Fishhook pincushion

Mammillaria grahamii

Family:: Cactaceae
Elevation:: 1,500 ft – 5,000 ft
Bloom:: May – Aug
Region:: Southwest

A small, solitary barrel studded with white radial spines and one to several hooked, fishhook-like central spines, easily overlooked among desert rocks. After summer rains it circles its crown with a tidy ring of pink, funnel-shaped flowers, later followed by slender red fruits.

Care · tuned to the Southwest

Water

Drought tolerant with a strong summer-monsoon rhythm; water during warm rains and keep dry in winter. Prone to rot if overwatered or grown in dense soil.

Sun & exposure

Full sun to very light shade; appreciates some afternoon relief in the hottest lowlands.

Soil

Needs gritty, sharply draining, alkaline desert soil; excellent drainage is essential.

In the Southwest

Cold-hardy to about 15–20°F when dry. The hooked central spines readily catch skin, clothing, and fur and are tricky to extract. A collector favorite — buy only nursery-propagated plants.

Common problems & fixes

Basal rot from overwatering, especially in winter
Fix — Grow in fast-draining gritty mix, water on a summer rhythm, and keep dry and cool in dormancy.
Hooked spines snag skin, pets, or clothing
Fix — Handle with a foam collar or tongs and site away from foot and pet traffic.

Pets & toxicity

Not chemically toxic, but the barbed fishhook central spines snag and embed in paws and mouths and are harder to remove than straight spines.

Easy to confuse with

Corkseed fishhook (Mammillaria tetrancistra) — hooked spines but larger flowers and corky seeds
Mammillaria wrightii — shorter hooked spines and larger purple-magenta flowers

Sources

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