Colchicum autumnale

Autumn crocuses (Colchicum autumnale scientific name - Carl von Linné, 1753) is a small herbaceous plant from autumn showy pink-purple flowers in the family Colchicaceae.

Morphology

The Colchicum autumnale is a bulbous plant glabrous and whose height varies from 10 to 40 cm (minimum 5 cm). The organic form is bulbous geophytes (G bulb), which is a perennial herb that brings the buds in place underground. During the season, no adverse air bodies and the gems are found in bodies of groundwater as a bulb, storage organs that annually produce new stems, leaves and flowers.

Roots


The roots are fibrous (type file) and leave the sides by a bulb-oblong tuber (pyriform or ellipsoid) located deeply in the soil (10-15 cm). In reality it is more precisely a tuber that has a solid consistency wrapped in dried tunics brownish color (the remains of tubers in previous years). Below, one of its sides is a characteristic extension.

This tuber in late summer (or early autumn) form from the flower bud which then will form the flower itself, leaving the following spring is mandated to give the leaves the fruit at the same time will form a new tuber from a basal internode. Tuber size: diameter 3 cm, height 4-7 cm.

Frame

The stem is virtually absent: the leaves and flowers grow directly from the root tuber (tuber can be considered part of the underground stem).

Leaves

The leaves are radical, embracing and erect. The insertion of the leaf in the tuber is coiled and tiles. The shape is lanceolate-acute undulating gait with numerous nerves arranged lengthwise and then parallel to the leaf. The color is bright green on both sides and the texture is quite meaty. The large leaves are large 4-7 cm long and 15 to 26 cm (ie 3 to 5 times longer than wide).

Inflorescence

The inflorescence is normally formed from a single large flower at the base with a long piece of thin tube apex expands into six segments. Other flowers (up to 7 - normally 1 to 3) can sprout from the same bulb but at different times. This inflorescence is devoid of leaves (which sprout the following spring).

The tube is always white (almost colorless) color perigonium independent, while the shape of the flower is that of a narrow elongated cup soon fades and opens like a fan. At the base of the flower is a hyaline spathe (the papery), mucronata, whose margins are widened in membranous wings and wraps the flower 1-3 cm. Length of pipe perigonium: 10 to 20 cm.

Flowers

The flowers are hermaphrodite, actinomorphic, penta-cyclic (ie consist of five overlapping whorls: perigonium with two whorls of three tepals each, androecium with two whorls of stamens each in the most central and the last whorl, the harem), trimers (each whorl consists of three elements). Width of the flower 30 to 80 mm.




Source: http://it.wikipedia.org/wiki/Colchicum_autumnale



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