Black Ironwood (Olea laurifolia), found in KwaZulu-Natal Province, South Africa, is a species of flowering plants belonging to the olive family Oleaceae. The Guinness Book of World Records lists this tree as the world's heaviest wood with a specific gravity of 1.49. The timber has a good resistance to abrasion and an all round very good strength. It is an excellent turnery wood and is used for a wide range of decorative items. It also sparks when you cut it with a chainsaw Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Divisions Land plants (embryophytes) Non-vascular plants (bryophytes) Hepaticophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants Adiantum pedatum (a fern... Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also angiosperms or Magnoliophyta) are one of the major groups of modern plants, comprising those that produce seeds in specialized reproductive organs called flowers, where the ovulary or carpel is enclosed. ... Orders see text Dicotyledons or dicots are flowering plants whose seed contains two embryonic leaves or cotyledons. ... Families See text The Order Lamiales is a taxon in the asterid group of dicotyledonous flowering plants. ... Genera Abeliophyllum - Chionanthus - Fringetree Fontanesia - Forestieria - Swamp-privet Forsythia - Forsythia Fraxinus - Ash Jasminum - Jasmine Ligustrum - Privet Notelaea - Nyctanthes - Olea - Olive Osmanthus - Osmanthus Phillyrea - Mock-privet Picconia - Schrebera - Syringa - Lilac Oleaceae, the olive family, is a plant family containing 24 genera of woody plants, including shrubs, trees and vines. ... For the Italian political alliance see Olive Tree, and the color, olive (color). ... In biology, binomial nomenclature is a standard convention used for naming species. ... Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck (August 1, 1744 - December 28, 1829) was a major 19th century French naturalist, who was one of the first to use the term biology in its modern sense. ... Capital Pietermaritzburg Largest city Durban Area  - Total Ranked 7th 92,100 km² Premier Sbu Ndebele (ANC) Population   - 2001   - 1996   - Density Ranked 1st 9,426,019 8,417,021 102/km² (2001) Languages isiZulu (80. ... Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also angiosperms or Magnoliophyta) are one of the major groups of modern plants, comprising those that produce seeds in specialized reproductive organs called flowers, where the ovulary or carpel is enclosed. ... Binomial name Olea europaea L. The Olive (Olea europaea) is a species of small tree in the family Oleaceae, native to coastal areas of the eastern Mediterranean region. ... Genera Abeliophyllum - Chionanthus - Fringetree Fontanesia - Forestieria - Swamp-privet Forsythia - Forsythia Fraxinus - Ash Jasminum - Jasmine Ligustrum - Privet Notelaea - Nyctanthes - Olea - Olive Osmanthus - Osmanthus Phillyrea - Mock-privet Picconia - Schrebera - Syringa - Lilac Oleaceae, the olive family, is a plant family containing 24 genera of woody plants, including shrubs, trees and vines. ... The Guinness Book of Records (or in recent editions Guinness World Records, and in previous US editions Guinness Book of World Records) is a book published annually, containing an internationally recognized collection of superlatives: both in terms of human achievement and the extrema of the natural world. ... Relative density (also known as specific gravity) is a measure of the density of a material. ...