Southeastern arum
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Southeastern arum ( Arum cylindraceum ) |
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The south-eastern arum ( Arum cylindraceum ) is a species of the genus arum ( Arum ) in the arum family (Araceae).
description
The southeastern arum is a perennial herbaceous plant that reaches heights of 15 to 40 centimeters. This geophyte forms a horizontal and disc-shaped tuber as a permanent organ . Short adventitious shoots emerge from this, which occasionally develop into independent plants, so that clump-shaped colonies develop. The stem becomes almost as long or longer than the leaf stalks. The leaf blade never shows spots.
The odorless inflorescence consists of spathe and cobs . The spathe is light green, 8 to 18 inches long and 1.5 to 2 times as long as the piston. The length of the upper spread part is 1.5-3 times that of the lower closed one. On the inside of the lower, tubular section, at the level of the male flowers, there is a purple-red transverse band. The appendage of the flask is thin, worm-shaped, slightly to moderately clubbed, light chocolate brown to dark purple and measures 30 to 50 × 2.5 to 4 millimeters. The flowerless areas of the piston between male and somewhat stiff, sterile flowers are smooth. The anthers are mostly purple-purple.
The flowering period extends from April to May.
The number of chromosomes is 2n = 28.
Occurrence
The south-east arum is a floral element of the submeridional to temperate zone of south-east Europe. It occurs from Europe to northwestern Turkey and Cyprus. It occurs in Portugal, Spain, Corsica, Germany, Denmark, Sweden, the Czech Republic, Poland, Hungary, Austria, Switzerland, Italy, Sicily, in the former Yugoslavia, Bulgaria, Greece, Crete, Romania, in the European and Asian Turkey and in Cyprus. In Germany the species occurs only in Hamburg. In Austria, the species is often found in fresh to moist, very nutrient-rich deciduous forests in Vienna, Lower Austria and Burgenland (obviously only east of the Erlauf).
Systematics
Synonyms for Arum cylindraceum are Arum alpinum Schott & Kotschy and Arum orientale M.Bieb. subsp. danicum (Prime) Prime .
In 2011 the subspecies Arum cylindraceum subsp. pitsyllianum Hadjik., Hand & G.Mans. described. It is endemic to Cyprus. Differences to the nominate form are: the tubular part of the spathe is whitish to greenish white and has a pale pink, horizontal transverse band just above the base. The piston is orange to orange-pink. The anthers are orange. The flowering period extends from May to early June. The number of chromosomes for this subspecies is 2n = 28.
supporting documents
- Ralf Jahn, Peter Schönfelder: Excursion flora for Crete . With contributions by Alfred Mayer and Martin Scheuerer. Eugen Ulmer, Stuttgart (Hohenheim) 1995, ISBN 3-8001-3478-0 , p. 409 .
- Eckehart J. Jäger, Klaus Werner (Ed.): Excursion flora from Germany . Founded by Werner Rothmaler. 10th edited edition. tape 4 : Vascular Plants: Critical Volume . Elsevier, Spektrum Akademischer Verlag, Munich / Heidelberg 2005, ISBN 3-8274-1496-2 , p. 931 .
Individual evidence
- ↑ a b Rafaël Govaerts (Ed.): Arum. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved June 12, 2018.
- ↑ Botanik im Bild / Flora von Österreich, Arum cylindraceum.
- ↑ Georgios Hadjikyriakou: Arum cylindraceum subsp. pitsyllianum (Araceae), a New Taxon from Cyprus . In: Novon: A Journal for Botanical Nomenclature. Volume 21, No. 4, 2011, pp. 431-436, doi: 10.3417 / 2011007 , BHL .
further reading
- Marija Bedalov, Walter Gutermann: The genus Arum in the Eastern Alps countries. In: Stapfia. Volume 10, Linz 1982, pp. 95-97, PDF on ZOBODAT (with distribution map for Austria).
