Mammillaria hahniana
Mammillaria hahniana subsp. woodsii
Mammillaria hahniana is a species of the genus Mammillaria in the cactus family ( Cactaceae ). The specific epithet honors the German cactus connoisseurs and collectors from Berlin- Lichtenfelde Adolf Hahn ( † 1954).
Description
Mammillaria hahniana grows breitkugelig with bright green body that sprouts from the base, which turned out to form groups. The individual bodies are up to 9 inches high and up to 10 centimeters in diameter. The warts are conical. The axillae are provided with up to 20 additional weisswolligen thorns. The 20 to 30 radial spines are 1.5 inches long and hair -like white. The 1-4 central spines are shorter whitish, sometimes with reddish tips. The purple flowers are up to 2 inches in diameter in size. The fruits are also purple and up to 7 millimeters in size. The seeds are dirty brown.
Distribution, systematics and hazard
Mammillaria hahniana is common in the Mexican states of Guanajuato, Tamaulipas and Querétaro and is found at altitudes between 750-2200 meters.
The first description was in 1929 by Erich Werdermann.
Synonyms are the following species and varieties described: Mammillaria saetigera Boed. & Crucible ( 1933), Mammillaria bravoae RTCraig (1945 ), Neomammillaria pating liana Bravo ( 1931), Mammillaria pating liana ( Bravo) Werderm. (1931 ), Mammillaria hahniana var pating liana ( Bravo) E.Kuhn (1981, nom. Inval. ICBN article 33.3), Mammillaria woodsii RTCraig (1943) and Mammillaria saetigera subsp. woodsii ( R.T.Craig ) Rogoz. & Plein ( 2002).
We distinguish the following sub- types:
- Mammillaria hahniana subsp. bravoae ( R.T.Craig ) D.R.Hunt: The first description was in 1945 by Robert T. Craig bravoae as Mammillaria. David Richard Hunt she presented in 1997 as a subspecies of Mammillaria hahniana. The subspecies usually has two central spines and 28-30 radial spines. The flowers are deep pink.
- Mammillaria hahniana subsp. hahniana: The nominate only has a central spine and 20 to 30 radial spines. The flowers are deep purple.
- Mammillaria hahniana subsp. pating liana ( Bravo) D.R.Hunt: The first description was in 1931 by Helia Bravo Hollis as Neomammillaria pating liana. David Richard Hunt she presented in 1997 as a subspecies of Mammillaria hahniana. The subspecies usually has 2-4 central spines. Spines often absent. The flowers are pale pink.
- Mammillaria hahniana subsp. woodsii ( R.T.Craig ) D.R.Hunt: The first description was in 1943 by Robert T. Craig as Mammillaria woodsii. David Richard Hunt she presented in 1997 as a subspecies of Mammillaria hahniana. The subspecies usually has two central spines and 25-30 radial spines. The flowers are pink.
In the Red List of Threatened Species IUCN is the species as " Near Threatened (NT) ", ie out to be low risk.