Kouta, Marc, ENTS- The problem with taxonomy is often it doesn't make sense--the genera Malus, Pyrus, and Aronia can interbreed, as can Kalmia and Rhododendron, but the series within the oaks, Erythrobalanus and Lepidobalanus, cannot, nor can different series of maples--it doesn't make sense to have species within a genus more biologically separated than those between two genera. Time for cladistics, I guess.
Steve 2009/11/20 Kouta Räsänen <[email protected]> > Marc & Steve, > > GRIN considers they still separate species: > > http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?9690 > > (I am not claiming it's better to place them species than variety.) > > - Kouta > > On 20 marras, 22:41, Steve Galehouse <[email protected]> wrote: > > ENTS_ > > > > There has always been a lot of speculation, and contention, within the > field > > of taxonomy. It was once thought Cyprus cedar, *Cedrus brevifolia*, was > a > > separate species, but that is now included as a variety or race of *C. > > libani* as well---some authors even include Deodar as a variety of *C. > > libani*. Closer to home, some authors consider Fraser fir a sub. of > balsam > > fir, pond cypress a sub of bald cypress, and Canada yew a sub. of English > > yew. > > > > Steve > > > > On Fri, Nov 20, 2009 at 2:29 PM, Marcboston <[email protected] > >wrote: > > > > > Not to complicate things but it is my understanding that Cedrus > > > atlantica has been lumped into the species libani. The "atlantica" > > > form is now classified as a variety/sub-species of Cedrus libani at > > > least in the nursery trade. > > > > > On Nov 20, 9:45 am, Kouta Räsänen <[email protected]> wrote: > > > > Jenny, Steve et al., > > > > > > I guess Steve has right: rather Cedar of Lebanon than Atlas Cedar > > > > because of flat-topped crown. > > > > > > There are a lot of similarities between European and your vegetation. > > > > Considering trees, there are even shared native species, like > > > > Juniperus communis and Alnus incana. Many species pairs are very > > > > similar, like Betula pendula - B. papyrifera, Ulmus laevis - U. > > > > americana, Populus tremula - P. tremuloides, Populus nigra - P. > > > > deltoides etc. > > > > > > > for some reason they are often the ones that are out of favor back > in > > > North > > > > > Ameica: silver maple, box-elder, and black locust as examples. > > > > > > That's true. I think one reason is that there are not similar species > > > > in European nature: no maples with silvery leaf underside, no maples > > > > with compoud leaves and no large fabaceous trees. The gardeners like > > > > trees they don't see everywhere in the bush. In addition, the locust > > > > borer is absent in Europe, and consequently Black Locust is very > vital > > > > here - even too vital: in southern Europe it has become one of the > > > > most common tree species. > > > > > > - Kouta > > > > > -- > > > Eastern Native Tree Societyhttp://www.nativetreesociety.org > > > Send email to [email protected] > > > Visit this group athttp://groups.google.com/group/entstrees?hl=en > > > To unsubscribe send email to > > > [email protected]<entstrees%[email protected]> > <entstrees%[email protected]<entstrees%[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]<entstrees%[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]
