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Heracleum sphondylium
Heracleum sphondylium, common hogweed or cow parsnip, is a native European Apiaceae herb, 0.3-1.5 m tall with blunt leaves and small umbels, only weakly phototoxic, unlike giant hogweed.
Herb
Herb: botanically, a non-woody plant whose stem dies back yearly; in common use, plants used for flavoring, medicine, and perfume. Key facts: fresh-to-dried ratio 3:1, 0 C storage, USD 5.9 billion fresh herb market.
Herbaceous plant
Herbaceous plant: a non-woody vascular plant whose above-ground parts die back seasonally; includes annuals, biennials, and perennials; about half of angiosperm species; lacks secondary growth.
Herbario nacional
Herbario Nacional de Costa Rica (CR), the national herbarium of Costa Rica at the Museo Nacional in San José: founded 1887, about 500,000 specimens, roughly 4,500 types, largest herbarium in Central America.
Herbario paul c . standley
Herbario Paul C. Standley (EAP), herbarium of Zamorano's Escuela Agrícola Panamericana in Honduras, founded 1943, renamed 1964; largest Honduran collection, over 200,000 sheets, most type specimens in Central America.
Herbarium jujuy agronomia
Herbarium JUA (Herbario JUA) is the herbarium of the Facultad de Ciencias Agrarias, Universidad Nacional de Jujuy, Argentina, founded April 1981 by Osvaldo Ahumada and Alicia Rotman, holding over 18,000 specimens and the only herbarium in Jujuy province.
Herbarium messanaensis
Herbarium messanaensis (MS) is the University of Messina herbarium, founded 1900, holding about 15,000 vascular plant and algae specimens, with an 8,481-specimen historic Sicilian section and a 17th-century Castelli-attributed volume.
Herbarium UFRO
Herbarium UFRO (UFROH) is the Index Herbariorum-registered herbarium of the Universidad de La Frontera in Temuco, Chile; registered in 2015 with 50 specimens, it vouchers plant and fungal research in the Araucanía Region.
Herbier (DAKAR)
Herbier DAKAR is the herbarium of UCAD's Department of Plant Biology in Dakar, Senegal, founded 1960 by Professor J. Miege to hold a representative collection of Senegal's flora, alongside the older IFAN herbarium.
Herbier (OUA)
Herbier (OUA) is the herbarium of the University of Ouagadougou, now Joseph Ki-Zerbo University, Burkina Faso; founded from Sita Guinko's 1975 work, about 12,000 specimens, digitized in BRAHMS, base for the national flora catalogue.
Herbier (UQAR)
Herbier Jean-Faubert, the herbarium of Université du Québec à Rimouski (UQAR), founded 1970 from abbé A.A. DeChamplain's donated collection; over 7,000 vascular plant specimens documenting southeastern Quebec and Gaspé flora, named for bryologist Jean Faubert in 2019.
Herniaria
Herniaria (ruptureworts) is a genus of prostrate Caryophyllaceae herbs published by Linnaeus in 1753, type species H. glabra, with about 52 accepted species from Europe to Central Asia and Africa, traditionally used for hernias and kidney stones.
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.
Hesperocyparis
Hesperocyparis (western cypresses) is a Cupressaceae genus published in 2009 for New World species formerly in Cupressus; 17 accepted species, native western North America to Central America, origin ~39.2 Ma.
Heteropogon
Heteropogon (tanglehead) is a genus of about four to six tropical Andropogoneae grasses, type species H. contortus (black speargrass), with twisted hygroscopic awns, pungent calluses, pantropical savanna distribution, and non-monophyletic circumscription.
Heteropogon contortus
Heteropogon contortus (black speargrass, tanglehead, pili grass) is a tufted perennial Poaceae grass of the seasonally dry tropics, a major Queensland pasture grass whose barbed, twisted-awned seeds injure livestock and make it invasive in Florida.
Heterospory
Heterospory is the production of two kinds of spores by the sporophytes of land plants: male microspores and larger female megaspores. It first evolved in the Devonian period.
Heterospory in ferns
Heterospory in ferns: production of microspores and megaspores with separate male and female gametophytes, found only in the water fern order Salviniales (Marsileaceae, Salviniaceae), evolved independently of lycophyte and seed plant heterospory.
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
Hibiscus is a genus of about 200–438 species in Malvaceae, tribe Hibisceae, native to tropics and subtropics, known for showy flowers, ornamental and fiber uses, and roselle (H. sabdariffa) tea; molecular studies show the genus is polyphyletic.
Hibiscus 'Kopper King'
Hibiscus 'Kopper King' (Hibiscus moscheutos 'Kopper King') is a Fleming-brothers hardy hibiscus cultivar, PP 10,793, with copper-red foliage and 10-12 inch white-pink red-eyed flowers, hardy to zone 4.
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.
Hieracium
Hieracium (hawkweeds) is a large Asteraceae genus of perennial herbs with yellow flowerheads, 4,614 accepted species, apomictic polyploids, and a split-off relative genus Pilosella; Mendel's later experimental plant.
High-amylose cornstarch
High-amylose cornstarch (high-amylose maize starch, HAMS, amylomaize starch) is cornstarch with over 50 percent amylose versus 25 to 30 percent normally, from the ae (SBEIIb) mutation; a resistant starch source, GRAS-notified by Yale for oral rehydration solutions at 50 g/L (GRN 000615).
High-fructose corn syrup
High-fructose corn syrup (HFCS), a corn-starch-derived liquid sweetener with 42% or 55% fructose (HFCS-42, HFCS-55), replaced sucrose in most US beverages by the mid-1980s; cheaper than sugar, GRAS status, declining use since 2000.
Hilaria
Hilaria (curly-mesquite, hilaria grass) is a genus of about ten New World grasses in Poaceae, Chloridoideae, subtribe Hilariinae, native from western and central USA to Guatemala, described by Kunth in 1816.
Hippeastrum
Hippeastrum, also called knight's star or horticultural amaryllis, is a genus of about 70-90 bulbous Amaryllidaceae native to Central and South America, sold as Hippeastrum x hybridum, with hollow scapes and papery black seeds.
Hippocrepis
Hippocrepis (horseshoe vetches) is a genus of 34 Fabaceae species in tribe Loteae, native Europe to Pakistan and Macaronesia to Arabia, with curved lomentaceous pods; type-era name from Linnaeus 1753.
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.