Mammillaria Haworth (1812)

(Cochemiea, Dolichothele, Mammilloydia, Mamillopsis)
(Latin mam[m]illa = nipple or teat)
Nipple cactus, Fishhook cactus
because of the nipples (tubercles) that typically cover the cactus
Mamillaria or Mammillaria?
Whereas the name of the Nipple cactus derived from Mamilla (=papillules) and of Mamma (=nipple)
were both variant forms of spelling reasonable.
globularly to oblong, simple or clumping; ribs complete dissolved into tubercles
tubercle rows overlap spirally oneself in definite quantity (tangent line, skewed line)
axils bare or different wooly and bristly; areoles on the tip of the tubercle; spines very different
flowers around the crown, appear in the axils, mostly small, on hooked, short columnar species of the areas Sonora,
southern Arizona and Baja California considerably larger, coloration different, white to yellowish, red to violet
fruits red or green; seeds yellowish, reddish or black

Highslide JS
 

Distribution

southern USA, Mexico (main distribution area), central America, Great Antilles and Little Antilles,
north Columbia, Venezuela, West India Islands
very warm steppes, partly to the high mountains to 9840 ft (3000 m) altitude

Growth period

light, airy and warm
species with a dense spination or hairs, that they appear complete white, yellow or brown,
prefer a full sunny and warm location
but the species with a lesser spination, that they appear more green, prefer a half shady location
adequate watering during the growth period, species with a dense spination and especially densely white spination,
also species with a taproot, should get lesser watering
generally is to much moisture to avoid

Winter period

preferably light and dry at 41–50 F (5–10°C)
the species from the coast of Mexico and Baja California prefer a warmer location during the winter
warmer and with somewhat moisture also species who bloom in late fall and during the winter

Substrat

minerally, nutrient rich and permeable to water
addition of coarsely sand, perlite and crushed lava or pumice is recommendable
   
Mammillaria guelzowiana var. robustior R. Wolf (1986)
 
Highslide JS
  Highslide JS   Highslide JS
         

Habitat

Mexico
Durango - Puente Rio Nazas in the mountains on rocky soil
in 4265–5580 ft (1300–1700 m) altitude

Description

named after Robert Guelzow
ca. 2.7 in (7 cm) high, 2.3 in (6 cm) Ø, with watery sap, initially simple, later clumping
axils bare
areoles yellow
radial spines very numerous, to 0.6 in (1.5 cm) long, hair like and bristly, white

1 central spine, shorter, hooked, yellowish to reddish brown
flowers 2 in (5 cm) long, 2.3 in (6 cm) Ø, crimson, self sterile, 4–5 days open
fruits longish globular, light red
seeds almost black

Flowering time

May–June in cultivation
June–July in habitat
3–4 years from seed

Comment

During the winter a cold, airy and dry location.
During the summer keep not to dry. Older plants are somewhat sensitive to too much moisture.
The soil should be permeable to water with a minerally amount.
Synonyms Mammillaria guelzowiana Werdermann (1928)
CITES Appendix II
 
Description of "Kakteen von A bis Z" by Walter Haage with courtesy by Kakteen-Haage made available.

 

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