Mammillaria geminispina
Mammillaria geminispina subsp. geminispina
Mammillaria geminispina is a species of the genus Mammillaria in the cactus family ( Cactaceae ). The specific epithet is derived from the Latin words for gemini, twin ', and for spina, thorn ' and refers to the usually present two central spines.
Description
Mammillaria geminispina has a short cylindrical body with a height up to 18 cm and a diameter of up to 8 cm. It tends appearing to form large, white, closed groups. The 16 to 20 chalky white radial spines are only 5-7 mm long. You are crowned by two to six up to 4 cm long central spines. The flowers are deep pink to carmine red with a dark center and a size up to 2 cm in diameter. The fruits are carmine. The seeds are brown.
Mammillaria geminispina subsp. leucocentra differs from the nominate race by 5-6 central spines.
Distribution, systematics and hazard
Mammillaria geminispina is native to the Mexican states of Hidalgo, Querétaro and San Luis Potosi. Here she comes in front of 900-1800 meters.
The first description was in 1824 by Adrian Hardy Haworth.
Synonyms are the following species and varieties described: Mammillaria bicolor clay. ( 1830), Mammillaria dedalea Scheidw. (1837 ), Mammillaria nivea H.Wendl. ex Pfeiff. (1837 ), Mammillaria bicolor var nivea ( H.Wendl. Pfeiff ex. ) K.Schum. (1898), Mammillaria geminispina nivea var H.Wendl. Borg ( 1937), Mammillaria toaldoae clay. (1838 ), Mammillaria eburnea Lem. (1839 ), Mammillaria nivea var daedalea Lem. (1839 ), Mammillaria nobilis Pfeiff. (1840 ), Mammillaria bicolor var nobilis ( Pfeiff. ) CFFörst. (1846), Mammillaria geminispina var nobilis ( Pfeiff. ) Backeb. (1961 ), Mammillaria bicolor var longispina Salm- Dyck (1845 ), Mammillaria nivea var brevispina Hildm. (1888), Mammillaria geminispina var brevispina ( Hildm. ) Backeb. (1961 ), Mammillaria leucocentra A.Berg (1840 ), Mammillaria albata Repp. (1987 ), Mammillaria albata longispina var Repp. (1987) and Mammillaria albata var sanciro Repp. (1987).
We distinguish the following sub- types:
- Mammillaria geminispina subsp. geminispina Haw. : The nominate form has two white central spines with dark tip
- Mammillaria geminispina subsp. leucocentra ( A.Berg ) D.R.Hunt: The first description was in 1840 by Alexander Berg leucocentra as Mammillaria. David Richard Hunt she presented in 1997 as a subspecies of Mammillaria geminispina. The subspecies has 5-6 pure white central spines.
In the Red List of Threatened Species IUCN, the type is known as " Least Concern ( LC) ," ie, than not led at risk.