Ruschia perfoliata

Description: Ruschia perfoliata is an erect sparingly branched succulent shrub. They have been known since the 17th century in Europe, but they are still rare in cultivation, probably due to their rather spreading, loose growth requiring some space.

Flowers: 2.5 cm in diameter, rose red.
Water requirements: Drought-tolerant. water regularly; do not overwater
Sun exposure: Full Sun, Sun to Partial Shade, Light Shade
Hardiness:
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz