Veronica persica

Persian speedwell ( Veronica persica )

The Persian speedwell ( Veronica persica ) is a species in the family of the plantain family ( Plantaginaceae ). It is one of the most common in landscapes dominated by humans species of speedwell ( Veronica ).

Description

Vegetative characteristics

When the Persian speedwell is a one-year or annual wintering herbaceous plant. It is a relatively powerful plant which decumbent to ascending growing on the ground, however, is not rooted in their stems. The stems reach a length of between 10 cm and 40 cm. In the lower part of the stem, the leaves are opposite, arranged opposite one another at the top. The leaves are coarsely crenate, with a heart- shaped base, and are highly annoying network.

Generative features

The flowers of the Persian honor price, either singly in the leaf axils. The bracts are different from the lower stem leaves only the fact that they are smaller. The flowers are long -stalked. The hermaphrodite flowers have a diameter of 8 to 10 mm and are weakly zygomorphic. The sepals is ei - lanceolate. The crown is sky blue with wide white yellow throat and about 8 to 12 mm.

The most abundant, mehrsamigen capsule fruits are long stalks from the stem off about sticking their bracts far and are therefore usually quite conspicuous.

Ecology

The Persian speedwell is a Therophyt. Vegetative propagation is done by up to 40 cm long streamers.

The plant flowers from March to December, but can also bloom in mid-winter at appropriate temperatures. The flowers are vorweiblich. They bloom sometimes in the winter months and are pollinated by insects. Even self-pollination takes place.

The fruit stalks turn away from the light (they are negatively phototropic ) and grow in front of fruit ripening heavily in length. So they push the fruit capsules into the cracks of the substrate.

The seeds have a small Elaiosom and are spread by the black ant Lasius niger, next takes place Menschgenausbreitung eg about garden soil. Fruit ripening is from August / September to October.

Occurrence

Originally the Persian speedwell from the Caucasus. He was initially held in Europe only in botanical gardens. In the 19th century (probably 1805) he is then, allegedly from the Botanical Garden Karlsruhe, wild and has spread throughout Central Europe. Today it grows in all her congenial locations dominated by man-made landscapes.

One finds the Persian speedwell often in weed corridors, especially chopped fields, in vineyards and gardens, also in grain fields and along roads. It prefers open, nutrient-rich soils, like something warmer locations and is a Lehmzeiger.

After Ellenberg he is a fresh pointer, a weak acid to weak base pointer, grows on nitrogen-rich sites and is a nutrient -rich arable Ordnungscharakterart and Garden Beikrautfluren ( Polygono - Chenopodietalia ).