Yes, moss LOVES tufa here too!
Calgary, Alberta, Canada - Zone 3
-30 C to +30 C (rarely!); elevation ~1130m; annual precipitation ~40 cm
Not exactly groundhugging but certainly small enough to be perfect for the trough or rock garden... Ulmus parvifolia 'Davidii'. It is amazingly dwarfed - the largest leaves I measured were 5mm in the largest dimension.
I'm not sure if these are hardy enough to survive here. (Unfortunately, I stupidly murdered both specimens that I tried on different occasions by planting them in conditions that were way too dry... the poor things did not even survive long enough to see if winter would kill them. :-\)
An extraordinary elm, Lori!I have never seen anything like it here.
Rogaland, Norway - with cool, often rainy summers (29C max) and mild, often rainy winters (180 cm/year)!
That Ulmus looks familiar--was that Wrightman's or Beavercreek? Cute little thing..
west central alberta, canada; just under 1000m; record temps:min -45C/-49F;max 34C/93F; http://picasaweb.google.ca/cactuscactus http://urbanehillbillycanada.blogspot.com/
Siskiyou Nursery, when it was run by Baldassare Mineo, carried several of these Ulmus parvifolias, from the tiny to the one I bought, which was supposed to be 7' after 10 years. I bought three and planted them, not knowing if they would be hardy. I'll try and find the pictures. They turned out to be irresistable to the antlered rats and two of them are bonsais as a result. They are the two planted farthest from the house. The one in a raised bed right next to the house is a nice size now and apparently hardy. It took the deer some years to start in on it and they changed the shape forever. It's probably 8' or 9' now. The one drawback to this lovely thing is that the density of the branches makes it very susceptible to damage from late ice storms.
7-10' is a very appealing size for 'trees' to me... do these ever make seed, Anne? Are they mutations of a larger species, or is this a naturally small species?
Cohan, I used to save old nursery catalogs and then ran out of room and tossed all but the most current. I recall that Ulmus parvifolia 'Seiju' was one of the ones offered but I seem to remember that it was a very small one. I thought that the one I bought was naturally small, but who knows? Phyllis Gustafson might remember because she may ahve been working at Siskiyou at the time. The attached pictures show the three trees I planted. First is a "bonsai" farthest from the house. Next one is a little closer, and the last is the one the deer left alone for some years. They trimmed off all the bottom branches and an ice storm late winter 2010 broke off most of the top half of the tree.
Sorry, picture #1 didn't make it. Attached is picture of "deer bonsai" planted farthest from the house. All three were planted in exactly the same soil and at the same time and size. Who would believe the results? (Anyone living in proximity to antlered rats would!)
Wow! I like them all, the shape of the biggest is lovely, but the smaller ones look great too, and the stature would be great in certain plantings..
As for antlered rats, I don't think we have anything like your issues, but deer and moose keep many things pruned around here--Sorbus/Mountain Ash is a challenge here, and note my comments in my Salix thread!
The one I showed, U. parvifolia 'Davidii' is said on the Wrightman's site to get to 40cm.