Mammillaria


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Mammillaria

 

globular or short-cylindrical cacti. The stem is covered with tubercles that grow from the bases of the leaves. On top of the tubercles are areolae (adapted axillary buds), with tufts of hairs and thorns. The flowers and lateral shoots are borne in the axils of the tubercles. The flowers are usually small and grow in a wreath at the top of the stem. The fruits are berry like and ripen in the second year. There are more than 350 species (according to other sources, only about 200), found in the arid regions of Mexico, Venezuela, and Colombia. They grow on small hills or on mountains with elevations up to 2,800 m above sea level. Some species form large clumps. Many of these cacti are ornamentals; they are raised in greenhouses or as house plants. The plants are propagated from seeds and cuttings.

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Curiously, these species are mainly globose cacti, such as Ariocarpus fissuratus, Epithelantha bokei, Mammillaria magnimamma, M.
The presence of mycorrhizae has also been reported in Mammillaria magnimamma (Ruedas et al.
For instance, a high concentration of nutrients significantly increased seedling growth in Mammillaria magnimamma, Pachycereus hollianus, and P.
This pattern was observed in species with different life-forms, such as the globose cacti Coryphantha robbinsorum, Mammillaria crucigera, M.
Species in the different genera of globose cacti, such as Mammillaria, Sclerocactus, and Turbinicarpus (Martinez et al.
Field observations regarding flower and fruit production in some cactus species (Carnegiea gigantea, Echinomastus erectrocentrus, Lophocereus schottii, Mammillaria crucigera, M.
Coryphantha, Echinocactus, Epithelantha, Mammillaria, and Turbinicarpus), as well as species of Echinocereus.
4], Mammillaria, Thelocactus, Turbinicarpus), and Cereeae (Praecereus) (Boke, 1959; Anderson, 1987; Mauseth, 1996).
Laticifers have been only observed in members of Cacteae (Coryphantha, Leuchtenbergia, and species of two Mammillaria sections) by Mauseth (1978a, 1978b).
1998; Sajeva & Mauseth, 1991 Leuchtenbergia principis Eggli, 1984; Mauseth & Plemons- Rodriguez, 1998; Sajeva & Mauseth, 1991 Lophophora williamsii Eggli, 1984; Gibson, 1973; Mauseth & Plemons-Rodriguez, 1998; Sajeva & Mauseth, 1991 Mammillaria brandegeei, M.
Taxonomische Untersuchung der Gattung Mammillaria Haw.