Epithelantha
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| FACWeber ex Britton & Rose |
Epithelantha is a genus of plants from the cactus family(Cactaceae). The botanical name of the genus is derived from the ancient Greek words ὲπί epi for "on", θηλή thele for "nipple", "teat" translated "wart" and ἄνθος anthos for "blossom" or "flower" and means blossom on the wart .
description
The species of the genus Epithelantha grow individually to many shoots and are very variable in terms of their size, thorns, habit and color. The pressed spherical shoots reach a diameter of 1 to 6 centimeters. They are warty and covered with thorns . At the tip of the 1 to 3 millimeter long warts are small areoles from which 19 to 38 white to light yellow spines arise, which cannot be differentiated into central and radial spines.
The bell-shaped flowers appear from the young areoles at the tip of the shoot. They are white to pink-red and reach a diameter of 3 to 12 millimeters. Your flower cup is bare.
The red, bald, non-tearing fruits are club-shaped, between 3 and 18 long and contain a few, oval, glossy black seeds 1 to 1.5 millimeters in length.
Systematics and distribution
The species of the genus Epithelantha are distributed in the US states of eastern Arizona , New Mexico and western Texas, as well as the Mexican states of Coahuila , San Luis Potosí and Nuevo León .
The first plants were discovered by William H. Emory and described as Mammillaria micromeris by George Engelmann in 1856 . It is the type species of the genus. In 1898, Frédéric Albert Constantin Weber listed Epithelantha as a synonym for Mammillaria micromeris , but did not describe the genus. The first valid description of the genus was in 1922 by Nathaniel Lord Britton and Joseph Nelson Rose .
The genus includes the two species:
- Epithelantha bokei L.D.Benson
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Epithelantha micromeris (Engelm.) FAC Weber ex Britton & Rose
- Epithelantha micromeris subsp. micromeris
- Epithelantha micromeris subsp. greggii
- Epithelantha micromeris subsp. pachyrhiza
- Epithelantha micromeris subsp. polycephala
- Epithelantha micromeris subsp. unguispina
A synonym of the genus is Cephalomamillaria Frič .
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 252-254 .
- NL Britton , JN Rose : The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family . tape III . The Carnegie Institution of Washington, Washington 1922, p. 92-93 .
Individual evidence
- ^ Edward F. Anderson : The great cactus lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 253-254 .
further reading
- Davide Donati, Carlo Zanovello: Epithelantha: nuovi dati su ontogenia, fertilità, simpatria e revisione del genere . In: Piante Grasse . Number 4, 2010, pp. 165–187 (PDF; 784 kB) .
- Davide Donati, Carlo Zanovello: Epithelantha 2011 . The Cactus Trentino Sudtirol Society, 2011.
