Mammillaria longimamma
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Mammillaria longimamma |
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Mammillaria longimamma is a species of the genus Mammillaria in the cactus family(Cactaceae). The epithet of the species means long-term .
description
Mammillaria longimamma usually grows individually at first, later branches out from the base and forms small groups. Their roots are a bit bulbous. The spherical, glossy green shoots reach a height and a diameter of 8 to 15 centimeters. The distant, long warts are soft, cylindrical and have an elliptical cross-section. You are without milky juice . There is only sparse wool in the axillae . The central spine , of which there are sometimes 2 to 3, but which can also be absent, is whitish with a dark tip and up to 25 millimeters long. The white to pale brown radial spines, 8 to 10, are awl-like, straight or slightly curved and 12 to 20 millimeters long.
The canary-yellow, funnel-shaped flowers have a length and a diameter of 4 to 6 centimeters. The stamens are yellow, the 5 to 8-part stigma is yellow-green. The spherical to egg-shaped yellowish fruits are 10 to 12 millimeters long and contain brown, inverted-egg-shaped dotted seeds .
Distribution, systematics and endangerment
Mammillaria longimamma is common in the Mexican states of Guanajuato , Hidalgo , Querétaro and San Luis Potosí .
The first description was in 1828 by Augustin-Pyrame de Candolle . Nathaniel Lord Britton and Joseph Nelson Rose established in 1923 the now no longer recognized, three species, the genus Dolichothele and included the species as Dolichothele longimamma .
The following species and varieties described are synonyms : Dolichothele longimamma (DC.) Britton & Rose (1923), Mammillaria ueberiformis Zucc. ex whistle. (1837), Mammillaria longimamma var. Ueberiformis (Zucc. Ex Pfeiff.) K.Schum. (1898), Dolchiothele ueberiformis (Zucc. Ex Pfeiff.) Britton & Rose (1923), Neomammillaria ueberiformis (Zucc. Ex Pfeiff.) Fosberg (1931), Dolchiothele longimamma subsp. ueberiformis (Zucc. ex Pfeiff.) Krainz (1974), Mammillaria longimamma var. hexacentra Berg (1840), Mammillaria longimamma var. gigantothele Berg ex CFörster (1846), Dolichothele longimamma var. gigantothele (Berg) Krainz (1974), Mammillaria ueberiformis var. hexacentra SD. (1850), Mammillaria ueberiformis var. Gracilior Meinsh. (1858), Mammillaria barlowii Regel & Klein (1860) and Mammillaria laeta C.F. Forster ex Rümpler (1885).
In the Red List of Threatened Species of IUCN is the species as " Vulnerable (VU) ", d. H. listed as endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 392 .
- Curt Backeberg : Die Cactaceae: Handbuch der Kakteenkunde . 2nd Edition. tape V . Gustav Fischer Verlag, Stuttgart New York 1984, ISBN 3-437-30384-8 , p. 3518 f .
- NL Britton , JN Rose : The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . tape IV . The Carnegie Institution of Washington, Washington 1923, p. 62 f .
Individual evidence
- ^ Mémoires du Museum d'Histoire Naturelle . Volume 17, Paris 1828, p. 113, online .
- ↑ Mammillaria longimamma in the IUCN Red List of Threatened Species 2013.2. Posted by: Gómez-Hinostrosa, C., Sánchez, E., Guadalupe Martínez, J. & Bárcenas Luna, R., 2009. Retrieved December 20, 2013.
