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PlantFiles: Mammillaria, Royal Cross
Mammillaria karwinskiana subsp. collinsii

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Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Mammillaria (mam-mil-AR-ee-uh) (Info)
Species: karwinskiana subsp. collinsii

Synonym:Mammillaria collinsii

One member has or wants this plant for trade.

Category:
Perennials
Cactus and Succulents

Height:
under 6 in. (15 cm)
6-12 in. (15-30 cm)

Spacing:
6-9 in. (15-22 cm)
9-12 in. (22-30 cm)
12-15 in. (30-38 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:
Full Sun
Sun to Partial Shade
Light Shade
Partial to Full Shade

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

Bloom Color:
Pale Pink
White/Near White

Bloom Time:
Late Spring/Early Summer
Mid Summer

Foliage:
Succulent

Other details:
This plant is suitable for growing indoors
Drought-tolerant; suitable for xeriscaping
Provides winter interest
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:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From woody stem cuttings
Allow cut surface to callous over before planting
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

Click thumbnail
to view:

By Xenomorf
Thumbnail #1 of Mammillaria karwinskiana subsp. collinsii by Xenomorf

By hanna1
Thumbnail #2 of Mammillaria karwinskiana subsp. collinsii by hanna1

By Xenomorf
Thumbnail #3 of Mammillaria karwinskiana subsp. collinsii by Xenomorf

By Xenomorf
Thumbnail #4 of Mammillaria karwinskiana subsp. collinsii by Xenomorf

By Xenomorf
Thumbnail #5 of Mammillaria karwinskiana subsp. collinsii by Xenomorf

By palmbob
Thumbnail #6 of Mammillaria karwinskiana subsp. collinsii by palmbob

By Xenomorf
Thumbnail #7 of Mammillaria karwinskiana subsp. collinsii by Xenomorf

There are a total of 9 photos.
Click here to view them all!

Profile:

1 positive
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral Xenomorf On Mar 17, 2005, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

The differences between the subspecies are:
--ssp. karwinskiana; has medium yellow flowers with purpleish midviens; No central spines and 6 radial spines.
--ssp. collinsii; has white flowers with deeper pinkish midveins; One central spine and 7 radial spines.
--ssp. beiselii; has white flowers with red tinted midveins; One central spine and 5-8 radial spines.
--ssp. nejapensis; also has white flowers with red tinted midveins, but the spines are larger and white and has much more wool; No central spines and 3-5 radial spines per areole.

Positive hanna1 On Feb 4, 2005, hanna1 from Castro Valley, CA (Zone 9a) wrote:

Min. temp is 50F. Clumping, heads are 3" diameter. Water sparingly. Propogation is thru offsets and seeds. Used to be called: M. Collisii.
Red elongated red fruit is quite attractive.

Regional...

This plant has been said to grow in the following regions:

Phoenix, Arizona
Castro Valley, California
San Marino, California



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