Primula denticulata

Ball Primrose ( Primula denticulata )

The ball Primrose (Primula denticulata ) is a plant of the genus Primula (Primula ). It is native to Asia.

• 4.1 Literature

Description

Vegetative characteristics

The ball - primrose grows as a perennial herbaceous plant that reaches heights of growth to 30 centimeters.

The arranged in a basal rosette of leaves have a broad winged petiole, the indistinctly demarcated from the leaf blade to nearly as long as the leaf blade is. The simple, oblong or lanceolate leaf blade has initially runs a length of 3 to 15 cm and extended to fruit maturity at a length of up to 20 cm and a width of usually 1.5 to 4 cm. The Spreitenbasis narrows the petiole towards the upper end is rounded or blunt, and the blade edge is serrated. The lower leaf surface is pubescent along the veins or almost bare and sometimes white for fruit ripening or floured yellow. The upper leaf surface is pubescent or glabrous.

Generative features

The fluffy haired or bald inflorescence stem during the flowering period from 5 to 30 cm high and is extended to fruit maturity up to 45 cm; the upper half can be floured. The spherical, kopfige, doldige inflorescence contains many flowers. The many overlapping at their base bracts are lanceolate and slightly arched at a length of 5 to 10 mm. The flower stalk has a length of 1 to 5 mm.

The hermaphrodite flowers are radial symmetry and fünfzählig double perianth. The Endblüten the inflorescence open and are fertile. The five 5 to 10 mm long sepals are up more than half of their length grown narrow bell-shaped. The five often tinted purple calyx teeth are oblong - lanceolate and floured or possess tiny glands and are ciliated. The five pink - purple, purple to blue or rarely white petals are fused into a 0.8 to 1.2 cm long corolla tube. The Kronschlund having a diameter 1 to 2 cm and a yellow eye. The five inverted egg-shaped Kronlappen are deeply emarginate. The ovary is upper constant. There is heterostyly. It is only the inner circle, usually with five stamens present. There are approximately equal numbers of individuals with 1.5 to 2 mm long stylus and about 6 mm above the base of the corolla tube inserted stamens, as such a long time of 6 to 7 mm pen and about 3 mm above the base of the corolla tube inserted stamens.

The flowering period extends from March to April. Pollination is by insects ( entomophily ).

The almost spherical capsule fruit is shorter than the calyx and contains many seeds.

Occurrence

The ball - primrose is native to Afghanistan in the Hindu Kush, and in North Pakistan, Nepal, Sikkim, Bhutan, southeastern Tibet, Yunnan, Sichuan, Guizhou and northern Myanmar. In China, it occurs on wet, sparse locations at altitudes 1500-4100 meters.

Use

The Kugelprimel 's culture since at least 1838. It is used as an ornamental plant in rock gardens, perennial beds and groups of trees. There are numerous varieties, such as 'Alba ', ' Blue Select', ' dark colors ' or 'Ruby '.

Swell

• Qiming Hu & Sylvia Kelso: Primulaceae. In: Wu Zheng - Yi & Peter H. Raven (eds.): Flora of China. Myrsinaceae through Loganiaceae. 15, Science Press and Missouri Botanical Garden Press, Beijing and St. Louis in 1996, ISBN ISBN 0-915279-37-1, Primula denticulata, S. 122 (text identical with printed work, Primula denticulata - Online). (Section Description and dissemination )