iLeyland Cypress
Leyland Cypress foliage and cone
Scientific classification
Kingdom: Plantae Division: Pinophyta Class: Pinopsida Order: Pinales Family: Cupressaceae Genus: Cupressus
Species
Cupressus × leylandii also: Cupressus × notabilis Cupressus × ovensii Download high resolution version (608x1065, 129 KB)Leyland Cypress foliage and cone - photo User:MPF 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 Chlorophyta Charophyta Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) †Rhyniophyta - rhyniophytes †Zosterophyllophyta - zosterophylls Lycopodiophyta - clubmosses †Trimerophytophyta - trimerophytes Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta... Orders & Families Cordaitales † Pinales   Pinaceae - Pine family   Araucariaceae - Araucaria family   Podocarpaceae - Yellow-wood family   Sciadopityaceae - Umbrella-pine family   Cupressaceae - Cypress family   Cephalotaxaceae - Plum-yew family   Taxaceae - Yew family Vojnovskyales † Voltziales † The conifers, division Pinophyta, also known as division Coniferae, are one of 13 or 14 division level taxa within the... Orders & Families Cordaitales † Pinales   Pinaceae - Pine family   Araucariaceae - Araucaria family   Podocarpaceae - Yellow-wood family   Sciadopityaceae - Umbrella-pine family   Cupressaceae - Cypress family   Cephalotaxaceae - Plum-yew family   Taxaceae - Yew family Vojnovskyales † Voltziales † The conifers, division Pinophyta, also known as division Coniferae, are one of 13 or 14 division level taxa within the... Families Pinaceae, pine family Araucariaceae, araucaria family Podocarpaceae, yellow-wood family Phyllocladaceae Sciadopityaceae, umbrella-pine family Cupressaceae, cypress family Cephalotaxaceae, plum-yew family Taxaceae, yew family The Order Pinales in the Division Pinophyta, Class Pinopsida comprises all the extant conifers. ... Genera Actinostrobus Athrotaxis Austrocedrus Callitris - Cypress-pine Callitropsis - Cypress * (Cupressus) Calocedrus - Incense-cedar Chamaecyparis - Cypress Cryptomeria - Sugi Cunninghamia - Cunninghamia Cupressus - Cypress Diselma - Diselma Fitzroya - Alerce Fokienia - Fujian Cypress Glyptostrobus - Chinese Swamp Cypress Juniperus - Juniper Libocedrus Metasequoia - Dawn Redwood Microbiota - Microbiota Neocallitropsis Papuacedrus * (Libocedrus) Pilgerodendron * (Libocedrus) Platycladus - Chinese Arborvitae Sequoia - Coast... Species See text. ...

The Leyland Cypress, Cupressus × leylandii, is often referred to as just Leylandii. It is a fast-growing evergreen tree much used in horticulture, primarily for hedges and screens. The coniferous Coast Redwood, the tallest tree species on earth. ... The Latin words hortus (garden plant) and cultura (culture) together form horticulture, classically defined as the culture or growing of garden plants. ...

The Leyland Cypress is a hybrid between the Monterey Cypress, Cupressus macrocarpa, and the Nootka Cypress, Cupressus nootkatensis, family Cupressaceae. The hybrid has arisen on nearly 20 separate occasions, always by open pollination, showing the two species are readily compatible and closely related. Two other similar hybrids have also been raised, both involving Nootka Cypress with other Cupressus species:
// In biology, hybrid has two meanings. ... Binomial name Cupressus macrocarpa Hartw. ... Binomial name Callitropsis nootkatensis (D. Don) Örsted Nootka Cypress (Callitropsis nootkatensis), formerly Cupressus nootkatensis, Xanthocyparis nootkatensis or Chamaecyparis nootkatensis, is a cypress (Cupressaceae) with a chequered taxonomic and nomenclatural history. ... Genera Actinostrobus Athrotaxis Austrocedrus Callitris - Cypress-pine Callitropsis - Cypress * (Cupressus) Calocedrus - Incense-cedar Chamaecyparis - Cypress Cryptomeria - Sugi Cunninghamia - Cunninghamia Cupressus - Cypress Diselma - Diselma Fitzroya - Alerce Fokienia - Fujian Cypress Glyptostrobus - Chinese Swamp Cypress Juniperus - Juniper Libocedrus Metasequoia - Dawn Redwood Microbiota - Microbiota Neocallitropsis Papuacedrus * (Libocedrus) Pilgerodendron * (Libocedrus) Platycladus - Chinese Arborvitae Sequoia - Coast...

