Asperula beckiana
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Asperula beckiana is a flowering plant in the family of the redness plants (Rubiaceae). It is native to the western mountains of the former Yugoslavia .
description
Appearance and leaf
Asperula beckiana grows as a more or less grass-forming, perennial herbaceous plant that reaches heights of 7 to 20 (rarely 5 to 30) centimeters. It has tap roots . The non-flowering plants are colored green. The weak stems are square and bare and consistently herbaceous. The internodes are very short in the lower stem area; the distance between the leaves in the middle area is shorter than or up to twice as long as the leaves .
The against-constant leaves together with the similar looking stipules four-leaf whorl . The basal foliage leaves standing in dense clusters have simple, ovate to obovate and hardly shiny leaf blades. The simple, with a length of 8 to 22 millimeters and a width of 0.8 to 2 millimeters, obscure-lanceolate to linear leaf blades of the stem leaves are either glabrous or warty with short hairs. The tip of the leaf is hyaline . The spreading edge is flat or only slightly rolled down. The veining of the leaves is characterized by a midrib, which usually reaches up to three quarters of the blade.
Inflorescence, flower and fruit
The sitting or up to 2 millimeter long inflorescence shafts and loose, umbrella-shaped partial inflorescences are in the axils of broadly lanceolate and more or less free bracts .
The hermaphroditic flowers are radial symmetry and four-fold. The chalice is either absent or reduced. The four pink-colored petals form the saucer-shaped to narrow funnel-shaped, outside bare and smooth crown with a length of 3 to 4 (rarely up to 4.5) millimeters. The corolla tube is about one to one and a half times as long as the corolla lobes. There is only one circle with four stamens . The stamens do not rise above the crown. Two carpels are one under constant, two-chambered, egg-shaped and papillary ovary grown, each ovary chamber only an ovule contains. The two-part stylus does not protrude beyond the crown with the scar .
Asperula beckiana forms dry, egg-shaped and papillae, disintegrating fruits of 1.5 to 2 millimeters in size, splitting into two partial fruits .
Chromosome number
The number of chromosomes is 2n = 20.
Possibility of confusion
Asperula beckiana is very similar to balding varieties of Asperula wettsteinii , which differ by a longer corolla tube.
Occurrence
Asperula beckiana is common in the western mountains of the former Yugoslavia as in Croatia . It colonizes bare and calcareous soils in the subalpine vegetation level .
Systematics
The first description of Asperula beckiana was carried out in 1908 by Arpad Degen in Magyar Botanikai Lapok , Volume VII, page 105th
Asperula beckiana belongs to the section Cynanchicae within the genus Asperula . It forms the " Asperula pyrenaica group" together with possibly related species with a disjoint area ( Asperula neglecta , Asperula neilreichii , Asperula rupicola and Asperula pyrenaica, which populate the mountain regions ) .
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literature
- Friedrich Ehrendorfer , Franz Krendl : Asperula. In: TG Tutin, VH Heywood, NA Burges, DM Moore, DH Valentine, SM Walters, DA Webb (eds.): Flora Europaea . Volume 4: Plantaginaceae to Compositae (and Rubiaceae) . Cambridge University Press, Cambridge 1976, ISBN 0-521-08717-1 , pp. 9 (English, limited preview in the Google book search - genus Asperula including key, section Cynanchicae (p. 4–6), Asperula pyrenaica group and Asperula beckiana itself (p. 9), from the unchanged reprint from 2010 ( ISBN 978 -0-521-15369-0 )).