Rock plate
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Rock plate ( Ramonda myconi ) |
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The rock plate or Ramon diene ( Ramonda ) are a plant genus from the family of the Gesneriad (Gesneriaceae). It consists of only three species that are endemic to Spain and the Balkans, respectively. The occurrences in Europe are relics from the Tertiary ; almost all other species in the family are tropical. A special feature of the rock plate is the ability of poiklohydria , which is rare for higher plants . This allows the plants to dry out completely without dying.
description
Rock plates are perennial , herbaceous plants , almost stemless, the leaves stand in a rosette, are densely hairy, opposite, arranged in a circle and have sessile to short stalk, in the latter case the leaf stalk is winged. The leaf blades are ovate-spatulate to elliptical, blunt, roughly toothed to notched on the edge, wrinkled and covered with brown-red hairs on the underside.
The inflorescence is a raceme and sits on a long peduncle that arises from the leaf axils. Pre-leaves are missing. The flowers are usually five-fold, occasionally four-fold. The sepals, which do not fall off during the ripening period, are not overgrown, elongated-round to egg-shaped and just as long as the corolla tube. The wheel-shaped, almost radially symmetrical crown is flat in front, its tips are elliptical to obovate and blunt, their basic color is blue-purple, whitish towards the throat and provided with a yellow-orange ring in the center. The throat is covered with a group of single-celled hairs.
The five or four stamens (depending on the number of flowers) have short stamens and significantly larger, egg-shaped-triangular anthers with parallel, unconnected counters that open towards the end and form a cone. Nektarien missing, the ovary is ovate to conical, the pen slim and much longer than the anther cone, the scar is small. The fruit is a dry, elliptical to oblong-round capsule fruit and is significantly larger than the calyx.
distribution
The species of the genus can be found in the Pyrenees and on the Balkan Peninsula ; there they grow on shaded and damp rocks at altitudes of 500 to 2000 meters.
Systematics
Diagnostic features to differentiate the genus are the ungrown anthers and the fact that the corolla tube is significantly shorter than the corolla lobes.
The scientific generic name honors the French botanist Louis Ramond de Carbonnières (1755–1827), who contributed particularly to the floristic knowledge of the Pyrenees.
There are three types.
- Pyrenees rock plate ( Ramonda myconi (L.) Rchb. )
- Serbian rock plate ( Ramonda serbica Pančić & Petrovič )
- Nathalia rock plate ( Ramonda nathaliae Pančić )
use
All three species are used as ornamental plants for rock gardens and alpine houses. Ramonda myconi and Ramonda nathaliae form the rare hybrid Ramonda × regis-ferdinandi Kellerer in culture .
proof
- Fatima Sales, Ian C. Hedge: Ramonda Rich. In: Santiago Castroviejo, Jorge Paiva, Fátima Sales, Ian C. Hedge, Carlos Aedo, Juan José Aldasoro, Alberto Herrero, Mauricio Velayos (eds.): Flora Ibérica. Plantas Vasculares de la Península Ibérica e Islas Baleares. Vol. XIV. Myoporaceae - Campanulaceae . Real Jardín Botánico, CSIC, Madrid 2001, ISBN 84-00-06221-3 , p. 25–27 ( online [PDF]).
- Entry on the genus on The Genera of Gesneriaceae , online , last accessed on January 9, 2008
Individual evidence
- ↑ Mike F. Quartacci, Olivera Glišić, Branka Stevanović, Flavia Navari-Izzo: Plasma membrane lipids in the resurrection plant Ramonda serbica following dehydration and rehydration . In: Journal of Experimental Botany. Volume 53, No. 378, 2002, pp. 2159-2166, doi: 10.1093 / jxb / erf076 .
- ↑ Lotte Burkhardt: Directory of eponymous plant names . Extended Edition. Botanic Garden and Botanical Museum Berlin, Free University Berlin Berlin 2018. [1]
- ↑ Eckehart J. Jäger, Friedrich Ebel, Peter Hanelt, Gerd K. Müller (eds.): Exkursionsflora von Deutschland . Founded by Werner Rothmaler. tape 5 : Herbaceous ornamental and useful plants . Springer, Spektrum Akademischer Verlag, Berlin / Heidelberg 2008, ISBN 978-3-8274-0918-8 , pp. 481 .
