Mammillaria schwarzii

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
PLANTAE	TRACHEOPHYTA	MAGNOLIOPSIDA	CARYOPHYLLALES	CACTACEAE

Scientific Name:

Mammillaria schwarzii

Species Authority:

Shurly

Common Name/s:

Spanish

–

Biznaguita

Taxonomic Notes:

Accepted as a valid species by Anderson (2001), Hunt (1999) and Pilbeam (1999).

Assessment Information [top]

Red List Category & Criteria:	Critically Endangered A2ad+3d+4ad; B1ab(v)+2ab(v) ver 3.1
Year Published:	2002
Annotations:	Needs updating
Assessor/s:	Fitz Maurice, W.A. & Fitz Maurice, B.
Reviewer/s:	Stuppy, W. & Taylor, N.P. (Cacti & Succulent Plant Red List Authority)
Contributor/s:
Justification: Qualifies due to its small population in a single area, where it continues to decline as a result of illegal collecting. Since this species was rediscovered in 1987 (Fitz Maurice 1988), the population has diminished by an estimated 90% (Fitz Maurice 1994a, b).

Geographic Range [top]

Range Description:	Grows near San Felipe on a steep volcanic rock face about 100 m (plan view) by 4 km long. Current estimated population size is less than 1,000 individuals.
Countries:	Native: Mexico (Guanajuato)
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population Trend:	Decreasing

Population Trend:

Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	Grows on steep volcanic rock in semi-desert at about 2,300 m altitude.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	very threatened by illegal collecting. The locality is a standard stop for cactus tour groups from Europe and is now well known to both commercial and amateur collectors.

Major Threat(s):

very threatened by illegal collecting. The locality is a standard stop for cactus tour groups from Europe and is now well known to both commercial and amateur collectors.

Conservation Actions [top]

Conservation Actions:	Listed on CITES App. II, but enforcement of the law in countries of destination is needed. This species has been widely propagated worldwide for 40 years.

Conservation Actions:

Listed on CITES App. II, but enforcement of the law in countries of destination is needed. This species has been widely propagated worldwide for 40 years.

Citation:	Fitz Maurice, W.A. & Fitz Maurice, B. 2002. Mammillaria schwarzii. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 23 May 2013.
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