Steve, The tree's you're describing sound intriguing. Your photo of var. depressa looks very much like the individuals I typically see. However, I have seen one site where individuals switch between that growth form, and an upright, narrowed crown form. I wonder if the difference could be a moisture supply issue with switching to an arborescent form if the have consistent soil moisture? In any case, I'm looking forward to hearing what I find out when you revisit the site.
Jess On Mon, Nov 16, 2009 at 6:17 PM, Steve Galehouse <[email protected]> wrote: > Jess- > > The area is a west facing clay slope with much slippage--I haven't been > there for 30 years, but the attached Google Earth image shows the area. As I > recall there are a number of disjunct prairie species there as well. The > spot is about an hour from home; I'll try to get there yet this Fall and > take some photos. > > Several references I have refer to Juniperus communis as native both in the > arborescent form as well as the shrubby depressa form (Braun's "Woody Plants > of Ohio", C.S. Sargent's "Manual of the Trees of North America", Britton & > Brown's "An Illustrated Flora of the Northern United States and Canada"), > although the arborescent form is usually mentioned as being rare and local. > I'm very familiar with depressa, and these aren't that. They also aren't > escaped individuals of Irish or Swedish Junipers, J. c. hibernica or > suecica, which were once used in ornamental plantings but have long ago > fallen out of favor. > > Steve > > On Mon, Nov 16, 2009 at 5:10 PM, Jess Riddle <[email protected]> wrote: >> >> Steve, >> >> Everything I've read says var. communis does not occur in N. America. >> The site where I've seen tree form also included the more typical >> shrub growth form. In fact, I saw one individual that had been >> growing as a shrub that sent up rapidly growing tree like sprout from >> one of the branches, so var. depressa can be very plastic. >> >> Are the Ohio sites with J. communis alvars? Sheperdia occurs with J. >> communis on alvars in New York. >> >> Jess >> >> On 11/16/09, Steve Galehouse <[email protected]> wrote: >> > Kouta, Jess, ENTS- >> > >> > There is a small population of Juniperus communis var. communis here in >> > N >> > Ohio, with individuals in the 15' to perhaps 20' range, growing with >> > Sheperdia canadensis, Buffalo-berry. I know of no local examples of J. >> > communis var. depressa, which is very common at our cabin in central >> > Ontario. >> > >> > Steve >> > >> > 2009/11/16 Kouta Räsänen <[email protected]> >> > >> > > Jess, >> > > >> > > And how tall is the tallest J. communis var. communis of which you are >> > > aware? Where is it growing? >> > > >> > > That 2000 year old juniper has been mentioned also by Jalas (1958) in >> > > Finnish. Though, I am little bit suspicious about that, too. I will >> > > search if I am able to find more about it. >> > > >> > > An addition to the language issue: My brother - a scientist in a >> > > finnish university - said to me that more than half of scientific >> > > papers in his department are published only in Finnish. And Finland is >> > > a highly developed country. The proportion is supposedly much lower in >> > > countries like Russia or China. >> > > >> > > >> > > >> > > >> > > - Kouta >> > > >> > > -- >> > > Eastern Native Tree Society >> > http://www.nativetreesociety.org >> > > Send email to [email protected] >> > > Visit this group at >> > http://groups.google.com/group/entstrees?hl=en >> > > To unsubscribe send email to >> > [email protected] >> > >> > >> > >> > -- >> > Eastern Native Tree Society >> > http://www.nativetreesociety.org >> > Send email to [email protected] >> > Visit this group at >> > http://groups.google.com/group/entstrees?hl=en >> > To unsubscribe send email to >> > [email protected] >> >> -- >> Eastern Native Tree Society http://www.nativetreesociety.org >> Send email to [email protected] >> Visit this group at http://groups.google.com/group/entstrees?hl=en >> To unsubscribe send email to [email protected] > > -- > Eastern Native Tree Society http://www.nativetreesociety.org > Send email to [email protected] > Visit this group at http://groups.google.com/group/entstrees?hl=en > To unsubscribe send email to [email protected] -- Eastern Native Tree Society http://www.nativetreesociety.org Send email to [email protected] Visit this group at http://groups.google.com/group/entstrees?hl=en To unsubscribe send email to [email protected]
