https://gardenology.mywikis.net/w/index.php?action=history&feed=atom&title=Dryas_%28plant%29 2026-04-14T14:36:21Z Revision history for this page on the wiki MediaWiki 1.35.3 https://gardenology.mywikis.net/w/index.php?title=Dryas_(plant)&diff=3433&oldid=prev 2007-05-04T04:30:03Z

<p></p> <p><b>New page</b></p><div>{{Taxobox<br /> | color = lightgreen<br /> | name = ''Dryas''<br /> | image = Dryas drummondii6.jpg<br /> | image_width = 240px<br /> | image_caption = ''Dryas × suendermannii''<br /> | regnum = [[Plant]]ae<br /> | divisio = [[Magnoliophyta]]<br /> | classis = [[Magnoliopsida]]<br /> | ordo = [[Rosales]]<br /> | familia = [[Rosaceae]]<br /> | genus = '''''Dryas'''''<br /> | genus_authority = [[Carolus Linnaeus|L.]]<br /> | subdivision_ranks = Speciea<br /> | subdivision = See text<br /> }}<br /> <br /> '''''Dryas''''' is a genus of dwarf [[perennial]] [[herbaceous]] [[plant]]s in the [[rose]] family [[Rosaceae]], native to the [[arctic-alpine|arctic and alpine]] regions of [[Europe]], [[Asia]] and [[North America]]. The genus is named after the Greek nymph [[Dryas]].<br /> <br /> There are three [[species]] and one [[hybrid]]:<br /> *''[[Dryas drummondii]]'' – Drummond's Avens<br /> *''[[Dryas integrifolia]]'' – Entire-leaved Avens<br /> *''[[Dryas octopetala]]'' – Mountain Avens<br /> *''Dryas × suendermannii'' – ''D. drummondii'' × ''D. octopetala''<br /> <br /> The species are superficially similar to ''[[Geum]]'', ''[[Potentilla]]'' and [[strawberry|''Fragaria'']], but are distinct in having [[flower]]s with ''eight'' petals (rarely seven or up to ten), instead of the five petals found in most other genera in the Rosaceae. The flowers are erect and white with a yellow centre (''[[Dryas integrifolia]]'', ''[[Dryas octopetala]]'') or pendulous and all-yellow (''[[Dryas drummondii]]''), and held conspicuously above the small plants. The hybrid has pale yellow flowers. This makes them very popular in [[Rock garden|rockeries]] and [[alpine garden]]s.<br /> <br /> The classification of ''Dryas'' within the Rosaceae is presently unclear. The genus was originally placed in the subfamily [[Rosoideae]], and later in subfamily [[Dryadeae]] along with the genera ''[[Chamaebatia]]'', ''[[Purshia]]'' and ''[[Cercocarpus]]'', all four genera sharing [[root nodule]]s that host the [[nitrogen fixation|nitrogen-fixing]] [[bacterium]] ''[[Frankia]]''. However, recent genetic research indicates that Dryadeae may be paraphyletic, with ''Dryas'' not closely related to the other three genera.<br /> <br /> ==References==<br /> *[http://www.ars-grin.gov/cgi-bin/npgs/html/splist.pl?4000 Germplasm Resources Information Network: ''Dryas'']<br /> *Huxley, A. (1992). ''New RHS Dictionary of Gardening''. Macmillan [''D. × suendermannii''].<br /> <br /> [[Category:Rosaceae]]<br /> {{Rosales-stub}}</div>

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