Diapensia lapponica
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Diapensia lapponica subsp. lapponica in Greenland |
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| Diapensia lapponica | ||||||||||||
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Diapensia lapponica is a plant type from the genus Diapensia in the family of Diapensiaceae .
description
Diapensia lapponica is an evergreen, dense lawn-forming herbaceous plant that grows up to 6 cm high. The leaves standing in groups are leathery, 5 to 10 mm long, inverted egg-shaped spatulate and rounded at the tip.
The inflorescence stalks are 5 to 40 mm long and usually carry a bract and two bracts. The latter are just below the flower . The calyx lobes are about 5 mm long and blunt. The petals are up to 10 mm long, are inversely ovate and white in color. The stamens have wide, flattened stamens .
The fruits are egg-shaped, about 4 mm long capsules .
The number of chromosomes is 2n = 12 for both subspecies.
Systematics
One can distinguish between two subspecies:
- Diapensia lapponica subsp. lapponica : It is found in northern Europe, Siberia, Greenland, Canada, and the northeastern United States.
- Diapensia lapponica subsp. obovata (F. Schmidt) Hultén (Syn .: Diapensia lapponica var. obovata F. Schmidt , Diapensia obovata (F. Schmidt) Nakai & Koidz. ): It comes in Siberia, the Far East Asian Russia, Japan, the Kuril Islands, on Sakhalin, Cheju , Alaska, and subarctic Canada.
Occurrence and locations
The species occurs in Europe in the Arctic and extends in the north in the Scottish mountains to a latitude of about 56 ° 40 'N, in Norway to about 60 ° N. It grows in crevices and on stony soils.
literature
- Thomas Gaskell Tutin et al. (Ed.): Flora Europaea, Volume 3: Diapensiaceae to Myoporaceae . Cambridge University Press, 1972. ISBN 978-0521084895 .
Individual evidence
- ^ Diapensia lapponica at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ A b Diapensia in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved October 6, 2017.
