Acharagma
Acharagma aguirreanum in culture
Acharagma is a genus with only two species of the cactus family ( Cactaceae ). The botanical name is composed of the Greek a- or - for, without ' and charagma for, furrow '. He points to the lack of furrow on the warts. This is a feature in which the genus of the near allied genus Escobaria different.
Description
The Acharagma species have spherical to short cylindrical body having a diameter of 3 to 7 cm. The ribs are warts, with areoles on the tip dissolved. The spines appear from the areola and are closely packed.
The hermaphrodite flowers appear in the apex and have a diameter and a length of 1.5 to 2 cm. The bloom is yellow to reddish- brown. The green to bronze -colored fruits are clavate and 1 to 2 cm in size. The seeds are brown to black.
Systematics and distribution
The two species of the genus have been described many times in the past and umkombiniert. By assigning to a species, the taxonomist long time did not agree and it ruled several opinions before. The species were classified in Echinocactus, Escobaria, Gymnocactus, Neolloydia, Thelocactus and coryphantha. Charles Edward Glass described the end of 1997, the separate genus Acharagma. On the basis of recent molecular biological studies, a close relationship is excluded to Escobaria. Also by these studies, a direct relationship to Lophophora and Obregonia is displayed.
The type species of the genus Echinocactus is roseanus. A synonym for the genus is Escobaria sect. Acharagma N.P.Taylor.
Currently, the genus consists of the following two listed species, including the subspecies. You are all in Mexico, located in the states of Coahuila and Nuevo Leon.
- Acharagma aguirreanum ( Glass & R.A.Foster ) Glass
- Acharagma roseanum ( Boed. ) E.F.Anderson Acharagma roseanum subsp. roseanum
- Acharagma roseanum subsp. galeanense ( Haugg ) D.R.Hunt