Coryphantha runyonii 6.5cm
Coryphantha runyonii Britton & Rose
Συνώνυμα: Lepidocoryphantha runyonii (Britton & Rose) Backeb., Mammillaria runyonii (Britton & Rose) Cory
Origin and Habitat: It has a small disjunct range along the lower river-course of the Rio Grande, at sea level, between Brownsville and Rio Grande City (Texas), and a parallel range on the opposite river side in the Mexican state of Tamaulipas.
Description: It is small plant profusely branched with long projecting spines, ultimately forming low mats or hemispheric mounds to 100 cm diameter. The ssp. runyonii is distinguishable for the grey-green stems up to 7.5 cm high and tubercles to 7.5 mm long.
Cultivation and Propagation: It is popular with collectors and easy to grow. It comes from an area of summer rainfall. Keep drier in winter (but for outdoor cultivation it is quite resistant to wet conditions, too). Very cold resistant, hardy about to about -10° C, but the frost resistance varies a lot from clone to clone. Needs good drainage. Keep drier in winter, Full sun to partial shade.