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Discocactus heptacanthus
Scientific Name: Discocactus heptacanthus (Barb.Rodr.) Britton & Rose
Synonym: Discocactus pachythele, Discocactus promentigibbus, Discocactus piauiensis, Discocactus hartmannii var. patulifolius, Discocactus rapirhizus, Discocactus paranaensis, Discocactus silvaticus, Discocactus nigrisaetosus, Discocactus patulifolius, Discocactus catingicola ssp. rapirhizus, Discocactus semicampaniflorus, Discocactus silicicola, Discocactus spinosior, Discocactus squamibaccatus, Discocactus subterraneo-proliferans, Discocactus heptacanthus ssp. melanochlorus, Echinocactus hartmannii, Discocactus hartmannii ssp. setosiflorus, Discocactus cangaensis, Malacocarpus heptacanthus, Discocactus lindaianus, Discocactus magnimammus ssp. bonitoensis, Discocactus melanochlorus, Discocactus crassispinus, Discocactus crassispinus ssp. araguaiensis, Discocactus estevesii, Discocactus flavispinus, Discocactus goianus, Discocactus diersianus ssp. goianus, Discocactus griseus, Discocactus catingicola var. griseus, Discocactus mamillosus, Discocactus hartmannii, Discocactus hartmannii ssp. giganteus, Discocactus boliviensis
Family: Cactaceae
Listed in CITES Appendix 1
Discocactus  heptacanthus
Discocactus nigriseatosus (HU448) at Mile's To Go Cactus Nursery
Recommended Temperature Zone:
USDA: 10-12

Frost Tolerance: Keep above 45F (7C) at any time

Minimum Avg. Temperature: 60F (15C)

Sun Exposure: Light shade

Origin: Bolivia, Brazil, Paraguay

Growth Habits: Solitary, light green stems, 3.2 to 10 inches in diameter (8-25 cm), 2.8 to 6 inches tall (7-15 cm); 10-14 ribs; 5 to 11 spines.

Watering Needs: Regular summer water


This species is very variable and many names that are considered here included in it are still used in the trade:
D. boliviensis is 10 to 11 inches in diameter (25-28 cm), has 12 to 13 ribs, 5 whitish spines, 2 inches long (5 cm), pale pink flowers, in summer.
D. cangaensis is 5.2 inches in diameter (13 cm), has 10 to 14 tuberculate ribs, occasionally a central spine, 5 to 9 radials, white nocturnal flowers, up to 3 inches long (7.5 cm).
D. crassispinus has 15 ribs; 4 to 6 spines

Blooming Habits:
White nocturnal flowers in summer, 2 to 3 inches long (5-7.5 cm)

Fruiting Habits:

Check for Field Collection numbers at Ralph Martin's Site

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