Xerophyte

Central Spines

Absent (occasionally 1 or 2)

Description

Habit

Roots

Tuberose root.

Note

The plant described as Acanthocalycium aurantiacumSN|27]]SN|27]], now included in this taxon has red flowers with orange centres.

Flowers

Yellow or red and yellow flowers in summer, up to 6 cm long and in diameter.

Stem

Up to 15 cm tall, 8 cm in diameter; 8-14 rounded ribs; covered by a protective blue-grey layer of pruina.

Radial Spines

5 to 10, dark with a clear base up to 2.5 cm long.

Fruits

Dark green, globose, 2 cm in diameter.