On 16 Aug 2005 09:33:25 -0700, wrote:
I ran into alot of poison ivy. The three leaves I am certain is poison
ivy (three leaves per stem, powder covered stalk. 100% certain is
poison ivy.

Are the leaves opposite or alternate? Is the terminal leaflet stalked
or sessile. Where are you?


There are other where it 3 three leaves per stem on some of the smaller
branches, then goes to 3 leaves at end w/ two leaves below on per stem
larger branches. Powder on stalk until it gets to a trunk (with
vertical grain) about 3" diamater. 4' tall. Not certain what its.

Questions?
Can poison ivy have 5 leaves on more established branches?

Not any I've seen, and I've seen a lot of it. Wild guess is that you
may be seeing box elder seedlings, or perhaps Virginia creeper.

After my students all solemnly assured me that they knew poison ivy
well, and wouldn't walk in it, I'd take them out in the field. (I
don't pay a whole lot of attention to PI; I don't react
and because I do tend to avoid it anyhow) I'd walk them
into a bunch of box elder seedlings, then ask them what they were standing
in. Cruel, but it upped their watchfulness. g

More help he
http://www.conservation.state.mo.us/...e/flora/poivy/
http://www.floridaplants.com/Eflora/poisonivy.htm
http://www.rickveldman.com/poison/psnplants.htm
http://poisonivy.aesir.com/
http://waynesword.palomar.edu/ww0802.htm

Also, how does it spread? I noticed some in my yard far away from
source

Vegetatively and by dropped fruits or seeds.

Be sure you know what you're killing before you kill it... there are a
lot of look-alikes, quite harmless.