Please see scale for size. Rooted plants.

Astrophytum myriostigma, commonly known as the Bishop's Cap cactus due to its unique shape resembling a cleric's headwear, is a remarkable and widely admired species within the cactus family. It is renowned for its striking appearance, characterized by a smooth, green body dotted with white flecks and the absence of spines, which distinguishes it from many other cacti.

Origin of Name

The genus name "Astrophytum" is derived from the Greek words "astron," meaning star, and "phyton," meaning plant, reflecting the star-like shape of the cacti in this genus. "Myriostigma" translates to "countless spots," referring to the numerous white dots or trichomes that speckle the plant's surface. These trichomes are thought to help reflect sunlight and conserve moisture, adapting the plant to its native arid environments.

Technical Description of Plant

Astrophytum myriostigma typically grows as a solitary columnar cactus, though it starts its life with a more globular shape. Over time, it can reach heights of up to 3 feet or more. The body is divided into segments that can vary from three to seven ribs, giving it a somewhat spherical to columnar form. The plant's surface is covered in tiny, woolly dots that give it a distinctive, decorated look. During the summer months, it produces large, yellow flowers from the top of the stem, which can be quite striking against the plant's green body. These blooms are followed by red fruits, adding further interest to the species.

Origin of Plant

Astrophytum myriostigma is native to the northeastern and central highlands of Mexico, where it thrives in limestone-rich, arid environments. Its adaptation to harsh sunlight and infrequent watering has resulted in its unique physical characteristics, making it a fascinating study in plant evolution and adaptation.

Conservation Status

As of the last assessment, Astrophytum myriostigma is not listed on the IUCN Red List of Threatened Species, indicating that it is not considered at immediate risk of extinction in its natural habitat. However, like many cacti, it faces threats from habitat loss and illegal collection. Cultivation and responsible trade are essential for its conservation.

Care Instructions

Astrophytum myriostigma prefers bright, indirect light and well-draining soil. It should be watered moderately during the growing season but allowed to dry out completely between waterings. In winter, water very sparingly, as the plant enters a dormant period. This species is not frost-tolerant, so it should be protected from cold temperatures. Fertilize with a diluted, low-nitrogen cactus fertilizer during the growing season to support healthy growth and flowering.

Astrophytum myriostigma is an excellent choice for both novice and experienced cactus enthusiasts, offering striking aesthetics with relatively easy care requirements. Its unique appearance and fascinating flowers make it a standout addition to any collection or as a solitary display in a well-lit room or greenhouse.