Mammillaria sonorensis
Cact. Succ. J. (Los Angeles) 12: 155. 1940
Family
Cactaceae
Genus
Species
Mammillaria sonorensis
Author
R.T.Craig
Chinese genus
乳突球属
Chinese name
-
DescriptionEdit description
Central Spines
1 to 4, reddish-brown, awl- to needle-like, reddish brown, 5 - 45 mm long.
Description
Mammillaria sonorensisSN|9417]]SN|15981]] is a globular cactus solitary at first, later forming large mounds. The tubercles are keeled, firm, dull bluish-green with well-defined radial spines which are easily distinguishable from the centrals. It will reward the skilled growers with ring of deep pink flowers with darker midveins circling the crown of the plant.
Note
This member of the Cactaceae family was given this name for the occurrence in the Mexican state of Sonora.
Tubercles
Globular-triangular, not sharp angled, keeled, firm, dull bluish-green.
Flowers
Deep pink with darker midveins, to 20 mm long and in diameter.
Blooming Season
Spring (March and April in habitat).
Taxonomic
Mammillaria sonorensisSN|15981]]SN|15981]] is extremely variable in size and length of spine and tubercles, comprises several questionable varieties and its taxonomic history has undergone several changes. Craig segregated the varieties longispina, brevispina, gentry, hiltonii and maccartyi that were described in the "Cact. Succ. Journ. of Amer.", Vol. XII
Stem
Globose, apex depressed, simple or cespitose 6 - 8 cm or more in diameter. With latex.
Radial Spines
8 to 15, slender, needle-like, whitish to cream, with brownish tips, 1 - 20 mm long, upper ones shortest.
Areoles
Oval, woolly in youth; axils woolly, but with only occasional bristles.