Opuntia microdasys var. pallida f. crestata

Opuntia microdasys var. pallida f. crestata

Synonyms: Opuntia microdasys var. pallida, Opuntia microdasys var. crestata
Family: Cactaceae
Common Name: wavy bunny ears
Origin: The wavy bunny ears forma of Opuntia microdasys is nursery produced and does not exist in the wild. However, the straight species originates from Mexico, where it is widespread in desert hills and uplands, at elevations from 1,700 to 2,100 meters above sea level.
Description: Opuntia microdasys var. pallida f. crestata is a low branching succulent that forms dense clumps. Differing from the straight species, the wavy bunny ears forma produces pads that are distinctively shaped, with widening and twisted cladodes, and bright yellow glochids. From mid to late spring, equally brilliant yellow flowers may form, although blooming is rare in cultivation. Flowers will be followed by red fruits.

Interesting Features:
- While the crested forma of Opuntia microdasys is due to genetic mutation, variation in normal growth conditions of the straight species – such as light intensity and damage – may also lead to the development of twisting pads. It is not uncommon for both normal and crested forms to vary drastically in appearance. Currently, the exact cause is unknown.
Uses: Opuntia species have been used extensively within their natural habitat. The cacti have been consumed; used to treat numerous ailments, including diabetes and syphilis; utilized as a weight regulator; to treat wounds, and for many other medicinal purposes.
- Additionally, cacti are very important to native bees, and are often found in close proximity with pollinators.

Cultivation and Care:

Watering: Moderate
- Provide weekly waterings from March to October, irrigating whenever soil is dry. Include a diluted, low-nitrogen content fertilizer, unless the soil is rich.
- After September, stop fertilizing, and only water when necessary, to preserve growth.
Soil: The wavy bunny ears succulent should be planted in permeable, well-draining mineral soil, with a pH from 6.1 to 7.8.
- Site in a clay pot just slightly larger than the plant’s existing root system, and repot as needed to encourage growth.
Lighting: Full sun to partial shade is necessary for this species to thrive. For indoor plants with inadequate sun, a grow-light may be needed for up to 14-16 hours each day.
Propagation: Propagation is possible through grafting, and woody and softwood cuttings. Cuttings should be taken in hot weather, with a sterile knife, and allowed to callous before planting. Provide a tray of cactus soil covered with a layer of grit, to allow the roots to grow without exposing the cutting to moisture.
Cold Tolerance: 0°F, USDA hardiness zones 7a to 11, provided that atmospheric humidity is zero.
Special Accommodations: Because of the diversity in development, crested forms of Opuntia microdasys may revert to normal growth without cause. These portions should be removed, to allow the crested forma to resume healthy growth.
- During the winter, a rest period should be observed with little water and no atmospheric humidity. For the rest of the year, however, humidity is preferred between 10 and 30 percent.
- Be alert for additional ailments such as mealybugs, scale insects, and stem rot.

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