Mammillaria
Mammillaria albiarmata

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Mammillaria (mam-mil-AR-ee-uh) (Info)
Species: albiarmata
Synonym:Mammillaria albiarmata
Synonym:Mammillaria coahuilensis subsp. albiarmata
Synonym:Mammillaria coahuilensis var. albiarmata

Category:

Cactus and Succulents

Height:

under 6 in. (15 cm)

Spacing:

3-6 in. (7-15 cm)

6-9 in. (15-22 cm)

Hardiness:

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)

Sun Exposure:

Sun to Partial Shade

Light Shade

Danger:

Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:

White/Near White

Bloom Time:

Mid Spring

Late Spring/Early Summer

Foliage:

Unknown - Tell us

Other details:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Suitable for growing in containers

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:

From seed; direct sow after last frost

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

Gardeners' Notes:

0
positives
2
neutrals
0
negatives
RatingContent
Neutral

On Aug 14, 2008, CactusJordi from El Cajon, CA wrote:

The biggest difference to Mamm. coahuilensis is that Mamm. albiarmata doesn't have that enormous tuberous root which M. c. has.

Jordi

Neutral

On Mar 3, 2005, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

The differences between the 2 subspecies are:
'coahuilensis' is more prevalent than 'albiarmata' and has white flowers tinged with pink rather than pure white like that of the 'albiarmata' subspecies.
The 'albiarmata' subspecies also has denser spine coverage.