Dryas octopetala

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IMYoung
Title: Member
Joined: 2010-01-31

Wonderful photos of this iconic plant for all SRGC members .....
your pictures show why it makes such a popular logo for us!

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;D

Ian  and/or Margaret Young ( -here it is usually Margaret)

Aberdeen , North East Scotland, UK
Zone 8a

www.srgc.net

cohan
cohan's picture
Title: Guest
Joined: 2011-02-03

A few views from the area near the foot of the Athabasca Glacier, on the Icefileds Parkway in Alberta. There are large areas of Dryas here- octopetala and drummondii- integrifolia as well, I think, though in some I am not sure whether they are clear species or crosses;  This was one of the few times (only?) I was there at the right time to catch these in flower- this from June 26, 2010.
Looking more closely now, I see some of the leaves slightly recurved- is this normal variation for octopetala, or could it suggest crossing with integrifolia? If anyone feels any of these are integrifolia, let me know and I'll move them ;) I've saved some pics that seem more clearly to be integrifolia for the new topic I started for that species..

west central alberta, canada; just under 1000m; record temps:min -45C/-49F;max 34C/93F; http://picasaweb.google.ca/cactuscactus  http://urbanehillbillycanada.blogspot.com/

RickR
Title: Moderator
Joined: 2009-09-21

Lori's quote from Flora of Alberta reads that D. octopetala has "somewhat revolute" leaf margins.  So I would think that questioning its species status would not be a concern. 

Is it common to have such multi-petaled flowers?  Really pretty - enough to make them stand out and enhance their beauty without taking too much away from simplicity, yet not enough to scream out man made hybrid.

Rick Rodich    zone 4a.    Annual precipitation ~24 inches
near Minneapolis, Minnesota, USA

cohan
cohan's picture
Title: Guest
Joined: 2011-02-03

Rick, I mostly questioned the species since other plants looking more or less like integrifolia could be growing right beside these more octopetala types.. no doubt some of them must be hybrids :)

I don't have wide enough experience to know how common the multipetalled flowers are.. they didn't strike me at the time as being unusual, just part of a variably flowered population (of a couple of species and hybrids...lol)..

west central alberta, canada; just under 1000m; record temps:min -45C/-49F;max 34C/93F; http://picasaweb.google.ca/cactuscactus  http://urbanehillbillycanada.blogspot.com/

Hoy
Hoy's picture
Title: Member
Joined: 2009-12-15

I can't say whether they're hybrids or not but the mulipetalled form is highly uncommon - in fact I have never seen any with much more than 8! So probably they are hybrids?
The form of the petals differ, however, as shown here: (Dryas octopetala)

Trond
Rogaland, Norway - with cool, often rainy summers  (29C max) and mild, often rainy winters (180 cm/year)!

cohan
cohan's picture
Title: Guest
Joined: 2011-02-03

I think at the time I took those photos I wasn't even thinking about the two species and the possibility of hybrids, so I didn't take the kind of photographs that would highlight the important characters - maybe another time!
Here's another shot from a different site- very different kind of habitat! Lower in elevation, below the treeline though still not by a lot; This plant is in a wooded area, on nearly bare rock next to a stream/waterfall..  It's just behind a popular roadside stop where you can look back on the highway where it has just climbed up/down from the river valley below to near the treeline... We stopped there this year at the end of May, and this shaded area still had some deep snow banks...

west central alberta, canada; just under 1000m; record temps:min -45C/-49F;max 34C/93F; http://picasaweb.google.ca/cactuscactus  http://urbanehillbillycanada.blogspot.com/

Weiser
Title: Member
Joined: 2009-12-04

I can keep D. octopetala alive and spreading in Reno as long as it gets watered regularly. It seems to take the heat pretty well in that the year old leaves shrivel and dry while the new leaves stay nice. I never get many flowers however maybe four or five on a one foot square mat.

Do you think that I don't get cold enough in the winter to set buds?

From the High Desert Steppe
of the Great Basin and the Eastern
Escarpment of the Sierra Nevada Range
Located in Reno/Sparks,NV  zone 6-7
http://www.flickr.com/photos/sierrarainshadow/
John P Weiser

Hoy
Hoy's picture
Title: Member
Joined: 2009-12-15

I have grown it (or maybe it was the cross x sundermannii) at home where it flowered every spring and my winters are not cold. I have also seen beautiful colonies at the sea level in southern Norway (in northern Norway all kind of alpines grow down to sea level). The plants in south don't get too much cold (they are relicts from the last glaciation and are far from the mountains).

Trond
Rogaland, Norway - with cool, often rainy summers  (29C max) and mild, often rainy winters (180 cm/year)!

cohan
cohan's picture
Title: Guest
Joined: 2011-02-03

Can't help with that, John- I haven't grown it yet myself, and of course when I do, it won't have any problem with lack of cold!
I do also wonder, though, if there is simply variability in number of flowers per plant? Some of those I photographed had quite  a few flowers, others not so many.. I haven't seen enough of them in different places in flower to really know, though...

west central alberta, canada; just under 1000m; record temps:min -45C/-49F;max 34C/93F; http://picasaweb.google.ca/cactuscactus  http://urbanehillbillycanada.blogspot.com/

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