Euphorbia cooperi
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Euphorbia cooperi |
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Euphorbia cooperi is a species of the genus spurge ( Euphorbia ) in the family of Euphorbiaceae (Euphorbiaceae).
description
The succulent Euphorbia cooperi forms shrubs up to 2 meters high or trees up to 6 meters high. The branches, which are usually unbranched, are curved upwards, are four to six-sided and are up to 20 centimeters thick. Due to strong constrictions, the shoots are divided into inverted conical sections that are 10 to 50 centimeters long. On the winged edges there are bulged teeth at a distance of 5 to 25 millimeters. The thorn shields have grown together to form a 3 to 10 millimeter wide horn rim. Thorns up to 10 millimeters in length are formed.
The inflorescence consists of one to three simple cymes , which are arranged in a horizontal line and almost sessile. The cyathia reach 8 millimeters in diameter. The elongated nectar glands are colored yellow and butt against each other. The ovary is surrounded by a three-lobed flower cover. The bluntly lobed fruit is 7.5 millimeters long and 13.5 millimeters wide. It stands on a thick stem up to 10 millimeters long. It contains the almost spherical seeds that are 3.5 millimeters in size and have a smooth surface.
Branch section
Branches
Flower detail
fruit
Distribution and systematics
Euphorbia cooperi is common in the south of Africa .
The species was first described in 1907 by Alwin Berger .
A distinction is made between the following varieties:
- Euphorbia cooperi . Var calidicola L.C.Leach (1970); Distribution: in the south from Malawi to Mozambique , in central Zambia to the northwest of Zimbabwe in forest areas near rivers; In contrast to the trunk species, the branches are very different in size and habit, fewer edges are formed, which are also more thinly winged, the inflorescence stalks are longer
- Euphorbia cooperi var. Cooperi ; Distribution: in Zimbabwe and from the South African province of North Cape to KwaZulu-Natal in areas with shrub growth
- Euphorbia cooperi var. Ussanguensis (NEBr.) LCLeach (1970), Syn .: Euphorbia ussanguensis N.E.Br. (1912); Distribution: in the south of Tanzania , in the north of Zambia and in Malawi on stony slopes with forest cover at altitudes of 500 to 1730 meters; In contrast to the trunk species, trees are formed up to about 9 meters high, the branches are square to octagonal and the sections of the constrictions are almost round, the fruits are about 6 millimeters wide and 10 millimeters long and stand on a 3 to 5 millimeter long stem, the seed becomes about 3 millimeters in size
swell
- Urs Eggli (ed.): Succulent lexicon. Dicotyledons (dicotyledons) . Eugen Ulmer, Stuttgart 2002, ISBN 3-8001-3915-4 , pp. 132 .
Individual evidence
- ↑ Succulent euphorbias. Description and instructions for determining the cultivated species, with brief information about the culture. P. 83, Eugen Ulmer, Stuttgart 1907.
