome-defined clades led by T. lilacinus.
Tropaeolum
Tropaeolum, the nasturtium genus (nasturtiums, Indian cress), is a Brassicales genus of 93 accepted species in Tropaeolaceae, native from Mexico to southern South America; includes garden nasturtium T. majus and the Andean tuber crop mashua.
Tuber
Tuber: a swollen underground stem storage organ, as in potato, formed from a stolon and bearing buds (eyes); distinct from tuberous roots like sweet potato, and controlled by phloem-mobile StSP6A signaling.
Turnera
Turnera is a genus of about 120 to 145 flowering plants in the family Passifloraceae, native chiefly to tropical America and the source of the herb damiana.
Turnera diffusa
Turnera diffusa (damiana), a Passifloraceae shrub native from southern Texas to Brazil, is a traditional herbal tea plant reputed as an aphrodisiac, with flavonoid-rich leaves, licensed Canadian products, and German FSIAD therapy use.
Tussilago
Tussilago, coltsfoot (Tussilago farfara), a monotypic Asteraceae genus of temperate Eurasia; cough remedy and vegetable containing hepatotoxic pyrrolizidine alkaloids, invasive in North America.
Uapaca
Uapaca (sugar plum genus) is a Phyllanthaceae genus of dioecious African and Madagascan trees; U. kirkiana, the miombo sugar plum, is a prized edible-fruit and timber tree of southern Africa.
Uapaca guineensis
Uapaca guineensis (rikio, sugar plum) is a West and Central African Phyllanthaceae tree of wet tropical forests, used for local construction timber, raw edible fruit, and traditional medicine; IUCN least concern.
Ugni
Ugni (uñi) is a genus of four accepted Myrtaceae shrub species native from Mexico to southern South America; Ugni molinae, the Chilean guava or murtilla, is a cultivated Patagonian berry, distinct from Myrtus and from Amomyrtus luma.
Ulex
Ulex (gorse, furze, whin) is a genus of spiny, yellow-flowered Fabaceae shrubs native to western Europe and the Mediterranean, with about 15-21 species, a diploid-tetraploid-hexaploid series, and the invasive hexaploid Ulex europaeus spread across more than 50 countries.
Ulex europaeus
Ulex europaeus, known as gorse, furze, or whin, is a spiny evergreen shrub of the legume family, native to western Europe and among the world's worst invasive plants.
Ullucus
Ullucus (ulluco, melloco, papalisa; Ullucus tuberosus Caldas), sole species of its Basellaceae genus, is an Andean tuber crop grown at 2,600–3,800 m, notable for betalain pigments absent in other Andean tubers and for Ecuador's second-most-important tuber after potato.