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Accepted Scientific Name: Mammillaria standleyi (Britton & Rose) Orcutt
Cactography 8. 1926 [ cf: Gentry - Publ. Carnegie Inst. Wash. No. 527 (Rio Mayo Pl.) 196 (1942). ] Orcutt
Origin and Habitat: Barranca del Cobre, Chihuahua, Mexico
Altitude: 2200-2300 metres above sea level.
- Mammillaria lindsayi var. cobrensis Repp.
Mammillaria standleyi (Britton & Rose) Orcutt
Cactography 8. 1926 [ cf: Gentry - Publ. Carnegie Inst. Wash. No. 527 (Rio Mayo Pl.) 196 (1942). ]
- Mammillaria standleyi (Britton & Rose) Orcutt
- Neomammillaria standleyi Britton & Rose
- Mammillaria auricantha R.T.Craig
- Mammillaria auritricha R.T.Craig
- Mammillaria bellacantha R.T.Craig
- Mammillaria canelensis R.T.Craig
- Neomammillaria canelensis (R.T.Craig) Y.Itô
- Mammillaria floresii Fritz Schwarz
- Mammillaria hertrichiana R.T.Craig
- Mammillaria laneusumma R.T.Craig
- Mammillaria lindsayi R.T.Craig
- Mammillaria lindsayi var. cobrensis Repp.
- Mammillaria cobrensis (Repp. ex Hils) Rogoz. & Plein
- Mammillaria sinforosensis subs. cobrensis (Repp.) Lizen & R.Schumach.
- Mammillaria lindsayi f. narlinii Rogoz. & Plein
- Mammillaria lindsayi var. robustior R.T.Craig
- Mammillaria lindsayi var. rubriflora Hils
- Mammillaria sinforosensis f. rubriflora (Hils) Lizen & R.Schumach.
- Mammillaria mayensis R.T.Craig
- Mammillaria miegiana W.H.Earle
- Mammillaria montensis R.T.Craig
- Mammillaria xanthina (Britton & Rose) Boed.
Description: Mammillaria lindsayi var. cobrensis is a local or morphological form of Mammillaria lindsayi distinguishable from the type for the stem that is always solitary with a very woolly apex. The stem is dark green and lacks of bristles in the woolly tubercle axils.
Taxonomic note. Some authors consider this species only a form of the widespread an very variable Mammillaria standleyi.
Stem: Symmetrically globose, dark-green, depressed, with apex that appears completely covered by dense white wool, 12-15 cm high and in diameter. With latex.
Tubercles: Conical to quadrangular, keeled, arranged in numerous, close-set spirals. (Parastichy number 13-21) with dense white axillary wool and without twisted bristles.
Areoles: Oval and with white wool when young.
Radial spines: 10-14, white with tan to golden yellow bases, 2 - 8 mm long, upper ones shortest.
Central spines: 2-4, straight, acicular/subulated, rigid, divergent, golden brown, reddish to almost black, the 2-3 uppermost short (approx 4 mm long) long. The lowermost longest 4-12 mm long (or more).
Flowers: Small, funnelform, 15-20 mm long, to 10 mm in diameter, light greenish yellow with orange-yellow midveins. Stamens above the nectar-chamber.
Fruits: Club shaped to cylindrical, attractively deep coloured, dull pinkish-red to scarlet, up to 20 mm long and 2-3 mm wide.
Subspecies, varieties, forms and cultivars of plants belonging to the Mammillaria standleyi group
- Mammillaria floresii Fritz Schwarz: usually solitary. Central spines (2-)4, reddish 5-9 mm long. Radials few to 16, 4-8 mm long. Flowers purplish red to 12 mm long. Distribution: San Bernardo, Sonora.
- Mammillaria lindsayi R.T.Craig: forms clumps up to 1 m wide, has white axillary wool and bristles. Radial spines 10-14 white, centrals 2-4 , straight, brown to black, flowers greenish yellow. Distribution: Chihuahua and Sinaloa, Mexico.
- Mammillaria lindsayi var. cobrensis Repp.: is distinguishable from the type for the stem that is always solitary with a very woolly apex. The stem is dark green and it lacks of bristles in the woolly tubercles axil. Distribution: Barranca del Cobre, Chihuahua, Mexico.
- Mammillaria lindsayi var. rubriflora Hils: as the name implies it has reddish flower.
- Mammillaria miegiana W.H.Earle: mostly solitary with stems, densely covered by spines appearing white and producing large, dark reddish-pink flowers with scarlet midveins. Distribution: Northem Sonora.
- Mammillaria standleyi (Britton & Rose) Orcutt: very variable, with white radial spine, brownish centrals and white wool between the tubercles. Flowers purplish up to 12 mm long. Distribution: Chihuahua, Sinaloa, and Sonora.
Bibliography: Major references and further lectures
1) Pilbeam J., “The Cactus file, Mammillaria” 6: 120, Cirio Pub. Services, 01/Dec/1999
2) Antonio Gómez Sánchez "Enciclopedia ilustrada de los cactus y otras suculentas" Mundi-Prensa Libros, 2006
3) James Cullen, Sabina G. Knees, H. Suzanne Cubey "The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass" Cambridge University Press, 11/Aug/2011
4) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. "The New Cactus Lexicon" dh books, 2006
5) Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
6) Burquez Montijo, A. & Felger, R.S. 2013. Mammillaria standleyi. In: IUCN 2013. "IUCN Red List of Threatened Species." Version 2013.2. <www.iucnredlist.org>. Downloaded on 13 January 2014.
Cultivation and Propagation: This plant is easy to cultivate but very slow growing. Cultivate it in a well drained and mineral substratum. Water regularly, avoid the use of peat or other humus sources in the potting mixture. It need full sun, so it keep a compact and flat shape. It does not tolerate intense cold, but tolerates some cold if kept dry. Frequent transplantations of the young plants protect the lower part of the stem from the lignification, to which the plant has a tendency.
Reproduction: It is propagated by seed. Sometimes old plants forms large clumps with several joints - but the removal of one of these joints may prove fatal to the plant.
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