brachypro's picture

Unidentified broad leaf tree

Observed: 18th October 2012 By: brachyprobrachypro’s reputation in Plantsbrachypro’s reputation in Plants
leaf
bud
bark
tree
Description:

Toothed lobed leaf 20cm long

Identifications
Species interactions

No interactions present.

Species with which red oak (Quercus rubra agg.) interacts

Comments

brachypro's picture

Thanks

Thanks for the rapid ID. I was able to send the students away with a possible ID. Was using an online key to ID leaves students found in the school grounds. This was not on it. Been out after class and got some more pictures if it helps.

Molecular Biologist and Biology Teacher but only an amateur Naturalist.

lavateraguy's picture

ID

The university library probably has a copy of Mitchell (Collins' A Field Guide to the Trees of Britain and Northern Europe) or Sterry (Collins Complete British Trees). If you take one of those with you - in this case preferably the former - you can probably puzzle it out.

There are 4 species of red oak - Quercus velutina, Quercus coccinea, Quercus palustris and Quercus rubra (aka Quercus borealis), with a tendency to produce good red autumn colours. Leaf shape is variable, and hence it is difficult to distinguish them by that feature.

The bark in this case seems to match the description of Quercus palustris (in Mitchell) better. Sterry has bark photos, and none is an exact match.

MrG's picture

Red Oak

This is actually Red Oak (Q. rubra). Q. palustris and Q. coccinea have smaller glossier leaves. Q. velutina is only likely to be found in a collection.