Urtica dioica

The Stinging nettle (Urtica dioica) is a species in the family of the nettle family (Urticaceae).

The Stinging nettle is a perennial, dioecious plant, plant height 30-300 cm reached. The upright, unbranched or branched stem is heavily wrinkled and has a diameter of 3-5 mm. Through its strong rhizomes and can spur them is growing up to large nests. In addition to the siliceous stinging hairs, it is also filled with short, gray hairs and bristles on the stems and petioles with downy hair.

The leaves are opposite, the petioles are usually less than a third as long as the heart-shaped, pointed blade. This is dull, dark green adaxially and abaxially hairy, 6-20 cm long and 2-13 cm broad. The leaf margin is serrate, rarely doubly serrate.

Flowering is from July to October. The linear-subulate stipules are free, the pedicel usually shorter than the inflorescence a panicle. The flowers are inconspicuous but somewhat greenish or brownish. The male flowers are erect, the perianth split up the middle, the corner at the base at the widest. The female flowers hang or are reflexed, the outer bracts linear to narrowly spatulate or lanceolate and 0.8 to 1.2 millimeters long, the inner bracts ovate to broadly ovate, 14 to 1.8 millimeters long and 1.1 to 1, 3 millimeters wide. The ovary is upper.

The fruit is a broad-ovate to ovate nut fruit, 1 to 1.3 (rarely to 1.4) mm long and 0.7 to 0.9 mm wide. The seeds have a TKM of 0.14 grams and are frost germinating

The Stinging nettle is anywhere in the Northern Hemisphere outside the tropics and arctic regions home.

The plant is a typical pointer and was replaced by nitrogen eutrophication and drainage of lowland forests, and especially in the woods Saumbereich often excessively promoted.

Source: http://de.wikipedia.org/wiki/Gro%C3%9Fe_Brennnessel
See Also: sending flowers, online florist