Cactus pretiosus
Revis. Gen. Pl. 1: 261. 1891 [5 Nov 1891]
Family
Cactaceae
Genus
Species
Cactus pretiosus
Author
(Ehrenb.) Kuntze
Chinese genus
-
Chinese name
-
Accepted
DescriptionEdit description
Description
Mammillaria lasiacanthaSN|9075]]SN|9075]] are usually unbranched or slowly clustering, deep-seated in substrate and inconspicuous.
Roots
Diffuse not enlarged.
Flowers
1-2,5 cm; white or cream, usually with sharply defined midstripes of green, yellow, tan, pink, pale purple, or reddish, blooming from January to March
Field Number
Adults of Mammillaria lasiacanthaSN|9075]]SN|9075]] usually have glabrous spines, but in the SB500 population all plants may retain plumose spines at maturity.
Spines
40-80 per areole, in several series but all equally thin, mostly appressed, white or very pale pink, often minutely tipped pinkish brown, innocuous, bristlelike, 0,5-6 mm, glabrous to plumose, all interpreted as radial, innermost spines shortest; No central spines.
Stem
Depressed-spheric to short cylindric, 1-3.5cm wide × 1,5-7 cm tall. axils bare.
Fruits
Scarlet, cylindric or clavate, 10-25 mm long with floral remnant persistent ripening in June August.