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  1. KTSmith

    Dawn Redwood Cone Production ?

    Greg, thanks for the call-out. I've attached the relevant pages from the USDA seed manual. Although the early western workers related cone production to tree height in native stands, tree age may indeed be a better predictor. Keep in mind, this species is monecious. Also, the mere presence of...
  2. KTSmith

    Hey Look at My Crud...

    The linden cross section is great in showing how little sapwood was supporting the vitality of the stem.
  3. KTSmith

    EAB in Non Ash Species?

    No, EAB has not jumped out of ash (Fraxinus). Indeed, the bonsai correspondent may well be seeing what they interpret as being "EAB effects". Native borers are out there. Also thousand-canker disease perhaps? Yes, I see ATH's post, I'd start with two-lined chestnut borer.
  4. KTSmith

    Ants repairing trees

    Thanks Tom for the Newsweek article. I've attached the original paper upon which the feature article was written. I'm not sure how freely available that article is. I haven't yet read it closely. I do know we live in a wondrous world!
  5. KTSmith

    Hemlock Cones - finally !

    A really impressive free resource is the USDA Woody Plant Seed Manual available here. Be aware, the hardcopy version is well over 1000 pages. Fortunately, the chapters are split out and may be downloaded individually. I've attached the section on hemlock (about 7 MB). Earlier chapters in the...
  6. KTSmith

    Looks like Dutch Elm Disease?

    I don't see anything convincing for DED. ATH's post shows the classic DED beetle vector galleries. As for the vascular (wood) discoloration, to see that usually requires actual splits or cross-sections, not just the appearance of outermost wood beneath the bark.
  7. KTSmith

    Looks like Dutch Elm Disease?

    Although there are foliar effects from DED on American and red elm (and other species in the genus), they are not diagnostic. Nothing in the photos contain unambiguous indicators of DED. There is a lot online from the various state extension services on DED, but you could start...
  8. KTSmith

    Beautiful spalting

    The photos are beautiful but inadequate for ID. Earlier this year, I coauthored (with Francis Schwarze, Hugh Morris, and others) a little research paper on spalting linked here. Lots of interest in the topic, I think I have a Zoom lecture on the topic in January, for the Maine Mycological...
  9. KTSmith

    Tough decisions

    Treevet: with the lawn agarics, I’d look at the stipe base, immersed in the thatch. If swollen and sac-like, I’d go with genus Amanita. Hard to tell otherwise. If that, toxic to eat but not damaging to lawn or trees. [later addition]: if the stipe base tapers to a rounded end, I’d start with...
  10. KTSmith

    Tough decisions

    Treevet: I’d start with that oak conk being an old Inonotus, probably I. dryadeus.
  11. KTSmith

    What if this stuff?

    With respect to the role of Irpex, you might like to check out: https://www.nrs.fs.fed.us/pubs/54267 Yes, shameless self-promotion.
  12. KTSmith

    What if this stuff?

    Don't feel bad Mr. Reach about the name. As with Serf Life, I was taught that lichen as Parmelia. Now, I'd probably add "in a broad sense" to that. The lichenologists have proposed a bunch of segregate genera for what we used to lump together as Parmelia. As of now, I don't know which is which!
  13. KTSmith

    Mysterious growth on cedars

    I think what's hanging me up here is the color rendering on my monitor. If it is indeed greenish, verify that is not a lichen. If not lichen and given the genus Thuja, I'd start with the decay fungus: Postia sericeomollis, which has had a bunch of different names with the synonymy given here...
  14. KTSmith

    Mysterious growth on cedars

    Tree species? Where in Canada? I don't mean street address, but a sense of midwest, eastcoast, westcoast. People call all sorts of trees "cedar". How about a close-up, in-focus image (or description) of the surface: What's the texture (smooth, rough, leathery, brittle)? Pores, teeth, gills...
  15. KTSmith

    Proper collar cut for vertical stem?

    You know Daniel, I think you are spot on here with the line clearing angle. I don't have one in reach, but I think that rule was in the "little yellow book" for line clearing. Apologies if I confused the issue further!
  16. KTSmith

    Proper collar cut for vertical stem?

    Indeed so, I've worked with both foresters and arborists for more than thirty years, even as an ISA member, but I am neither. I've always worked on the physiology of parasitism of plants and fungi. Some of my projects are more tree-based, or fungus-based, or disease interaction-based, depending...
  17. KTSmith

    Proper collar cut for vertical stem?

    True enough ATH, Shigo was a plant pathologist (officially for the FS ) and mycologist (which does not have a OPM occupation code). When we first met in 1977, Shigo's official FS business cards gave his title as "Chief Mycologist" (a position which actually did not exist). His graduate work in...
  18. KTSmith

    What kind of tree is this?

    Ha, Ha, well, perhaps it is indeed an obvious identification for folks in....suburban Tennessee? I say that with a smile because I doubt it's native to eastern US. I haven't placed it to plant family yet, but there are far better plantsmen on TB than me! Speak up, friends! Also, still no images...
  19. KTSmith

    What kind of tree is this?

    As a note to the OP: The image does not contain much in the way of identifying characteristics beyond very broad groups. If this is important to you, please provide in-focus close-up images of the branchlets plus images of anything cone-like.
  20. KTSmith

    Shigo book recommendations?

    Most of Alex Shigo's Forest Service research, including his informational stuff is freely available from the Forest Service Treesearch site. I see 33 publications there. Taking the OP at face value in wanting to know the science, The best starting point there is Shigo, 1984. Be aware that few...

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