Thuja sutchuenensis (Sichuan Thuja) is a species of thuja, an evergreen coniferous tree in the cypress family Cupressaceae. It is native to China, where it is a critically endangered local endemic in Chongqing Municipality in eastern Sichuan. The conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. ... Image File history File links Status_iucn3. ... . ... Scientific classification or biological classification is a method by which biologists group and categorize 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 Pteridophyta—ferns and horsetails Seed plants (spermatophytes) †Pteridospermatophyta—seed ferns Pinophyta—conifers Cycadophyta—cycads Ginkgophyta—ginkgo Gnetophyta—gnetae Magnoliophyta—flowering plants... 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 Thuja koraiensis Thuja occidentalis Thuja plicata Thuja standishii Thuja sutchuenensis Thuja (pronounced Thuya) is a genus of coniferous trees in the Cupressaceae (cypress family). ... In biology, binomial nomenclature is the formal method of naming species. ... Adrien René Franchet (1834-1900) was a French botanist, based at the Paris Muséum national dHistoire naturelle. ... Species Thuja koraiensis Thuja occidentalis Thuja plicata Thuja standishii Thuja sutchuenensis Thuja (pronounced Thuya) is a genus of coniferous trees in the Cupressaceae (cypress family). ... 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. ... 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, are one of 13 or 14 division level taxa within the Kingdom Plantae. ... The coniferous Coast Redwood, the tallest tree species on earth. ... 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... In biology and ecology endemic means exclusively native to a place or biota, in contrast to cosmopolitan or introduced. ... Chongqing (Simplified Chinese: ; Traditional Chinese: ; pinyin: ; Postal map spelling: Chungching, also Chungking) is the largest and most populous of the Peoples Republic of Chinas four provincial-level municipalities, and the only one in the less densely populated western half of China. ...   (Chinese: ; pinyin: ; Wade-Giles: SzÅ­4-chuan1; Postal map spelling: Szechwan and Szechuan) is a province in the central-western China with its capital at Chengdu. ...

It is a small or medium-sized tree, reaching possibly 20 m tall, though no trees of this size are currently known. The foliage forms in flat sprays with scale-like leaves 1.5-4 mm long, green above, and with narrow white stomatal bands below. The cones are oval, green ripening brown, 5-8 mm long and 3-4.2 mm broad (opening to 7 mm broad), with 8-10 overlapping scales. “Foliage” redirects here. ... SEM photo of stomata, 350x, colorized In botany, a stoma (also stomate; plural stomata) is a tiny opening or pore, found mostly on the under-surface (epidermis) of a plant leaf, and used for gas exchange. ... Mature female European Black Pine cone Male cones of a pine A cone (in formal botanical usage: strobilus, plural strobili) is an organ on plants in the division Pinophyta (conifers) that contains the reproductive structures. ...

It was first described in 1899 from specimens collected by the French botanist Paul Guillaume Farges in 1892 and 1900, but was not seen again thereafter, despite many searches, for almost 100 years and was presumed to be extinct due to over-cutting for its valuable scented wood. A small number of specimens were however rediscovered in 1999, growing on very inaccessible steep ridges close to (or at the same site) where Farges had first found it. The area of its occurrence has now been designated a Special Protection Area in order to protect the species. In biology and ecology, extinction is the ceasing of existence of a species or group of species. ... Trunks A tree trunk as found at the Veluwe, The Netherlands Wood is a solid material derived from woody plants, notably trees but also shrubs. ...

References and external links

• Xiang Qiaoping et al (2003). Thuja sutchuenensis. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 11 May 2006. Database entry includes justification for why this species is critically endangered
• Gymnosperm Database: Thuja sutchuenensis