Nothotsuga is a genus of coniferous trees in the family Pinaceae, in many respects intermediate between the genera Keteleeria and Tsuga. It is distinguished from Tsuga by the larger, erect cones with exserted bracts, and (like Keteleeria) male cones in umbels, and from Keteleeria by the shorter leaves and smaller cones. Nothotsuga contains only one species, N. longibracteata, commonly known as the Bristlecone Hemlock, which is found in southeastern China, in southern Fujian, northern Guangdong, northeast Guangxi, northeast Guizhou and southwest Hunan. The conservation status of a species is an indicator of the likelihood of that species continuing to survive. ... 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... 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. ... 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. ... 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 Subfamily Pinoideae     Pinus - pines (about 115 species) Subfamily Piceoideae     Picea - spruces (about 35 species) Subfamily Laricoideae     Cathaya (one species)     Larix - larches (about 14 species)     Pseudotsuga - douglas-firs (five species) Subfamily Abietoideae     Abies - firs (about 50 species)     Cedrus - cedars (two to four species)     Pseudolarix - golden larch (one species)     Keteleeria (three... In biology, binomial nomenclature is a standard convention used for naming species. ... 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 A tree can be defined as a large, perennial, woody plant. ... Genera Subfamily Pinoideae     Pinus - pines (about 115 species) Subfamily Piceoideae     Picea - spruces (about 35 species) Subfamily Laricoideae     Cathaya (one species)     Larix - larches (about 14 species)     Pseudotsuga - douglas-firs (five species) Subfamily Abietoideae     Abies - firs (about 50 species)     Cedrus - cedars (two to four species)     Pseudolarix - golden larch (one species)     Keteleeria (three... Species Keteleeria davidiana Keteleeria evelyniana Keteleeria fortunei Keteleeria is a genus of three species of coniferous trees in the family Pinaceae, related to the genera Nothotsuga and Pseudolarix. ... Species Eastern Hemlock Carolina Hemlock Taiwan Hemlock Northern Japanese Hemlock Himalayan Hemlock Forrests Hemlock Western Hemlock Mountain Hemlock Southern Japanese Hemlock Tsuga is a genus of conifers in the family Pinaceae. ... A cone (in formal botanical usage: strobilus, plural strobili) is an organ on plants in the division Pinophyta (conifers) that contains the reproductive structures. ... Toothed bracts on Rhinanthus minor In botany, a bract is a modified or specialized leaf, from the axil of which a flower or flower stalk arises; or a bract may be any leaf associated with an inflorescence. ... In botany, a leaf is an above-ground plant organ specialized for photosynthesis. ... Fujian (Chinese: 福建; pinyin: ; Wade-Giles: Fu-chien; Postal System Pinyin: Fukien, Foukien; local transliteration Hokkien from Min Nan Hok-kiàn) is one of the provinces on the southeast coast of China. ... Guangdong (Simplified Chinese: 广东; Traditional Chinese: 廣東; pinyin: Guǎngdōng; Wade-Giles: Kuang-tung; Kwangtung in older transliteration; Cantonese: gwong2 dung1), is a province on the south coast of the Peoples Republic of China. ... Guangxi (Simplified Chinese: 广西; Traditional Chinese: 廣西; pinyin: ; Wade-Giles: Kuang-hsi; Postal System Pinyin: Kwangsi; Zhuang: Gvangjsih Bouxcuengh Swcigi or (old orthography) Gvaŋзsiƅ Bouчcueŋƅ Sɯcigi) is an autonomous region of the Peoples Republic of China. ... Guizhou (Simplified Chinese: 贵州; Traditional Chinese: 貴州; pinyin: Gùizhōu; Wade-Giles: Kuei-chou; also spelled Kweichow) is a province of the Peoples Republic of China located in the southwestern part of the country. ... Hunan (Chinese: 湖南; pinyin: ) is a province of China, located in the middle reaches of the Yangtze River and south of Lake Dongting (hence the name Hunan, meaning south of the lake). Hunan is sometimes called 湘 (pinyin: Xiāng) for short, after the Xiang River which runs through the province. ...

It is an evergreen tree reaching 30 m tall. The leaves are flat, needle-like, 1.2-4 cm long and 1-2 mm broad, very similar to those of Tsuga. The cones are very similar to those of Keteleeria but smaller, 2.5-5 cm long, erect, and mature in about 6-8 months after pollination. 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. ... Pollination is an important step in the reproduction of seed plants: the transfer of pollen grains (male gametes) to the plant carpel, the structure that contains the ovule (female gamete). ...

It is a very rare tree, endangered in the wild due to historical deforestation, though it is now protected. It was discovered in 1932, and at first treated as Tsuga longibracteata, being classified in its own genus in 1989 when new research indicated how distinct it is from other species of Tsuga. The American bison numbered as few as 750 in 1890 due to extreme overhunting. ... Deforestation is the conversion of forested areas to non-forest. ... 1932 is a leap year starting on a Friday. ... See genus (mathematics) for the use of the term in mathematics. ... 1989 is a common year starting on Sunday of the Gregorian calendar. ...

External links

• Arboretum de Villardebelle - photo of cones (http://www.pinetum.org/cones/PIcones.htm)
• Gymnosperm Database (http://www.botanik.uni-bonn.de/conifers/pi/no/longibracteata.htm)
• Flora of China (http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200005390)