Asperugo

Sharp herb ( Asperugo procumbens )

The focus herb ( Asperugo procumbens ), also called Schlangenäuglein, the only species of the genus within the family of Boraginaceae Asperugo is ( Boraginaceae ).

Description

Vegetative characteristics

The focus herb grows as a climbing to prostrate annual herbaceous plant. The aboveground plant parts are hairy rough. Of up to 90 cm long, usually unbranched stem is hollow and has five or six ribs. Of the distributed on the stem arranged, simple, deciduous leaves are the lower alternate, at the top, the leaves smaller and almost constantly to be. The leaf margin is serrated or smooth fine.

Generative features

The flowers appear singly or in groups in the leaf axils. There may be a short pedicel. The relatively small flowers are fünfzählig with double perianth. The five sepals are fused to below its center. The approximately 1.6 mm wide cup is somewhat regular basis fünfzipfelig and increases strongly up to 8 mm to fruit maturity, the sepals forming bidentate. The top five blue to violet, rarely white petals are fused Roehrig. The Corolla lobe are slightly unequal. The five scales are hump -like maw. The five stamens do not protrude like the style usually emerge from the corolla tube. The stamens are very short and the anthers are relatively short oblong with 0.6 mm. The 0.8 mm long stylus does not project beyond the corolla tube, ending in a capitate stigma.

The four sub- fruits of Klaus fruit are erect, narrowly ovate, nearly flat, compressed on both sides and about 3 mm in size. It flowers and bears fruit in central Europe from May to August in part from April to November.

The chromosome number is 2n = 48

Dissemination

Asperugo procumbens is widespread in Eurasia and North Africa. She is a neophyte in some areas of the world, for example in the United States. In German-speaking countries, the species is possibly native only in Austria.

In Austria the focus herb in the Pannonian region occurs scattered, otherwise rarely. The deposits extend to all states, in Upper Austria only fickle occurrences are known. In the area of ​​the Alps and the northern Alpine foreland, the species is considered endangered.

System

The valid first publication of the genus name Asperugo was in 1753 by Linnaeus in Species Plantarum, 1, p 138 with the only kind Asperugo procumbens L.. Asperugo The genus belongs to the tribe Asperugeaeae in the subfamily Boraginoideae within the family Boraginaceae.

Trivial names

In the German-speaking area or have been for this species, some only regionally, also the other common name of German occupation Wart ( Tübingen), Schlangenäuglein ( East Prussia ) and Devils Head (Hessen) related.