Acharagma

Acharagma
	Acharagma aguirreanum in culture
Systematics
	Nuclear eudicotyledons
Order :	Clove-like (Caryophyllales)
Family :	Cactus family (Cactaceae)
Subfamily :	Cactoideae
Tribe :	Cacteae
Genre :	Acharagma
Scientific name
	Acharagma
	( NPTaylor ) Glass

Acharagma roseanum

Acharagma is a genus of plants , with only two species, fromthe cactus family (Cactaceae). The botanical name is composed of the Greek a- or Toggle for without 'and charagma for, furrow'. He points out the missing furrow on the warts. This is a feature in which the genusdiffersfrom the closely related genus Escobaria .

description

The Acharagma species have spherical to short cylindrical bodies with a diameter of 3 to 7 cm. The ribs are dissolved in warts with areoles at the top. The thorns emerge from the areole and are densely packed.

The hermaphrodite flowers appear in the apex and have a diameter and length of 1.5 to 2 cm. The bracts are yellow to reddish brown. The green to bronze colored fruits are club-shaped 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 and recombined several times in the past. For a long time, the systematists were not in agreement about the assignment to a genre, and several opinions prevailed. The species have been classified into Echinocactus , Escobaria , Gymnocactus , Neolloydia , Thelocactus and Coryphantha . Charles Edward Glass then described the independent genus Acharagma in late 1997 . On the basis of recent molecular biological studies, a close relationship to Escobaria is excluded. These investigations also indicate a direct relationship to Lophophora and Obregonia .

The type species of the genus is Echinocactus roseanus . A synonym for the genus is Escobaria sect. Acharagma N.P. Taylor .

Currently the genus consists of the following two species, including subspecies . They are all located in Mexico , in the states of Coahuila and Nuevo León .

Acharagma aguirreanum (Glass & RAFoster) Glass
Acharagma roseanum (Boed.) EFAnderson
- Acharagma roseanum subsp. roseanum
- Acharagma roseanum subsp. galeanense (Haugg) DRHunt

proof

literature

Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 70-71 .

Individual evidence

^ Charles Edward Glass: Guía para la Identificación de Cactáceas Amenazadas de México . Volume 1, 1997.
^ Charles A. Butterworth, J. Hugo Cota-Sanchez, Robert S. Wallace: Molecular Systematics of Tribe Cacteae (Cactaceae: Cactoideae): A Phylogeny Based on rpl16 Intron Sequence Variation . In: Systematic Botany . Volume 27, No. 2, 2002, pp. 257-270 ( PDF ).
↑ Nigel Paul Taylor: The kinds of the genus Escobaria Britton & Rose . In: Cacti and other succulents . Volume 34, 1983, pp. 76-79, pp. 120-123, pp. 136-140, pp. 154-157.

Web links

Commons : Acharagma - collection of images, videos and audio files

[1] Charles Edward Glass: Guía para la Identificación de Cactáceas Amenazadas de México . Volume 1, 1997.

[2] Charles A. Butterworth, J. Hugo Cota-Sanchez, Robert S. Wallace: Molecular Systematics of Tribe Cacteae (Cactaceae: Cactoideae): A Phylogeny Based on rpl16 Intron Sequence Variation . In: Systematic Botany . Volume 27, No. 2, 2002, pp. 257-270 ( PDF ).

[3] Nigel Paul Taylor: The kinds of the genus Escobaria Britton & Rose . In: Cacti and other succulents . Volume 34, 1983, pp. 76-79, pp. 120-123, pp. 136-140, pp. 154-157.