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Ceratozamia whitelockiana : ウィキペディア英語版 | Ceratozamia whitelockiana
''Ceratozamia whitelockiana'' is a species of plant in the family Zamiaceae. It is endemic to Mexico, where it is known only from the state of Oaxaca. Only two subpopulations have been found, with a total population of about 2200 individuals. The habitat is threatened by conversion to plantations using slash-and-burn techniques.〔Vovides, A. & Chemnick, J. 2010. (''Ceratozamia whitelockiana''. ) The IUCN Red List of Threatened Species. Version 2015.2. Downloaded on 05 September 2015.〕 This cycad has a cylindrical trunk about 20 to 30 centimeters long. The leaves are up to 2.5 meters in length and have 30 to 40 pairs of leaflets. The plant was named for cycad expert Loran Whitelock.〔Chemnick, J., & Gregory, T. J. (1995). (A new species of ''Ceratozamia'' (Zamiaceae) from Oaxaca, Mexico with comments on distribution, habitat, and relationships. ) ''Phytologia'' 79(1), 51-57.〕 ==References==
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