Oxytropis podocarpa, Inflated oxytrope

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Hoy
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Joined: 2009-12-15

My Dryas octopetala stays green all winter if it is not to much frost. However, the leaves don't get older than one year anyway and dies during summer when the new growth "take off". Almost all the leaves of the plant I have at my mountain cabin die during winter but the plant sits very exposed.

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

cohan
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Joined: 2011-02-03

I suppose at some point, wetter meadows would also give too much competition for O podocarpa? Just rank speculation...

We may need to have the Dryas sub-thread excised soon...lol.. Rick- I haven't seen the same plants at enough different seasons to comment on their cycle, (I have D drummondii growing here, but it really just took off in the last year or so, so no matting yet) but will say that the large colonies of them in this and other sites, at this early time in the year were decidedly crunchy, and while I did not look at them with an eye to checking age of leaves, I don't think all the leaves present could be new at this time of year, probably the previous year's growth.. As Lori points out, they don't all look fresh enough, and I think its just too early at this site..
A couple more shots, the first I assume is Dryas drummondii, the other is a mixed mat with deciduous Arctosatphylos rubra (the lovely bright green over to the right) just emerging and another semi-evergreen, A uva-ursi with some brown leaves at upper left,  with presumably D drummondii to the right and probably D  octopetala (it seems likely that drummondii, octopetala and integrifolia all occur at this site, but I'm even less sure of them than Lori ;) There are definitely too many leaves on them to be all new at this early date..

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

cohan
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Joined: 2011-02-03

BTW- I hadn't thought about it before, but I guess summer leaf die off is reasonable enough- that's how our other local evergreens do it-- Pyrolas et al..

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

Lori S.
Title: Moderator
Joined: 2009-10-27

Very interesting.  I only grow D. octopetala and haven't noticed any leaf die-off during the summer, but I'll try to remember to pay attention this summer.  Haven't noticed it in the wild either, but the season is so short anyway that perhaps it occurs more during the winter.

cohan wrote:

I suppose at some point, wetter meadows would also give too much competition for O podocarpa? Just rank speculation...

I'd tend to think it's more that it requires drainage... I don't see any of the peas growing in the wet alpine meadows.

Lori
Calgary, Alberta, Canada - Zone 3
-30 C to +30 C (rarely!); elevation ~1130m; annual precipitation ~40 cm

cohan
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Joined: 2011-02-03

Lori wrote:

cohan wrote:

I suppose at some point, wetter meadows would also give too much competition for O podocarpa? Just rank speculation...

I'd tend to think it's more that it requires drainage... I don't see any of the peas growing in the wet alpine meadows.

Could well be.. I have not tended to think of any part of the Columbia Icefield ('tourist' area near the foot of the Athabasca Glacier) as being dry, never seems to be far from snowing there.. but I don't think I've ever been in mid-summer, need to check back in the files and see.. and of course I also did not actually check soil moisture, so at times I might have been confusing cold (always) with moist!

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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