Diapensia
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Diapensia lapponica in Greenland |
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| Diapensia | ||||||||||||
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Diapensia is a plant kind from the family of Diapensiaceae . It includes four types .
description
Diapensia are compact, cushion-like shrubs, the stems are slender and heavily branched, the leaves are short-stalked and have entire margins. The flowers are solitary and terminal on small twigs or almost sessile, the inflorescence axes are elongated after flowering and of a flower-stem- like shape.
The calyx has two or three bracts at the base , the crown is bell-shaped, five-lobed and sloping after flowering. The stamens are fused at the base of the crown , the anthers are two-sided, staminodes are absent or are only rudimentary. The ovary is round and dreifächrig, the pen upright and filiform, the scar whole, provided with a head or weakly trilobed. The fruit is a tripartite capsule , elliptical to rounded, covered by the permanent calyx.
distribution
The genus has its center in the Himalayas. Diapensia lapponica , however, is indigenous to the circumboreal region and is also found in Europe.
Systematics
The genus Diapensia includes four species:
- Diapensia lapponica L.
- Diapensia wardii W.E. Evans : It occurs in southeastern Xizang at altitudes between 3200 and 3400 meters.
- Diapensia himalaica Hook. f. & Thomson : It occurs in Sikkim , Bhutan , Nepal , Myanmar , Yunnan and Xizang .
- Diapensia purpurea Diels : It occurs in Sichuan and Yunnan.
literature
- PJ Scott: Diapensiaceae. In: Klaus Kubitzki (Ed.): The Families and Genera of Vascular Plants . Volume 6: Flowering Plants, Dicotyledons: Celastrales, Oxalidales, Rosales, Cornales, Ericales . Springer, Berlin / Heidelberg / New York 2004, ISBN 3-540-06512-1 , pp. 117–121 (English, limited preview in Google Book Search).
- Haining Qin, Bruce Bartholomew: Diapensiaceae In: Flora of China 14: 235, online
Individual evidence
- ^ A b c Diapensia in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved October 6, 2017.
