Plectranthus ernstii
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Plectranthus ernstii in Rombergpark , Dortmund |
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| Plectranthus ernstii | ||||||||||||
| Codd |
Plectranthus ernstii is a succulent plant from the genus of Plectranthus ( Plectranthus ) within the family of Labiatae (Lamiaceae).
description
Vegetative characteristics
Plectranthus ernstii is a stem succulent (caudiciform), perennial herbaceous plant that crouches down and grows upright and reaches heights of up to 25 centimeters. The roots are slightly thickened. The approximately pearl-like shoots are thickened and reach 5 centimeters in diameter. Younger shoots have a square cross-section. The surface of the shoots is brownish longitudinally striped. The broadly egg-shaped to triangular leaves are thickened and 1.2 to 3 inches long and 1 to 2.5 inches wide. The leaf margin is serrated with three pairs of teeth. The top and bottom of the leaves are green in color with violet tones, the surfaces tomentose to balding. On the underside there are reddish brown to pale glandular points that give off a pleasant aromatic scent. The tip of the leaf is pointed to bluntly rounded and the base of the leaf is bluntly rounded to truncated.
Generative characteristics
The racemose inflorescence is 5 to 17 centimeters high and often has side branches. It is a six-flowered pseudo - whorl with the flowers 5 to 12 millimeters apart. The egg-shaped bracts are 3 millimeters large and persistent. The 12-millimeter, white to mauve-colored corolla stands on a 4 to 5 millimeter long peduncle. The bulbous flower tube is 8 millimeters long and is narrowed at the throat. When the fruit ripens, the calyx is 5 millimeters in size. 2 millimeter large, brown nuts are formed.
Systematics and distribution
The distribution area of Plectranthus ernstii is in the South African provinces of Eastern Cape and KwaZulu-Natal . The plants grow on steep quartz sand rocks in mineral soils that are well drained. In the distribution areas fall 800 to 1500 millimeters of precipitation per year.
The first collection of plants of the species took place in 1977 by Ernst Jacobus van Jaarsveld and his wife. The species was first described in 1982 by Leslie Edward Wastell Codd .
There are five cultivars in culture :
- 'Foster's Foley', collected on the Mtamvuna River
- 'Msikaba', collected on the Msikaba River; a shape with more succulent leaves
- 'Mtentu', collected on the Mtentu River, south of Port Edward; a shape with long stems
- 'Oribi', this shape corresponds to the original plant that Jaarsveld had collected; it has thickened, short stems
- 'Sikuba', a shape with less thick stems and dark spots on the flowers
proof
literature
- PI Forster & Ernst Jacobus van Jaarsveld: Plectranthus ernstii . In: Urs Eggli (Hrsg.): Succulent lexicon. Dicotyledons with the exception of Aizoaceae, Asclepiadaceae, Cactaceae and Crassulaceae. tape 2 . Eugen Ulmer, Stuttgart 2003, ISBN 3-8001-3915-4 , pp. 314 .
Individual evidence
- ↑ The Flowering Plants of Africa Volume 47, Plate 1855, 1982
Web links
- Profile at sanbi.org