Opuntia basilaris - Beaver tail cactus

Opuntia basilaris is an extraordinary prostrate prickly pear cactus. This low-growing, spreading plant is recognisable by its soft blue-grey cladodes, often lacking large thorns but adorned with discreet glochidia. In spring and summer, it is adorned with charming, bright pink crumpled flowers. This species tolerates heat and drought well but not severe frosts, excess water, and long wet winters. Outside the Mediterranean coast, it should be grown in pots. Your cactus can spend the summer on the terrace or be cultivated as a houseplant.

Opuntia basilaris belongs to the Cactaceae family. Native to the southwestern United States, particularly California, Nevada, Arizona, and Utah, as well as northern Mexico, this species thrives in the Mojave and Sonoran deserts, at altitudes ranging from 150 to 1800 metres. These regions are characterised by an arid climate, with hot summers and mild winters, and very low annual rainfall. This prickly pear has a bushy, prostrate habit, forming dense clumps that can reach 40-50 cm in height and spread up to 2 metres wide in the ground. In cultivation, its size is generally more modest, especially when grown in pots, where it rarely exceeds 30 cm in height. Its growth is quite slow, but it can produce new shoots from the base, gradually widening the clump. Opuntia basilaris can tolerate temperatures as low as -5°C, provided the soil remains dry during cold periods. Excessive moisture can lead to root rot. The "pads" or cladodes are stem segments. They are flattened, obovate to almost circular, measuring between 8 and 21 cm long and 5 to 13 cm wide. Their shape somewhat resembles a beaver's tail (hence its English name "Beavertail cactus"). They display a blue-green to grey-blue hue, sometimes with purple tints, and have a finely velvety texture. Unlike other Opuntia species, Opuntia basilaris usually lacks large thorns, though some varieties may have them. However, the areoles are equipped with glochidia, tiny barbed brown bristles, measuring up to 3 mm, which can cause skin irritation if handled without gloves.
Flowering occurs in spring or summer depending on the climate. The flowers of this prickly pear are very beautiful, measuring 5 to 7.5 cm in diameter. The pink to magenta petals surround stamens with deep magenta filaments and a style ranging from white to pink. These flowers appear on the upper margins of the cladodes. To encourage abundant flowering, it is essential to provide the plant with full sun exposure and well-drained soil, dry in winter, mimicking its natural habitat conditions. The fruits that follow flowering are spherical to inverted ovoid, measuring about 2.5 to 3 cm long and 1.5 to 2.2 cm in diameter. When ripe, they turn green and become dry. Although the fruits are edible, their low pulp content and dry texture make them unappealing.

The Shoshone Native Americans used the inner pulp of Opuntia basilaris to make poultices to relieve pain and treat minor wounds. This traditional use highlights the medicinal properties attributed to this species in indigenous cultures.

Opuntia basilaris is a gem for Mediterranean coastal gardens. It naturally fits into an arid rockery or a desert garden. In a pot on a sunny terrace, it creates striking sculptural compositions. To showcase its unique appearance, pair it with small Agaves like the adorable Agave Kikijokan or Opuntia microdasys 'Caress'. In pots, play with textures by pairing it with light pebbles and decorative gravel to create a miniature desert landscape that will be eye-catching all year round!