Origin of Name
Astrophytum myriostigma 'Onzuka Crest' is a cultivated variety of Astrophytum myriostigma. The name 'Astrophytum' is derived from the Greek words 'astron', meaning star, and 'phyton', meaning plant, referring to the star-like shape of the cactus. The specific epithet 'myriostigma' means 'many spots', alluding to the speckled appearance of the cactus. The term 'Onzuka' is attributed to the Japanese cultivator who developed this variety, while 'Crest' refers to the cristate, or crested, form of this cactus, where the normal apical dominance is altered, leading to a fan-like growth.

Technical Description of Plant
Astrophytum myriostigma 'Onzuka Crest' is characterized by its unique crested form, creating a wavy, sculptural appearance. The plant has a ridged body with a frosty look due to the presence of numerous white, woolly areoles and flecks. The crested form results in a convoluted and undulating growth pattern, which makes each specimen unique. This variety may occasionally produce yellow flowers at the crest's edges during the growing season.

Origin of Plant
Astrophytum myriostigma is native to the desert regions of Northeastern and Central Mexico. The 'Onzuka Crest' variety, however, is a product of selective cultivation and does not occur naturally in the wild.

Conservation Status
As a cultivated variety, Astrophytum myriostigma 'Onzuka Crest' does not have a conservation status. The wild type Astrophytum myriostigma is not listed as endangered, but like all cacti, it could be affected by habitat loss and over-collection in its natural habitat.

Care Instructions
Astrophytum myriostigma 'Onzuka Crest' requires well-draining soil and a pot with good drainage to avoid root rot. It thrives in bright, indirect light but can tolerate some direct sunlight. Water moderately, allowing the soil to dry completely between waterings, and reduce watering in the winter. This cactus prefers a dry, warm climate and should be protected from frost. Minimal fertilization is required. Due to its unique shape, care should be taken to support the crest as the plant grows. Regular inspection for pests and grooming will help maintain its health and distinctive appearance.