Ariocarpus Furfuraceus Scientific name: Ariocarpus furfuraceus (S. Watson) C. H. Thomps.
Place of publication: Rep. (Annual) Missouri Bot. Gard. 9:130. 1898
Ariocarpus Furfuraceus Synonyms:
- Ariocarpus retusus Scheidweiler, (1838)
Pubblished in: Bull. Acad. Sci. Brux. 5: 492
- Ariocarpus retusus var. furfuraceus (Watson) Frank, 1975
- Ariocarpus retusus f. furfuraceus
- Ariocarpus retusus subsp. furfuraceus
- Anhalonium furfuraceum (Watson) Coulter, 1894
- Ariocarpus furfuraceus var. rostratus Berger, 1925
- Mammillaria furfuraca Watson, 1890
Common name: Living Rock, Seven Stars
Origin: Widely distributed in Coahuila, San Luis Potosi, Tamaulipas , Zacatecas and Nuevo Leon.
Description: Solitary, slow–growing geophyte cactus, with tubercles slightly projecting above ground level. The large tuberous body is below the soil.
Stem: Grey-green, flattened, globose, rounded on top, 3-12 cm high, 10-25cm in diameter.
Tubercles: The distinctive characteristic of A. furfuaraceus are the tubercles, which are equilaterally triangular shaped, divergent, convex or nearly flattened adaxially and often with shallow adaxial undulations or wrinkling, not fissured, 1.5-4 cm long, 1-3.5 cm wide, nearly as wide as long;
Areoles: At the tips of the tubercles, rounded, 1-5 mm in diameter.
Flowers: Diurnal, 4-5 cm in diameter, 2-4 2cm long; white to clear pink.
Root: Tap root
Flowering time: October
Fruit: white, green, or rarely pinkish, 10-25 mm long, 3-10 mm in diameter.
Ariocarpus retusus is an extremely variable species,. Tubercle size and shape vary widely, and 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
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