Ariocarpus confusus SB1426, Marmelajo, Nuevo
Description: Solitary globose plant, rising
slightly above ground level, rounded on top stem: 10 to 20 cm in
diameter, 4 to 10 cm tall.
The peculiarity of Ariocarpus confusus is that it may develop magenta
flowers, white flowers, variations of the two or even bicoloured flowers
in the same plant.
Tubercles: Upright tan brownish/green to magenta/green
divergent, not crowded or basally compressed, acute at the apices,
flattened and smooth adaxially, not fissured, incurved strongly, 3-8cm
long, 1-2.5cm broad, usually more long than wide
Root: Tap root
Flowers: Extremely variable from Cream-white to rich magenta , 3
to 5 cm in diameter up to 4 cm long .
Blooming season: They come in late autumn or early winter.
Propagation: Seed, but will generally take about 6-10 years to reach
flowering size, occasionally grafted.
Ariocarpus retusus is an extremely
variable species,. Tubercle size and shape vary widely, a terminal
areole is sometimes present at the tip. The vast amount of phenotypic
variation in the species has led to the erection of several variants:
- A. retusus ssp. retusus: widespread, flowers are cream or
white, occasionally with reddish midveins.
- A. retusus ssp. trigonus: somewhat less widespread
with long sharp tubercles twice as long as wide. The flowers are
yellow (usually), white to pinkish white.
- A. retusus v. furfuraceus: applied to plants with
equilaterally triangular shaped tubercles
- A. retusus ‘furfuraceus’ var. rostratus refers to
plants with a more tapered apex to the tubercle.
- A. retusus v. scapharostroides plants from the Villa
Juarez region of SLP, it is characterized by erect angular tubercles,
superficially reminiscent of A. scapharostrus.
- A. retusus confusus nomina nuda
- A. retusus subsp. jarmilae nomina nuda
- A. retusus subsp. horaceki nomina nuda
- A. retusus var. pectinatus nomina nuda
- A. retusus subsp. panarottoi nomina nuda
- A retusus var. minimus is a nomina nuda which has
recently been applied to plants from Echido Nuncio,in San Luis Potosi.
- A. retusus f. major applied to selected cultivated
plants with very broad shaped tubercles (“Tama-botan” in
Photo of conspecific taxa, varieties, forms and cultivars of
Halda et Horáèek,
Published in: Cactaceae etc. Bratislava, 7: 4, 1997
Origin: Aramberri area of Nuevo Leon, Mexico
Conservation status: Listed in
CITES appendix 1
- Ariocarpus retusus
Pubblished in: Bull. Acad. Sci. Brux. 5: 492
- Ariocarpus sp. Aramberri
- Ariocarpus retusus var. Aramberri
Ariocarpus confusus is a controversial taxon erected by Halda & Horacek
in 1998 to indicate the plants of the Ariocarpus retusus/trigonus
complex found in several locations around in the Aramberri region. This
Ariocarpus are extremely variable in body form, and also in flower
colour. Aramberri is located in a valley between two mountain slopes. On
either side of the valley one may find population that looks like the
typical A. retusus while other resembles the typical
A. trigonus, with a
range of intermediates between the two. Morphologically, plants
belonging to the confusus species resemble either the retusus ssp or the
trigonus ssp. However, they are easily distinguished from either of
these retusus sub-species by their interesting variation is in the
flower color, which can range from white through to magenta, a color not
found in any other populations of A. retusus/trigonus. Bicoloured flowers
This is the classical form of the plant with deep magenta flowers
(Note that the magenta pigment also tinges the tubercles)
Cultivation: This species is slow growing if compared with other
retusus forms, but of easy
culture in a well drained non-organic free draining soil compost, with
ample water during the growing season. Use of a weak low-nitrogen
fertilizer during the growing season can encourage growth. The main
threat to their development is root rot. Ariocarpus should be kept dry
whenever there is a threat of cold. The appearance of Ariocarpus can
benefit greatly by watering the plants from the bottom. This practice
will help to keep the “wool” on the top of the plant from becoming
matted or discoloured. Need light shade to full sun. Frost Tolerance:
Hardy to -10° C