Aporocactus martianus

Aporocactus martianus (syn. Disocactus martianus) is a species of cactus found in Oaxaca, Mexico.

Aporocactus martianus
Conservation status
Near Threatened  (IUCN 3.1)[1]
CITES Appendix II (CITES)[1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Cactaceae
Subfamily:	Cactoideae
Genus:	Aporocactus
Species:	A. martianus
Binomial name
Aporocactus martianus (Zucc. ex Pfeiff.) Britton & Rose
Synonyms[2]
Cereus martianus Zucc. ex Pfeiff. Cereaster martianus (Zucc. ex Pfeiff.) F.Berge Cereus martini Dupuis Eriocereus martianus (Zucc. ex Pfeiff.) Riccob. Aporocactus conzattii Britton & Rose Cereus conzattii (Britton & Rose) A.Berger Disocactus martianus (Zucc. ex Pfeiff.) Barthlott Aporocactus martianus var. conzattii (Britton & Rose) P.V.Heath

Distribution and habitat

A. martianus grows only in Oaxaca, Mexico, in cloud forests and oak forests at elevations of 1,500–2,200 m (4,900–7,200 ft). It is locally abundant within its range.^[1][3]

Description

Disocactus martianus grows creeping, occasionally forming lithophytic with aerial roots. It is a species of fleshy, cylindrical suspended or creeping cactus with stems up to 1.5 meters long and up to 2.5 centimeters thick, sometimes with aerial roots, with 8 to 10 slightly wart-shaped ribs; 3 or 4 central pale brown spines up to 12 mm long and 6 to 20 radial spines are light yellowish and only 5 to 7 millimeters long. The bright red flowers are diurnal and produced in summer, 10 to 12 centimeters in diameter and a length of 5 to 7 centimeters. The flowers stay open for a couple of days. They are followed by globose fruits of green color and 2 cm in diameter. It is viviparous.^[4]

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  Flowers side
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  Flowers

Taxonomy & systematics

Plate 3768 of Aporocactus martianus from Curtis's Botanical Magazine 1840

It was first described as Cereus martianus in 1837 by Ludwig Georg Karl Pfeiffer.^[5] Wilhelm Barthlott moved the species to Disocactus in 1991^[6] The following species and varieties are synonyms:

• Cereus martianus Zucc. (1832),
• Eriocereus martianus Riccob. (1909),
• Aporocactus martianus Britton & Rose (1920),
• Aporocactus conzattii Britton & Rose (1920),
• Cereus conzattii (Britton & Rose) A. Berger (1929)
• Aporocactus martianus var. Conzattii (Britton & Rose) PVHeath (1992).

In their synopsis of the tribe Hylocereeae from 2017, Nadja Korotkova, Thomas Borsch and Salvador Arias interpret the species as a synonym of Aporocactus martianus.^[7]