Mammillaria Species, Mother of Hundreds

Mammillariacompressa

Family
Cactaceae (kak-TAY-see-ee)
Genus
Mammillaria (mam-mil-AR-ee-uh)
Species
compressa (kom-PRESS-uh)
Synonym
Neomammillaria compressa
Cactus compressa
Mammillaria angularis f. compressa
Mammillaria angularis var. compressa
Mammillaria angularis
Sun Exposure
Sun to Partial Shade
Light Shade
Foliage
Height
under 6 in. (15 cm)
6-12 in. (15-30 cm)
Spacing
9-12 in. (22-30 cm)
12-15 in. (30-38 cm)
Hardiness
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)
Not Applicable
Danger
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Rose/Mauve
Bloom Time
Blooms repeatedly
Other Details
Category
Cactus and Succulents
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; germinate in vitro in gelatin, agar or other medium
Seed Collecting
Allow unblemished fruit to ripen; clean and dry seeds
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Phoenix, Arizona

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Gardener's Notes:

0
positive
2
neutrals
0
negative
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X
Phoenix, AZ (Zone 9b) | September 2004 | neutral

Other synonyms include: Mammillaria bernalensis, Mammillaria cirrhifera, Mammillaria conopsea, Mammillaria centricirrha var. conopsea,...Read More

The subspecies 'compressa' forms large clumps up to about 3&half feet wide and has no central spines per areole.
The other subspecies 'centralifera' has mostly solitary stems but clumps occasionally and has 2 central spines.
The synonym for 'subsp. centralifera' is Mammillaria centralifera.

P
Acton, CA (Zone 8b) | March 2004 | neutral

This is one of the more vigorous mammillaria species and it offsets profusely (probably why the common name). It has long, white spines ...Read More

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