Mesembryanthemaceae - Ruschioideae - Eberlanzia Group - Eberlanzia Schwantes
Description:
Shrubs up to 500 mm high, sometimes thorny, erect to procumbent; internodes whitish
Leaves of a pair slightly connate, short and fat with convex sides, mucronate, greyish green to dark green; epidermis with elevations above subhypodermal tannin idioblasts, papillate
Flowers relatively small, ± 10-20 mm in diameter, in richly to poorly branched dichasia, with additional lateral inflorescences, sometimes umbellate and crowded, rarely solitary; spines in inflorescences irregularly distributed, derived from pedicels having lost the fruit; with 2 leafy bracts, with or without bracteoles
Sepals 5, nearly equal
Petals in 1 series or 0, white to violet
Stamens and staminodes present, collected in a cone, often papillate
Nectary a crenulate ring
Ovary raised on top; placentas parietal; stigmas 5, subulate, erect
Fruit capsule close to the Ruschia type; 5-locular; bottom bell-shaped, top convex, valve rims high; valves opening completely, valve wings broad and rectangular; closing bodies white; covering membranes complete with distal closing rodlets and low rims
Seeds smooth, almost round, amber-coloured
x = 9 (1 report)
Flowering throughout the year, peaking in winter
Distinguishing characters:
Flat-growing to erect shrubs
Leaves greyish green or reddish or bluish, textured
Fruit with valves folding back entirely when expanded
Nomenclature:
Eberlanzia Schwantes
Schwantes: 189 (1926)
Friedrich: 42 (1970)
Herre: 144 (1971)
Hartmann & Stüber: 1 (1993)
Hartmann: 29 (1996)
Smith et al.: 350 (1998)
Hartmann: 44 (1998)
Distribution & Notes:
Southern Africa: Species 8, mainly on sandy flats with limestone pebbles characteristic of the southern Namib Desert, Namibia, also in western Namaqualand, Northern Cape
References:
FRIEDRICH, H.C. 1970. Aizoaceae. Prodromus einer Flora von Südwestafrika 27
HARTMANN, H.E.K. 1996. Miscellaneous taxonomic notes on Aizoaceae. Bradleya 14
HARTMANN, H.E.K. 1998. New combinations in Ruschioideae, based on studies in Ruschia (Aizoaceae). Bradleya 16
HARTMANN, H.E.K. & STÜBER, D. 1993. On spiny Mesembryanthema and the genus Eberlanzia (Aizoaceae). Contributions from the Bolus Herbarium 15
HERRE, H. 1971. The genera of the Mesembryanthemaceae. Tafelberg, Cape Town
SCHWANTES, G. 1926. Zur Systematik der Mesembrianthemen. Zeitschrift für Sukkulentenkunde 2
SMITH, G.F., CHESSELET, P., VAN JAARSVELD, E.J., HARTMANN, H., HAMMER, S., VAN WYK, B-.E., BURGOYNE, P., KLAK, C. & KURZWEIL, H. 1998. Mesembs of the world. Briza, Pretoria
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