The perennial plant is a dwarf shrub , the short stem is woody and branched and ends in leaf rosettes. The inflorescence axes reach a length of 10 to 15 centimeters, the inflorescences carry two to six yellow flowers . The sepals are 6 to 7 millimeters long, narrowly lanceolate and tapering to a point, the petals 10 to 16 millimeters long, inversely ovate or lanceolate. The capsule fruit is round and contains ten seeds, the number of chromosomes is 2n = 28.
Is pollinated Linum dolomiticum by insects, but self-pollination is possible and does happen. The seeds are spread by animals ( epizoochory ).
Distribution and habitat
Linum dolomiticum is a relic species and has only one location worldwide. It is located in Hungary , a little over 30 kilometers northwest of Budapest , near Pilisszentiván . The entire population of the species is located here on an area of ten hectares with only a thin substrate layer on limestone or dolomite near the Buda landscape protection area in Szénás.
The prevailing dolomite vegetation in the area of the species is characterized by a high level of biodiversity and some rare or endemic plant species in the Carpathian Basin. Here Linum dolomiticum grows together with Draba lasiocarpa var. Demissorum , the spherical devil's claw , Seseli leucospermum , Dianthus plumarius ssp. regis-stephani , Centaurea sadleriana , Vincetoxicum pannonicum and Sesleria sadleriana .
Status and exposure
There are around 1000 plants of this species at the site, the population is considered stable and there is no current threat. The site is protected, but accessible through a nature trail.
The first measures to protect the species were taken in 1934, and in 1951 the species was declared strictly protected. In 1979 it came under the Bern Convention . Since then, it has become part of numerous other protective measures, both nationally and internationally.
Despite their small area and the small stock, two forms are distinguished:
- Linum dolomiticum f. dolomiticum : petals 15 to 16 millimeters long and ovate
- Linum dolomiticum f. parviflorum : petals 10 to 12 millimeters long and lanceolate
- G. Vörösváry, L. Holly, L. Udvardy: Linum dolomiticum Borbás, a strictly protected wild relative of cultivated flax in Hungary . First International Conference on Crop Wild Relative Conservation and Use, 14. – 17. September 2005, Agrigento, Italy, Poster, PGR Forum crop wild relative case studies ( PDF Online ).