4,295 articles
Eichhornia crassipes
Eichhornia crassipes, water hyacinth, now Pontederia crassipes, is a South American floating aquatic plant, one of the world's worst invasive weeds, controlled by Neochetina weevils and used for bioenergy and bioremediation.
El Palo Alto
El Palo Alto is a famous ~1,000-year-old coast redwood (Sequoia sempervirens) on San Francisquito Creek, California Historical Landmark #2, namesake of Palo Alto; 110 ft tall, down from 162 ft, saved by wells capped and misting.
Elaeagnaceae
Elaeagnaceae, the oleaster family (oleaster, sea buckthorn), is a Rosales family of three genera, Elaeagnus, Hippophae, Shepherdia, and ca. 100 Northern Hemisphere species with silvery scales, petal-less flowers, and Frankia nitrogen-fixing root nodules.
Elaeagnus
Elaeagnus (oleaster genus), family Elaeagnaceae, 93 accepted shrub/tree species with silvery scaled leaves, nitrogen-fixing Frankia nodules; includes invasive autumn olive and Russian olive and ornamental hybrids.
Elaeagnus angustifolia
Elaeagnus angustifolia, Russian olive or oleaster, a thorny deciduous Elaeagnaceae tree native from eastern Europe to temperate Asia; nitrogen-fixing, salt-tolerant, invasive in western North American riparian areas, and a traditional medicinal and food plant.
Elaeis
Elaeis, the oil palm genus (Arecaceae), includes African oil palm Elaeis guineensis and American E. oleifera; native to tropical Africa and tropical America, it supplies about 40% of world vegetable oil.
Elaeis guineensis
Elaeis guineensis, the African oil palm, is a tropical Arecaceae palm native to West and Central Africa, source of palm and palm-kernel oil; highest-yielding oil crop, grown on about 21 million hectares, mostly Indonesia and Malaysia.
Elaeocarpaceae
Elaeocarpaceae Juss. (1816), a mainly tropical family of 12 genera and c. 600 species in Oxalidales; largest genera Elaeocarpaceae Elaeocarpus (c. 350) and Sloanea (c. 150); includes former Tremandraceae; absent from continental Africa.
Elaeocarpus
Elaeocarpus (rudraksha, quandong) is the largest genus of Elaeocarpaceae, about 350-483 species of Old World tropical trees with fringed petals, blue sculpted drupes, and beads, timber, and medicinal uses.
Elaphoglossum
Elaphoglossum (tongue ferns), a Dryopteridaceae fern genus of 600 to 1,100 species with simple fronds and acrostichoid sori, mostly American tropical epiphytes, five molecular clades, Miocene amber fossil.
Elegia
Elegia is a genus of about 50 evergreen, reed-like flowering plants in the family Restionaceae, endemic to South Africa's Cape Provinces and a main component of fynbos vegetation.
Eleocharis dulcis
Eleocharis dulcis, known as Chinese water chestnut or Biqi, is a perennial sedge cultivated in China for centuries for its sweet, starchy corms, eaten fresh, canned, or as starch.
Elettaria
Elettaria, true cardamom genus (Elettaria cardamomum, green or true cardamom), a small Zingiberaceae genus native to India, Sri Lanka, Malaysia, and Indonesia; only E. cardamomum is true cardamom, other cardamom-named species are false cardamoms.
Eleusine
Eleusine is a genus of about ten grass species in the family Poaceae, first published in 1788, that includes finger millet and the weed goosegrass.
Eleusine indica
Eleusine indica (goosegrass, wiregrass) is a diploid C4 annual grass of Poaceae, a pantropical weed of crops and a close wild relative of finger millet, notorious for evolving resistance to many herbicide modes of action.
Eleutherococcus
Eleutherococcus (Siberian ginseng, eleuthero, Acanthopanax) is an Araliaceae genus of about 29 thorny Asian shrub species; E. senticosus root is an EU traditional herbal medicine for asthenia and a Soviet-era adaptogen.
Eleutherococcus senticosus
Eleutherococcus senticosus, also known as Siberian ginseng or eleuthero, is a spiny shrub of the ginseng family native to the Russian Far East, China, Korea, and Japan.
Elm
Ulmus (elms), genus of trees in Ulmaceae, Rosales, native to temperate Eurasia, North Africa, and the Americas; 37 accepted species; devastated by Dutch elm disease (Ophiostoma) spread by bark beetles.
Elymus
Elymus (wild rye, wheatgrasses), Linnaeus 1753, is the largest allopolyploid grass genus of tribe Triticeae, Poaceae, with about 150-200 species combining St, H, P, W, and Y genomes, native across the Northern Hemisphere and used for forage, restoration, and breeding germplasm.
Embryophyte
Embryophytes (Embryophyta), or land plants, are green plants retaining a multicellular embryo, with alternation of generations between gametophyte and sporophyte; they arose from streptophyte algae around 480-500 Ma and include mosses through flowering plants.
Emile S. Gardiner
Emile S. Gardiner is an American research forester with the U.S. Forest Service Southern Research Station in Stoneville, Mississippi, known for work on oak regeneration and restoring bottomland hardwood forests on former farmland.
Emmer
Emmer (Triticum turgidum subsp. dicoccum), also called farro, is a hulled tetraploid wheat domesticated in the Fertile Crescent by roughly 10,000 years ago; it is the ancestor of durum wheat and a progenitor of bread wheat.
Empetrum
Empetrum (crowberry), Ericaceae genus of evergreen dwarf shrubs with four accepted species, bipolar across the subarctic Northern Hemisphere and southern South America; black seedy berries eaten by people and wildlife.
Empetrum nigrum
Empetrum nigrum (black crowberry, crowberry) is an evergreen Ericaceae dwarf shrub of boreal and arctic Northern Hemisphere heaths, with black stone fruits, diploid dioecious and tetraploid hermaphroditum groups, and bibenzyl-based allelopathy.
Encephalartos
Encephalartos (bread trees), African-endemic cycad genus in Zamiaceae with 68 taxa, 85% threatened, dioecious cone-bearing plants pollinated by specialized insects; all species CITES Appendix I.
Encephalartos ferox
Encephalartos ferox, the holly-leafed cycad (Zamiaceae), native Mozambique to KwaZulu-Natal; glossy spiny holly-like leaflets, bright red cones, dioecious, IUCN Near Threatened, CITES Appendix I, about 100,000 mature individuals.
Encephalartos horridus
Encephalartos horridus, the Eastern Cape blue cycad, is an Endangered South African cycad with intense blue foliage, a ~431 km2 range, under 5,000 mature plants, heavy poaching, and CITES Appendix I listing.
Encephalartos woodii
Encephalartos woodii, Wood's cycad, a South African cycad from Ngoye Forest, KwaZulu-Natal, extinct in the wild since 1916. Only one male plant was ever found in 1895; all cultivated specimens are male clones, and no female exists.
Encyclia
Encyclia, known as the butterfly orchid, is a genus of about 174 epiphytic orchids in subtribe Laeliinae, native from Florida and Mexico south to Brazil and Argentina.
Endosperm
Endosperm: the triploid (2m:1p) nutritive seed tissue of flowering plants, formed by double fertilization of the central cell; site of genomic imprinting, source of cereal grain food, and sensitive to parental genome dosage.