Piaranthus punctatus is one of the most beautiful species, whose flowers differ from all the others by its clearly developed corolla tube. The corolla lobes are broadly lanceolate, pointed, white to ivory-coloured with reddish or brown patches or transverse bands; the upper side has fine, papillous warts. Colour variations occur in the species. Piaranthus superficially resembles Huernia, but the flower stalks emanate all along the length of the stems, also near the top. In Huernia species flowers grow from the stem base. Huernia flowers grow solitary, while Piaranthus may issue more from the same node. There is no annulus here, common in Huernia
Piaranthus punctatus is an easy obliging blooming plant, which is happy in any average succulent house. This plant is common to warrant any description, let it suffice to say that this plant is easy to grow and flower, and one which will tolerate most soils and growing conditions. Soil: Since roots are quite shallow, use a cactus mix or add extra perlite or pumice to regular soil potting soil. A gritty, very free-draining compost is suitable, and clay pots help the plants to dry out between watering. Watering: They require moderately watering through the growing season but enjoy plenty of water and some fertiliser in hot weather, this helps them to flower freely. Water more sparingly in winter according to temperatures. But, as with most asclepiads, it is unwise to leave them wet in cold weather. Hardiness: Winter care presents no problems at 5°C with plenty of light. Sun Exposure: Partial sun or light shade. Pest and diseases: They are generally fairly easy to grow, especially if kept pest-free. They are susceptible to stem and root mealy bugs, and damage from these may well initiate fungal attack. If you do have problems with a stem or with basal rotting, you can reliably isolate the healthy parts, dry them off, and re-root them in moist compost. Cultural Practices: Re-pot every 2 years.