Astrophytum ornatum

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Astrophytum ornatum
Astrophytum ornatum5.jpg
Scientific classification
A. ornatum
Binomial name
Astrophytum ornatum

Astrophytum ornatum, the bishop's cap or monk’s hood cactus, is a flowering plant of the family Cactaceae, endemic to the Central Plateau of Mexico. It is the largest and tallest species of Astrophytum.


Solitary and cylindrical in form, it may grow up to 2 metres (6.6 ft) in height and 30 centimetres (12 in) in width on the Central Plateau. It develops numerous white woolly flakes for protection from the sun. It flowers throughout the summer, the flowers being 7 to 8 centimeters long in canary yellow.


It is a rugged plant resistant to root rot, and easy to grow in a well drained soil. It is dark green when grown in filtered light or shade. An established plant is cold tolerant to 25 °F (−4 °C).

Astrophytum ornatum has gained the Royal Horticultural Society’s Award of Garden Merit.[2]

Astrophytum ornatum flowering
It usually has 8 ribs, often in spiral


  1. ^ Sánchez , E.; Guadalupe Martínez, J. & Bárcenas Luna, R. (2017). "Astrophytum ornatum". IUCN Red List of Threatened Species. Version 2013. International Union for Conservation of Nature. Retrieved 4 November 2018.
  2. ^ "RHS Plantfinder - Astrophytum ornatum". Royal Horticultural Society. Retrieved 12 January 2018.

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