Cupressus arizonica var. glabra × Cupressus nootkatensis (Cupressus × notabilis)

Cupressus lusitanica × Cupressus nootkatensis (Cupressus × ovensii)

The taxonomic status of Nootka Cypress is disputed; in the past, it was widely regarded as belonging in the genus Chamaecyparis, and in 2002 it was classified in a new genus Xanthocyparis. The most recent treatments (2004), however, transfer it to Callitropsis. In any of these treatments, the hybrids becomes very unusual in being intergeneric hybrids, the only ones ever reported among the Gymnosperms. In fact the very existence of these hybrids, and their ease of formation, is a further strong pointer (in addition to genetic and morphological evidence) for the treatment of Nootka cypress in Cupressus. It may be added that attempts to cross Nootka cypress with other Chamaecyparis species have been universally unsuccessful. Species Chamaecyparis formosensis Chamaecyparis lawsoniana Chamaecyparis obtusa Chamaecyparis pisifera Chamaecyparis taiwanensis Chamaecyparis thyoides The genus Chamaecyparis is one of several genera within the family Cupressaceae that have the common name cypress; for the others, see cypress (disambiguation). ... For album titles with the same name, see 2002 (album). ... 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... Species - Nootka Cypress - Vietnamese Golden Cypress Callitropsis, also known as Xanthocyparis, is a genus of cypress tree in the family Cupressaceae. ... Coast Douglas-fir cone This article lacks an appropriate Taxobox You can help Wikipedia by adding one. ... Species See text. ...

Where Nootka Cypress is treated in Chamaecyparis, the name of the hybrid becomes × Cupressocyparis leylandii, and where treated in Xanthocyparis, it becomes × Cuprocyparis leylandii.

Leyland Cypresses are commonly planted in gardens to provide a quick boundary or shelter hedge. However, their rapid growth (up to a meter per year), heavy shade and great potential height (often over 20 m tall in garden conditions, and they can reach at least 35 m) make them problematic. In Britain it has been the source of a number of high profile disputes between neighbours, even leading to violence (and in one recent case, murder), because of its capacity to cut out light. Part VI of the Anti-Social Behaviour Act 2003 introduced a way for people affected by high hedges (usually, but not necessarily, of leylandii) to ask their local authority to investigate complaints about the hedges, and gave the authorities power to have the hedges reduced in height^[1]. The Anti-Social Behaviour Act is a law in the United Kingdom. ...

It is poorly adapted to areas with hot summers, such as the southern half of the U.S.A., and in these areas becomes very prone to the disease cypress canker caused by the fungus Seridium cardinale. This causes extensive dieback and ultimately death of the tree. In California's Central Valley, they rarely live more than ten years before succumbing, and not much longer in southern states like Alabama. In these areas, the canker-resistant Arizona Cypress is much more successful. For other uses, see United States (disambiguation) and US (disambiguation). ... A disease or medical condition is an abnormality of the body or mind that causes discomfort, dysfunction, distress, or death to the person afflicted or those in contact with the person. ... Note:This article is about Canker in plants. ... Divisions Chytridiomycota Zygomycota Glomeromycota Ascomycota Basidiomycota Deuteromycota The fungi (singular fungus) are a kingdom of eukaryotic organisms. ... This article is about the U.S. state. ... The California Central Valley The California Central Valley dominates the central portion of the state of California. ... Official language(s) English Capital Montgomery Largest city Birmingham Area  Ranked 30th  - Total 52,419 sq mi (135,765 km²)  - Width 190 miles (306 km)  - Length 330 miles (531 km)  - % water 3. ... Binomial name Cupressus arizonica Greene The Arizona Cypress Cupressus arizonica is a species of cypress native to the southwest of North America, in the United States in Arizona, southwest New Mexico, and southern California, and in Mexico in Coahuila, Chihuahua, Durango, Tamaulipas, Zacatecas and northern Baja California. ...

In Northern areas where heavy snows occur, this plant is also susceptible to broken branches and even uprooting in wet, heavy snow.

Note: Caution should be exercised when handling tree clippings - after trimming, for example. The sap can cause skin irritation in susceptible individuals.

References

1. ^ "Fir Extinguisher" by Jonathan Duffy, BBC News Magazine, 31 May 2005, retrieved 25 September 2006