Larrea is a genus of five species of New Worldevergreenshrubs that includes the Creosote bushLarrea tridentata of North America and the Jarillas of South America. Creosote bush in foreground, overlooking basalt cliffs in background File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Divisions Green algae Land plants (embryophytes) Non-vascular embryophytes Hepatophyta - liverworts Anthocerophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Seedless vascular plants 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... 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 Zygophyllaceae Krameriaceae The Zygophyllales are an order of dicotyledon plants, comprising the following two families: Family Zygophyllaceae Family Krameriaceae Under the older Cronquist system, the Zygophyllaceae were included within the Sapindales, and the Krameriaceae within the Polygalales. ... Family: Zygophyllaceae Genera: Augea Bulnesia Fagonia Guaiacum Halimiphyllum Izozogia Kallstroemia Kelleronia Larrea Metharme Miltianthus Morkillia Neoluederitzia Peganum Pintoa Plectrocarpa Porlieria Roepera Sarcozygium Seetzenia Sericodes Sisyndite Tetradiclis Tetraena Tribulopis Tribulus Viscainoa Zygophyllum The Zygophyllaceae are a family of about 250 species of dicotyledonous plants also known as the bean-caper family... Creosote bush in foreground, Kilbourne hole NM in background, and more creosote bushes stretching to the horizon The Creosote bush (Larrea tridentata, formerly Larrea divaricata) is an evergreen shrub of the Zygophyllaceae family. ... See genus (mathematics) for the use of the term in mathematics. ... The New World is one of the names used for the continents of North and South America and adjacent islands collectively, in use since the 16th century. ... A Silver Fir shoot showing three successive years of retained leaves In botany, an evergreen plant is a plant which retains its leaves year-round, with each leaf persisting for more than 12 months. ... A willow shrub A shrub or bush is a horticultural rather than strictly botanical category of woody plant, distinguished from a tree by its multiple stems and lower height, usually less than 6 m tall. ... Creosote bush in foreground, Kilbourne hole NM in background, and more creosote bushes stretching to the horizon The Creosote bush (Larrea tridentata, formerly Larrea divaricata) is an evergreen shrub of the Zygophyllaceae family. ... World map showing location of North America A satellite composite image of North America North America is the third largest continent in area and fourth in population after Asia and Africa in area and population and Europe in population. ... South America South America is a continent crossed by the equator, with most of its area in the Southern Hemisphere. ...
The South American species are closely related, and hybrids are partially fertile. In biology, hybrid has three meanings. ...
References
T. J. Mabry, J. H. Hunziker, and D. R. Di Feo, D. R. (Eds.). Creosote Bush: Biology and Chemistry of Larrea in New World Deserts US/IBP Synthesis Series N° 6 (Dowden, Hutchinson and Ross, Inc. PA, 1977)
Juan H. Hunziker and Cecilia Comas, "Larrea interspecific hybrids revisited (Zygophyllaceae)" Darwiniana, 40(1-4): pp. 33-38 (2002)
The furrows are broad and distinct, and the pore area of the furrow is thin and protruding.
Larrea pollen is present in small numbers in packrat middens and lake sediments during the late Quaterary of the American Southwest.
Larrea pollen is present after 11,500 yr in the packrat middens of the Waterman Mountains (Anderson and Van Devender, 1991) and is abundant in the oldest (20,000 yr) packrat midden of the Tinajas Altas series (Davis, 1990).
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