Tylecodon bruynsii
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Tylecodon bruynsii |
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| van Jaarsv. & SAHammer |
Tylecodon bruynsii is a species of the genus Tylecodon in the family of thick-leaf plants (Crassulaceae). The specific epithet bruynsii honors the South African botanist Peter Vincent Bruyns , who discovered the species in Namibia .
description
Tylecodon bruynsii grows as a much branched plant with a diameter of up to 40 centimeters. Fibrous roots are formed. The smooth, light gray branches have peeling bark and a gray-green epidermis underneath. They are up to 180 millimeters long and 15 to 20 millimeters wide and are covered with slightly raised phyllopodia. The 2 to 4 millimeters thick and gray-green leaves are spread out in rosettes at the tip of the shoot. The blade is obovate to rounded and is 20 to 30 millimeters long and 16 to 22 millimeters wide. The sometimes lobed leaves have a blunt to rounded tip and are flat to concave on top. The entire-edged leaves are covered on both sides with short, translucent glandular hairs and stand on an indistinct, up to 2 millimeter long stalk.
The inflorescence, which is up to 55 millimeters high, consists of thyrses with 2 to 5 monochasias , which in turn have 1 to 4 individual flowers. The greenish flower stalk covered with glandular hairs is 5 millimeters long and has a diameter of 2.5 millimeters at the base. The linear-lanceolate bracts are 4 millimeters long and 1 millimeter wide. They quickly turn yellow and fall off. The green sepals are densely covered with glandular hairs and are 3 millimeters long and 1.5 millimeters wide. The corolla covered with glandular hairs is mottled pale green and yellow. It is 12 to 14 millimeters long and has a diameter of 4 millimeters at the base and widens to 6 millimeters towards the opening. The white and pointed tips are 5 millimeters long and 3 millimeters wide and are bent back. The stamens become 10 millimeters long and are not protruding.
Systematics and distribution
Tylecodon bruynsii is endemic in southern Namibia , in the Kuamsib massif in the ǀAi-ǀAis Richtersveld Transfrontier Park . The species grows in shady places on south-exposed sandstone rocks at altitudes of 700 to 900 meters. It occurs at the site together with Aloe pavelkae , Conophytum ricardianum and many other succulent species.
The first plants were found on an expedition by Peter Vincent Bruyns and Petr Pavelka in the Hunsberge area in the Succulent Karoo .
It was first described in 2009 by Ernst Jacobus van Jaarsveld and Steven A. Hammer .
literature
- E. van Jaarsveld, S. Hammer: Tylecodon bruynsii A new cliff-dwelling species . In: Cactus and Succulent Journal . Volume 81, number 5, 2009, pp. 235-239, DOI: 10.2985 / 015.081.0503
