Anthotroche
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Anthotroche is a genus ofplantsfromthe nightshade family (Solanaceae) endemic to southwestern Western Australia . It consists of only three types .
description
Vegetative characteristics
The Anthotroche species are 1.5 to 2.5 m high shrubs that are covered with dense hairs of glandular and non-glandular trichomes . The leaves are stalked with 5 to 20 mm long petioles, the leaf blades are ovate, circular, elliptical or vice versa ovoid to closely inverted ovoid elliptical. They have a length of 7 to 35 mm and a width of 5 to 16 mm.
blossoms
The flowers are single or in clusters of two to six flowers, from which occasionally pseudo spikes with leaves are formed. The flower stalks are mostly absent or not recognizable, only occasionally up to 15 mm long stalks are formed. The radial symmetry calyx is 3 to 9 mm long, the five calyx lobes are usually longer than the fused part of the calyx. The crown, which is also radially symmetrical, is bell-shaped to wheel-shaped and 6 to 13 mm long, its corolla lobes are short and wide and densely hairy on top.
The five stamens are of the same shape, protruding beyond the crown or not. The anthers consist of only one theka, this is crescent-shaped or kidney-shaped, 0.8 to 1 mm long. The stamens are occasionally bent inwards and about four times as long as the anthers. At their lower point of attachment they are thickened and densely hairy.
Fruits and seeds
The fruits are egg-shaped to elliptical or almost spherical, 3 to 8 mm long capsules , the septum-fold open and have four chambers. The seeds are 2.3 to 3.3 mm long, the embryo is straight, short and thick.
Other properties
The base chromosome number is . The plants mainly contain the alkaloids hyoscyamine or norhyoscyamine , as well as apoatropine and scopolamine . In the species Anthotroche walcottii and Anthotroche myoporoides , small amounts of an alkaloid called aponoratropin were also detected, which was the first evidence of this substance in nature.
Occurrence
The genus grows endemically in an area that includes the dry inland areas of southwestern Western Australia and extends partially to the west coast.
Systematics
The genus consists of only three species:
- Anthotroche myoporoides C. Gardener
- Anthotroche pannosa Endl.
- Anthotroche walcottii F. Muell.
The type species is Anthotroche pannosa .
literature
- Armando T. Hunziker: The Genera of Solanaceae . ARG Gantner Verlag KG, Ruggell, Liechtenstein 2001. ISBN 3-904144-77-4 .