Uncarina peltata
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Uncarina peltata |
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| ( Baker ) Stapf |
Uncarina peltata is a species of the genus Uncarina in the sesame family (Pedaliaceae).
description
Uncarina peltata grows as a small tree with a sparsely branched crown. It becomes about 2.5 meters high and has a very large, irregular and underground tuber. The rounded-triangular leaf blade is up to 25 centimeters long and up to 25 centimeters wide. 5 to 9 tooth-shaped lobes are formed or the leaf margin is only slightly indented, but the blade is rarely deeply lobed. On the upper side of the leaf there are only a few, individual simple hairs with an occasionally reduced head. These are usually along the larger leaf veins. Short-stalked mucous glands with a square head stand along the smaller leaf veins.
The inflorescence consists of cymes with rarely 2, but mostly 5 to 10 individual flowers, which form dense clusters. The orange-yellow flowers have a purple throat. The flower tube is about 4 inches long.
The side of the fruit, which is strongly compressed, is ovoid in the side view and has a long, narrow, pointed beak . Only hooked spines are formed on the 5 centimeter long and 4 centimeter wide fruits. The hook spines, which are up to 13 millimeters long, are about seven in a row, but they do not go beyond the beak. The greatly broadened bases of the spines form a crest up to 4 millimeters high. No false partitions are formed. The rounded-triangular seeds have wings 1.5 millimeters in size.
Distribution and systematics
Uncarina peltata is endemic in northwest Madagascar , in the provinces Mahajanga and Antsiranana between basalt rocks and limestone plates.
The species was first described as Harpagophytum peltatum Baker in 1890 by John Gilbert Baker . Otto Stapf placed the species in the genus Uncarina in 1895 .
literature
- H.-D. Ihlenfeldt: Uncarina . In: Urs Eggli (Hrsg.): Succulent lexicon. Volume 2: Dicotyledons (Dicotyledons) , Ulmer, Stuttgart 2002, ISBN 3-8001-3915-4 , p. 383
Web links
Individual evidence
- ^ Journal of the Linnean Society. Botany. London, 1890, Volume 25, p. 340 online at biodiversitylibrary.org, accessed October 28, 2018.
- ↑ In: A. Engler (Hrsg.): The natural plant families together with their genera and more important species IV. Part, 3rd section b, p. 261, Leipzig 1895. online at biodiversitylibrary.org, accessed on October 28, 2018.