Asplenium septentrionale
Nordic Spleenwort ( Asplenium septentrionale )
Called The Nordic Spleenwort ( Asplenium septentrionale ), also Northern Spleenwort, a plant belonging to the family of Streifenfarngewächse is ( Aspleniaceae ).
Features
The Nordic Spleenwort is high to 15 cm. The fronds are long-petiolate, glabrous and shiny. They are two to fünfzählig composed unevenly forked. The individual blade sections are linear to ovate-lanceolate - wrong. They are often busy on both sides with one or two pfriemlichen to sharp teeth. The spores ripen from July to October.
Dissemination and locations
The Nordic Spleenwort grows on dry, sun-exposed rocks and walls. It occurs only on low lime or lime-free substrate. It rises up in the Alpine area.
He comes across Europe, North Africa, Asia before ( to the Himalayas and China) and in North America and Mexico. In Germany, it is scattered in the south, many extinct or lost in the middle and rarely in the north. In Austria it is often up scattered, died in Vienna, at risk in the Alpenvorländern and in the Pannonian area.
System
The Nordic Spleenwort was first published in 1753 by Carl Linnaeus in Species Plantarum septentrionale under the basionym Acrostichum. The epithet septentrionalis ( north ) is related to its position as the most northerly representative in the tropical - subtropical genus Acrostichum L. Georg Franz Hoffmann hired him in 1796 in the genus Asplenium.
The Nordic Spleenwort is divided into two subspecies:
- Asplenium septentrionale subsp. caucasicum Fraser - Jenk. & Lovis (syn. Asplenium caucasicum ( Fraser-Jenk. & Lovis ) Viane ): The fronds sections are wide only to 1.2 mm, while the midrib is also relatively narrow. The spores have an average length of 34 microns. This subspecies is diploid with a chromosome number of 2n = 72 She is from Georgia, Northeast Anatolia, Iran and Pakistan known.
- Asplenium septentrionale (L.) Hoffm. subsp. septentrionale: The fronds sections are 1 to 2 mm wide, their midrib is also relatively broad. The spores have a length of 35 to 45 microns. This subspecies is autotetraploid with a chromosome number of 2n = 144 It is widespread, their range corresponds to the entire article
There is also a hybrid between the two sub-species, Asplenium septentrionale nothosubsp. rehmanii Fraser - Jenk. (Syn. Asplenium × direi Viane & Reichstein ), the Asplenium septentrionale subsp. septentrionale very similar, but has aborted spores.
Trivial names
In the German-speaking area or have been for this species, some only regionally, also the other common names Harngras (Salzburg), Steinfarn (Salzburg), stone snake coercion and Small Wiederthon (Silesia ).