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Astrophytum myriostigma – Bishop’s Cap

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Scientific Name

Astrophytum myriostigma Lem.

Common Names

Bishop’s Cap Cactus, Bishop’s-Cap, Bishop’s Hat, Bishop’s Miter Cactus, Bishop’s-Hood

Synonyms

Echinocactus myriostigma

Scientific Classification

Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cacteae
Genus: Astrophytum

Description

Astrophytum myriostigma is a spineless cactus, usually solitary or with very few basal branches. Globular to cylindrical stem, up to 3.3 feet (1 m), and up to 8 inches (20 cm) in diameter, bright green, covered with many minute white hairy scales. Usually 5 ribs, sometimes 3 or 4, increase to 8 or more with age (rarely even 10). Funnelform flowers, up to 3 inches (7.5 cm) long, glossy yellow and sweet scented from the areole at the tip of the stem on mature plant. Greenish to tannish-red fruits, up to 1 inch (2.5 cm) in diameter, covered with brown, overlapping scales, with long wool in their axil.

Astrophytum myriostigma - Bishop’s Cap, Bishop’s Hat

How to Grow and Care

Astrophytums are not vigorous plants and they require a lot of patience to reach their full potential. Keep regularly watering and feeding them during the growing season and repot annually to give them space to develop. They need a temperate, dry winter as well, and make sure not to overwater them to avoid rotting their roots. If given sufficient care, they will develop marvelous flowers once they reach maturity. Repot regularly to help them develop. Astrophytums should be repotted at the beginning of the growing season for best results, allowing them to grow into the impressive specimens for which the genus is known. Protect your hands before repotting due to their stiff spikes and lift the plant out all at once, then replace in a larger pot and backfill with soil. Don’t overwater or overfeed newly repotted cacti, as disturbances can be hard on them… – See more at: How to Grow and Care for Astrophytum.

Origin

Native to the highlands of northeastern and central Mexico.

Subspecies, Varieties, Forms, Cultivars and Hybrids

Astrophytum myriostigma var. nudum
Astrophytum myriostigma ‘Onzuka’

Links

BACK TO genus Astrophytum
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