Coryphantha macromeris ssp. runyonii
Scientific Name: Coryphantha macromeris ssp. runyonii (Britton & Rose) N.P. Taylor
Synonym: Coryphantha macromeris var. runyonii , Coryphantha runyonii, Lepidocoryphantha macromeris ssp. runyonii , Lepidocoryphantha runyonii, Mammillaria runyoni
Family: Cactaceae
Coryphantha runyonii at the Desert Botanical Garden at the end of April
USDA: 8b-12
Frost Tolerance: Hardy to 14° F (-10°C) if kept dry.
Heat Tolerance: Light shade in summer in Phoenix
Sun Exposure: Full sun to light shade (in summer)
Origin: Lower part of the Rio Grande valley (USA, Mexico), close to sea level.
Growth Habits: Densely clumping, grey green stems, to 3 inches tall (8 cm); rounded tubercles, ip to 0.8 inch long (2 cm); 1 to 3 central spines, up to 1 inch long (2.5 cm); 6 or 7 radials.
Watering Needs: Moderate water when in a growing period, little to no water the rest of the time
Propagation: Seeds, divisions
The C. macromeris ssp. runyonii has grey green stems, reaches only half the size of the Coryphantha macromeris and also has shorter spines.
Blooming Habits:
The Coryphantha macromeris ssp. runyonii has 3 inches wide (7 cm) pink flowers produced sparingly during the summer.
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