Arabis hirsuta
Rough-haired Gänsekresse
The wire-haired cress ( Arabis hirsuta ) is a plant from the family of cruciferous plants ( Brassicaceae). As a German common names are also Rough and Hairy Rock Cress Cress in use.
- 4.1 Literature
- 4.2 Notes and references
Description
These two perennial herbaceous plant usually consists of several, 10 to 80 cm (rarely to 1 meter) tall, stiff upright stems. These grow from a basal rosette. The growing on the stem leaves and the narrow seedpods are on the stem. Both the stems and the leaves are densely covered with simple or forked hairs. Most toothed stem leaves are 10-30 cm long and comprise 0.5 to 1 mm long ears the stem or are sessile with a broad base. The leaf base is arrow-shaped to rounded.
The hermaphrodite, fourfold flowers are clustered at the stem ends. The white petals are between 3-7 mm long and about twice as long as the sepals. The flowering period is May to June. There shall be slim, cylindrical, 25-52 mm long pods. The narrow winged, oblong, about 1 × 1.5 mm large seeds are reddish-brown.
Ecology
The Hairy Rock Cress is a Therophyt or a Hemikryptophyt (including the two year old ).
The pollination of this kind, whose flowers contain both male and female organs, is via self - or insect pollination.
The distribution of this species is carried by wind propagation.
The chromosome number is n = 8, 16 or 32
Dissemination
The Hairy Rock Cress is fairly common in lime - poor grassland, in lean meadows, to Wegrainen and embankments, in bushes or seams in sparse pine forests, also halbruderal on trails or in bogs before. It prefers rather dry, mostly calcareous soil.
After Ellenberg she is a half-light plant, a default heat pointer and a Ordnungscharakterart subozeanischer dry and semi-dry grasslands ( Brometalia erecti ).
Ingredients
The seeds contain the mustard oil hirsutine.