|Scientific Name:||Coryphantha pycnacantha|
|Species Authority:||(Mart.) Lem.|
Mammillaria pycnacantha Mart.
|Taxonomic Notes:||Basionym: Mammillaria pycnacantha Martius.
Synonyms = Mammillaria pycnacantha spinosior Monville ex Salm-Dyck, Hort. Dyck 1844: 14, 1845; Echinocactus pycnacanthus Poselger, Allg. Gartenz. 21:102, 1853; Cactus pycnacanthus Kuntze, Rev. Gen. Pl.1, 1891; Mammillaria acanthostephes Lehmann, Allg. Gartenz. 3:228, 1835; Mammillaria acanthostephes recta Hort ex Labouret, Monogr. Cact. 138, 1853; Cactus acanthostephes Kuntze, Rev. Gen. Pl. 1:260, 1891; Mammillaria magnimamma Otto, Allg. Gartenz. 29:228, 1835 [non Haworth, 1824]; Mammillaria magnimamma lutescens Salm-Dyck, Cact. Hort. Dyck 1849 ,121, 1850; Mammillaria arietina Lemaire, Cact. Aliq. Nov.10, 1838; Mammillaria arietina spinosior Lemaire, Cact. Gen. Nov.Sp.94, 1839; Mammillaria scepontocentra Lemaire, Cact. Ge. Nov. Sp.43, 1839; Cactus scepontocentrus Kuntze, Rev. Gen. Pl. 1, 1891; Mammillaria winkleri Foerster, Allg. Gartenz. 15:50, 1853; Echinocactus winkleri Poselger, Allg. Gartenz.21:102, 1853; Cactus winkleri Kuntze, Rev. Gen. Pl. 1, 1891; Coryphantha connivens Br.& R., Cactaceae 4:34, 1923; Coryphantha andreae Purp. & Boed. 1928.
|Red List Category & Criteria:||Endangered A2c+4c; C2a(i) ver 3.1|
|Assessor/s:||Dicht, R.F. & Lüthy, A.D.|
|Reviewer/s:||Stuppy, W. & Taylor, N.P. (Cacti & Succulent Plant Red List Authority)|
The plants grow on deep lava soils, which is usually the best arable land. The distribution to the east of Mexico City is in fact the most intensively cultivated area in Mexico. Nearly all potential habitats are cultivated and the subpopulations known are mostly reduced to very small areas along railway-tracks, basureros, etc. There is only one large subpopulation which occurs within a tourist resort and is known to be more-or-less safe from agriculture. A very rapid and continuous decline in the extent of occurrence took place and will continue. Several locations are known, but most of them consist of a only few remaining plants. Estimated generation length is 11 years.
|Range Description:||The exent of occurrence is large (28,000 km²), but there are only a few locations left, most of them containing less than 20 plants. In total the remaining population probably only totals several hundred plants.|
Native:Mexico (Hidalgo, Puebla, Veracruz)
|Range Map:||Click here to open the map viewer and explore range.|
|Habitat and Ecology:||Deep and flat lava soils in grass or besides anthills. Occurs together with opuntias.|
|Major Threat(s):||The remaining portions of habitat with suitably large enough populations should be protected. Plants should also be propagated.|
|Conservation Actions:||Listed on CITES App. II.|
|Citation:||Dicht, R.F. & Lüthy, A.D. 2002. Coryphantha pycnacantha. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 24 May 2013.|
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