The Rose Family in Iceland, Part 3: Avens

Here are two gorgeous members of the Rosaceae found in Iceland.

20160620-_DSC0581

Dryas octopetala
mountain avens
Icelandic: holtasóley

 

Iceland’s national flower is the blossom of this low-growing evergreen shrub, which is found in arctic and sub-arctic regions around the world, and further south at higher elevations. It can be found almost everywhere in Iceland. In the US it can be found growing above tree line in the Cascades and Rocky Mountains (and in Alaska of course). An article by the USDA Forest Service mentions this species’ importance to paleoecologists (there are a lot of Dryas fossils lying about), and also how this plant has an interesting twist on heliotropism (plant movement in response to sunlight):

Most plants that have similar abilities do so to reduce the amount of solar radiation striking their flowers or leaves. In Dryas, the flowers do the opposite, moving to maximize the amount of sunlight reflecting off the petals and onto the mass of pistils at the center of the flower.

20160620-_DSC0593

 

Geum rivale
water avens
Icelandic: fjalldalafífill

 

Water avens is another circumpolar species, though it ranges much farther south than mountain avens. In North America it’s found in Greenland, Canada, and in the US, in New England, the upper Midwest, and as far south as New Mexico along the Rocky Mountains. BONAP shows it growing along a spine of the Appalachians in West Virginia. USDA Plants shows it present in Maryland but without county data, and it’s listed in Maryland Biodiversity Project but has no records. I’d guess there’s a small chance it could be found in the western parts of the state, since it’s been recorded on either side of Garret County in Pennsylvania and West Virginia.  In Iceland it’s found in the coastal areas and somewhat inland, but not in the south.
20160620-_DSC0597

mountain avens growing with Alchemilla glomerulans, Ranunculus species, and Equisetum species near Akureyri

20160620-_DSC0612

 

closeup:

 

It’s hard to describe how eye-catching these flowers are, with the red-purple sepals and salmon-pink petals and all those stamens poking out. I hope these pictures do it justice.

There are over 250 species of Geum worldwide, about 20 in the US, and about six in the state of Maryland, one of which, Geum canadense, is blooming now.

One thought on “The Rose Family in Iceland, Part 3: Avens

  1. Pingback: Rosaceous Wildflowers – the Rosaceae, part 3 | Elizabeth's Wildflower Blog

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s