Compact, dwarf perennials forming tufts with many branches bearing a cluster of long-lived leaf pairs
Leaves
opposite, those of a pair dissimilar, ± boat-shaped, keeled, flat or slightly convex on upper surface, often widened towards apex and lobed or toothed on margins, light grey to bluish green; epidermis papillate; outer epidermal wall with a thick crystal layer
Flowers
solitary, terminal, ± 60 mm in diameter, with ebracteate pedicel up to 50 mm long; opening around mid-afternoon and staying open until nightfall
Sepals
5, unequal
Petals
1-seriate, light- to golden-yellow, rarely white
Stamens
4-seriate, epapillate
Nectary
a crenulate, yellowish green ring
Ovary
convex on top; placentas parietal; stigmas 5, greenish, reflexed towards tips
Fruit
a 5-locular capsule of Delosperma type; covering membranes vestigial, as narrow ledges spreading from septa, with weak, central column; expanding keels parallel but not touching, yellowish, broadening towards tips; valve wings broad; closing bodies 0
Seeds
glittering, minutely textured
x = 9
Flowering
in autumn
Distinguishing characters
:
Compact perennials with internodes enclosed by leaves which are asymmetric, toothed, erect, sometimes whitish
Nomenclature:
Schwantesia
Dinter
Dinter: 234 (1927)
Friedrich: 122 (1970)
Herre: 280 (1971)
Zimmermann: 81 (1996a)
Zimmermann: 257 (1996b)
Smith et al.: 152 (1998)
Distribution & Notes:
Southern Africa
: Species 8, occurs in the Northern Cape, from Bushmanland in the east, through the Richtersveld, to the southern parts of Namibia
References:
DINTER, K. 1927.
Schwantesia rüdebuschii
Dtr. gen. novum.
Möllers Deutsche Gärtner-Zeitung
42
FRIEDRICH, H.C. 1970.
Aizoaceae
.
Prodromus einer Flora von Südwestafrika
27
HERRE, H. 1971.
The genera of the
Mesembryanthemaceae
. Tafelberg, Cape Town
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
ZIMMERMANN, N.F.A. 1996a.
Schwantesia constanceae
N.Zimm., spec. nov.-eine neue Art aus dem südlichen Namibia.
Kakteen und andere Sukkulenten
47
ZIMMERMANN, N.F.A. 1996b. The genus
Schwantesia
Dinter.
Cactus and Succulent Journal (U.S.)
68
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