Steve,

You're way ahead of me with branching patterns, but I don't know if
Betula nigra bark would flake in that way. Wouldn't you be able to see
a trace of the horizontal lenticels? Also, the tree may not be growing
straight because of soil erosion. It's on a bit of an incline - which
I didn't show very well since I didn't get the base of the trunk.

I added 3 pictures of the guy next door which I think is a big (to my
inexperienced eyes!) Betula lenta. Can you tell from the photo? It
could certainly be a river birch, though.

http://picasaweb.google.com/JennifDudley/TreeIDHelp?feat=directlink

Jenny

On Apr 3, 3:44 pm, Steve Galehouse <[email protected]> wrote:
> Jenny-
>
> After looking at your other photos more carefully--not focusing on the
> bark--I think the tree in your photo is a river birch, Betula nigra. The
> reasons I think it's not a hophornbeam are:
>
> 1-The branch attachment to the trunk. The tree in your photos displays sort
> of a "saddle" at the point of attachment, which is a characteristic of
> birches but not of Ostrya. Compare the attached photo to your photo #4.
>
> 2-Ostrya tends to be very vertical, straight, and single-stemmed; the
> general habit of your tree is arching and leaning, with a couple of main
> stems.
>
> Both species are found in similar habitats where native. River birch
> approaches its northern native limit in the NYC area(as it does here in NE
> Ohio), and the northern river birches look very different from the popular
> cultivars such as Heritage birch and Dura-heat birch, both of which have
> much lighter and more exfoliating bark. Either species can retain a few
> shriveled leaves over the winter.
>
> Steve
>
> On Fri, Apr 3, 2009 at 8:48 AM, JennyNYC <[email protected]> wrote:
>
> > Thanks! It sounds unanimous. Please send on any pix of hophornbeam.
> > Looking forward to one from Cleveland, Steve.
>
> > Jenny.
>
> > On Apr 3, 8:05 am, William Morse <[email protected]> wrote:
> > > i agree as well. those 'not typical' traits you've pointed out are all
> > > still within the variation found in the species.
>
> > > On Fri, Apr 3, 2009 at 7:35 AM, Will Fell <[email protected]> wrote:
>
> > > > Looks like a hop-hornbeam to me also. I've seen a some with flaky bark
> > > > and some with tighter bark, but the leaves hanging on is not unusual
> > > > for it.
>
> > > > On Apr 2, 11:29 pm, Steve Galehouse <[email protected]> wrote:
> > > >> Jenny-
>
> > > >> It looks sort of like hop-hornbeam, but not typical for the way it
> > looks in
> > > >> my area--the smaller trunk is more similar to what I've seen, the
> > larger
> > > >> more "flaky" (but hey, you're in NYC)! Tomorrow I'll take a pic and
> > send on
> > > >> to you what i think is typical(for Cleveland).
>
> > > >> Steve
>
> > > >> On Thu, Apr 2, 2009 at 10:13 PM, JennyNYC <[email protected]>
> > wrote:
>
> > > >> > ENTS,
>
> > > >> > Can you help me identify this tree? I am thinking it's a hophornbeam
> > > >> > (Ostrya virginiana), but do their leaves cling in winter?  It's
> > > >> > growing just above the Bronx River flood plain. I couldn't get a
> > close
> > > >> > look at the buds.
>
> > > >> >http://picasaweb.google.com/JennifDudley/TreeIDHelp?feat=directlink
>
> > > >> > Thanks!
> > > >> > Jenny- Hide quoted text -
>
> > > >> - Show quoted text -
>
>
>
>  Ostrya branching habit.jpg
> 189KViewDownload
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