Euphorbia cylindrifolia
| Euphorbia cylindrifolia | ||||||||||||
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Euphorbia cylindrifolia subsp. tuberifera |
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| Scientific name | ||||||||||||
| Euphorbia cylindrifolia | ||||||||||||
| Marn.-Lap. & Rough |
Euphorbia cylindrifolia is a species of the genus spurge ( Euphorbia ) in the family of Euphorbiaceae (Euphorbiaceae).
description
The succulent Euphorbia cylindrifolia forms underground, root-forming runners that end in vertical shoots. These reach a diameter of 5 millimeters, are up to 15 centimeters high and are only slightly branched. The thick leaves are at the shoot tips and are up to 2.5 centimeters long. They are round and have a diameter of 3 millimeters. A deep groove is formed on the top of the sheet. The stipules are tightly packed in a spiral on the shoot and split into membrane-like hairs up to 2 millimeters thick. They are short-lived and later fall off.
Terminal and simple cymes are formed, which are located on inflorescences up to 3 centimeters long. The nodding bracts are about 7 millimeters long and 6 millimeters wide. They envelop the cyathia and are yellowish pink in color. The cyathia reach about 2 millimeters in diameter and the elliptical nectar glands are colored yellow. The bluntly lobed fruit is about 4 millimeters in size. Nothing is known about the seed.
Distribution and systematics
Euphorbia cylindrifolia is widespread in the south-east of Madagascar in the dry thorn bush land.
The species was first described in 1961 by Julien Marnier-Lapostolle and Werner Rauh .
The following subspecies are distinguished:
- Euphorbia cylindrifolia subsp. cylindrifolia
- Euphorbia cylindrifolia subsp. tuberifera Rauh (1963); In contrast to the trunk species, a tuberous, up to 10 centimeter large root with a flattened top is formed; Furthermore, several shoots are driven out of the tuber tip, which are up to 15 centimeters high; there are no runners. In the specialist literature it is noted that the subspecies may not be distinguishable from the parent species, that the parent species also forms a tuber as a seedling.
swell
- Urs Eggli (ed.): Succulent lexicon. Dicotyledons (dicotyledons) . Eugen Ulmer, Stuttgart 2002, ISBN 3-8001-3915-4 , pp. 135 .
Individual evidence
- ^ W. Rauh and Dieter Andreae: Remarkable succulents from Madagascar - Euphorbia cylindrifolia Marnier-Lapostolle et Rauh, a new succulent Euphorbie from Madagascar In: Cacti and other succulents . Vol. 12, No. 5, 1961, pp. 66-70.
