Acanthoprasium frutescens
| Acanthoprasium frutescens | ||||||||||||
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| Acanthoprasium frutescens | ||||||||||||
| ( L. ) Spenn. |
Acanthoprasium frutescens is a plant of the genus Acanthoprasium within the family Lamiaceae (Labiatae). It is endemic to the Maritime Alps .
description
Acanthoprasium frutescens is a small, branched shrub that reaches heights of up to 60 cm. Its branches are square to almost round in cross-section. The opposite leaves are short stalked. The leaf blade is ovate to rhombic with one to four coarse teeth on each side. The lower leaves consist of a 5 to 6 mm long petiole and a 15 to 25 mm long and 10 to 20 mm wide leaf blade.
The flowers stand in pairs to six in a whorl or at the tip of the branches. The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . At each node (four wound dry located) cover sheets (Brakteolen) are straightened and formed into spikes; they are white, glabrous and 7 to 10 mm long. The calyx is 12 to 15 mm long, bell-shaped, slightly enlarged at the throat and has 5 to 10 wide triangular aurled teeth. The corolla tube does not rise above the chalice. The five white or purple petals are fused to form a 12 to 15 mm long tube. The crown ends with two lips. Her upper lip is capped with long white hair.
The flowering period is between May and July.
Occurrence
Acanthoprasium frutescens is endemic to the Maritime Alps of France and Italy. It thrives on rocks.
Taxonomy
A synonym of Acanthoprasium frutescens (L.) Spenn. is Ballota frutescens (L.) Woods . Even George Bentham had in 1834 this type in its own section: Ballota sect. Acanthoprasium placed within the genus Ballota . But as early as 1843, the Baden botanist Fridolin Karl Leopold Spenner was of the opinion that this species belonged to a genus of its own called Acanthoprasium . That has recently been confirmed.
literature
- Alois Walter Patzak : Ballota L. In: Thomas Gaskell Tutin u. a .: Flora Europaea . Volume 3, pp. 149-151. Cambridge University Press 1972.
- Hippolyte Jacques Coste : Flore descriptive et illustrée de la France . 3 volumes. Paris 1900-1906.
- John Isaac Briquet : Les Labiées des Alpes Maritimes, Matériaux pour servir à l'Histoire de la Flore des Alpes Maritimes . Genève, 1891–1895, 3 volumes.
Individual evidence
- ↑ Rafaël Govaerts (Ed.): Acanthoprasium. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved September 10, 2019.
- ↑ Mika Bendiksby, Lisbeth Thorbek, Anne-Cathrine Scheen, Charlotte Lindqvist, Olof Ryding: An updated phylogeny and classification of Lamiaceae subfamily Lamioideae . In: Taxon . tape 60 , no. 2 , 2011, p. 471-484 ( abstract ). Abstract ( Memento of the original from May 26, 2015 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
