Mammillaria schwarzii

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

View Printer Friendly

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.

Bibliography [top]

	Anderson, E.F. 2001. The Cactus Family. Timber Press, Portland. Fitz Maurice, W.A. 1988. Fieldnotes: The rediscovery of Mammillari schwarzii. Cactus and Succulent Journal (US) 60(2): ? Fitz Maurice, W.A. and B. 1994a. Mammillaria schwarzii revisited. Cactus and Succulent Journal (US) 66(3): ? Fitz Maurice, W.A. and B. 1994b. Der Fall Mammillaria schwarzii. Schumannia 1: 36-38. Hunt, D. 1999. CITES Cactaceae Checklist, 2nd ed. Royal Botanic Gardens, Kew and International Organization for Succulent Plant Study (IOS). IUCN. 2002. 2002 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 8 October 2002. Pilbeam, J. 1999. Mammillaria. Cirio Publishing Services, Southampton. Shurly, E. 1949. Mammillaria schwarzii. Cactus and Succulent Journal of Great Britain 11: 17.

Anderson, E.F. 2001. The Cactus Family. Timber Press, Portland.

Fitz Maurice, W.A. 1988. Fieldnotes: The rediscovery of Mammillari schwarzii. Cactus and Succulent Journal (US) 60(2): ?

Fitz Maurice, W.A. and B. 1994a. Mammillaria schwarzii revisited. Cactus and Succulent Journal (US) 66(3): ?

Fitz Maurice, W.A. and B. 1994b. Der Fall Mammillaria schwarzii. Schumannia 1: 36-38.

Hunt, D. 1999. CITES Cactaceae Checklist, 2nd ed. Royal Botanic Gardens, Kew and International Organization for Succulent Plant Study (IOS).

IUCN. 2002. 2002 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 8 October 2002.

Pilbeam, J. 1999. Mammillaria. Cirio Publishing Services, Southampton.

Shurly, E. 1949. Mammillaria schwarzii. Cactus and Succulent Journal of Great Britain 11: 17.

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.
Disclaimer:	To make use of this information, please check the <Terms of Use>.
Feedback:	If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided