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Mountain Avens or White Dryas (Dryas octopetala) is a alpine and arctic flowering plant in the Rosaceae. It is a small prostrate evergreen subshrub forming large colonies, and is a popular flower in rock gardens. The taxonomic name octopetala derives from the Greek octo (eight) and petalon (petal), referring to the eight petals of the flower, an unusual number in the Rosaceae, with five being the normal number. Image File history File links Mountainavens2. ...
Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ...
Divisions Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants Adiantum pedatum (a fern...
Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also called angiosperms) are a major group of land plants. ...
Orders see text Dicotyledons or dicots are flowering plants whose seed contains two embryonic leaves or cotyledons. ...
Families Barbeyaceae Cannabaceae (hemp family) Dirachmaceae Elaeagnaceae Moraceae (mulberry family) Rosaceae (rose family) Rhamnaceae (buckthorn family) Ulmaceae (elm family) Urticaceae (nettle family) For the Philippine municipality, see Rosales, Pangasinan. ...
Subfamilies Rosoideae Spiraeoideae Maloideae Amygdaloideae or Prunoideae The Rosaceae or rose family is a large family of plants, with about 3,000-4,000 species in 100-120 genera. ...
Dryas Categories: Plant stubs | Plants ...
In biology, binomial nomenclature is the formal method of naming species. ...
Carolus Linnaeus Carl Linnaeus, also known after his ennoblement as Carl von Linné ▶(?), and in English usually under the Latinized name Carolus Linnaeus (May 23, 1707 – January 10, 1778), was a Swedish botanist who laid the foundations for the modern scheme of taxonomy. ...
Classes Magnoliopsida - Dicots Liliopsida - Monocots The flowering plants (also called angiosperms) are a major group of land plants. ...
Subfamilies Rosoideae Spiraeoideae Maloideae Amygdaloideae or Prunoideae The Rosaceae or rose family is a large family of plants, with about 3,000-4,000 species in 100-120 genera. ...
A Silver Fir shoot showing three successive years of retained leaves In botany, an evergreen plant is a plant which retains its leaves year-round, with each leaf persisting for more than 12 months. ...
A subshrub (Latin suffrutex) is a horticultural rather than strictly botanical category of woody perennial plant, distinguished from a shrub by variously its ground-hugging stems and lower height, with overwintering perennial woody growth typically less than 10-20 cm tall, or by being only weakly woody and/or only...
A rock garden, also known as a rockery or an alpine garden, is a type of garden that features extensive use of rocks or stones, along with plants native to rocky or alpine environments. ...
A petal is one member or part of the corolla of a flower. ...
 Mountain Avens at Liefdefjorden, Spitsbergen It has a widespread occurrence throughout mountainous areas where it is generally restricted to limestone outcrops. It occurs in Great Britain in the Pennines (northern England), at two locations in Snowdonia (north Wales), and more widely in the Scottish Highlands; in Ireland it occurs on The Burren and a few other sites. It is widespread in Scandinavia, across northern Russia, and in North America from Alaska south to Colorado in the Rocky Mountains. Image File history File links Mountainavens3. ...
Image File history File links Mountainavens3. ...
Limey shale overlaid by limestone. ...
Typical Pennine scenery. ...
Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location within the UK Official language English de facto Capital London de facto Largest city London Area – Total Ranked 1st UK 130,395 km² Population – Total (mid-2004) – Total (2001 Census) – Density Ranked 1st UK 50. ...
See also Snowdonia National Park The north ridge of Tryfan (seen on the left in this picture) makes an enjoyable scramble in Snowdonia. ...
National motto: Cymru am byth (Welsh: Wales for ever) Waless location relative to the some of the British Isles (other parts of the UK shown on the map are in pink). ...
The Scottish Highlands are the mountainous regions of Scotland north and west of the Highland Boundary Fault. ...
A road winds down Corkscrew Hill towards Ballyvaughan. ...
The neutrality and factual accuracy of this article are disputed. ...
World map showing North America A satellite composite image of North America North America is a continent in the northern hemisphere bordered on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west by the...
Official language(s) English Capital Juneau Largest city Anchorage Area - Total - Width - Length - % water - Latitude - Longitude Ranked 1st 663,267 mi² / 1,717,854 km² 808 mi / 1,300 km 1,479 mi / 2,380 km 13. ...
Official language(s) English Capital Denver Largest city Denver Area - Total - Width - Length - % water - Latitude - Longitude Ranked 8th 269,837 km² 451 km 612 km 0. ...
White Goat Wilderness Area, Alberta, Canada The Rocky Mountains, often called the Rockies, are a broad mountain range in western North America. ...
The stems are woody, tortuose, with short, horizontal rooting branches. The leaves are glabrous above, densely white-tomentose beneath. The flowers are produced on stalks 3-10 cm long, and have eight creamy white petals. The style is persistent on the fruit with white feathery hairs, functioning as a wind-dispersal agent. In botany, a leaf is an above-ground plant organ specialized for photosynthesis. ...
Tomentose is a term in Entomology describing a taxonomic component which is covered in hairs. ...
Clivia miniata bears bright orange flowers. ...
Fruit stall in Barcelona, Catalonia. ...
It grows in dry localities where snow melts early, on gravel and rocky barrens, forming a distinct heath community on calcareous soils. Soil is unconsolidated rock particles mixed with organic matter from plant decay. ...
Climatology
The Younger Dryas and Elder Dryas stadials are named after Dryas octopetala, because of the great quantities of its pollen found in cores dating from those times. During these cold spells, Dryas octopetala was much more widely distributed than it is today, as large parts of the northern hemisphere that are now covered by forests were replaced in the cold periods by tundra. The Younger Dryas stadial, named after the alpine / tundra wildflower Dryas octopetala, and also referred to as the Big Freeze [1], was a brief cold climate period following the Bölling/Allerød interstadial at the end of the Pleistocene, and preceding the Preboreal of the early Holocene. ...
A stadial is a period of even-colder temperatures during an ice age. ...
SEM image of pollen grains from a variety of common plants: sunflower (Helianthus annuus), morning glory (Ipomea purpurea), hollyhock (Sildalcea malviflora), lily (Lilium auratum), primrose (Oenothera fruticosa), and castor bean (Ricinus communis). ...
Northern Hemisphere highlighted in yellow. ...
A dense growth of softwoods (a forest) in the Sierra Nevada Range of Northern California A forest is an area with a high density of trees (or, historically, a wooded area set aside for hunting). ...
In physical geography, tundra is an area where the tree growth is hindered by low temperatures and short growing seasons. ...
Image File history File links Download high resolution version (1600x1200, 208 KB)Dryas octopetala, showing flower and foliage, growing in Liechtenstein. ...
Image File history File links Download high resolution version (1600x1200, 208 KB)Dryas octopetala, showing flower and foliage, growing in Liechtenstein. ...
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