Aesculus spp, gymnocladus dioicus (?), carya spp, maybe nyssa sylvatica. I'll edit if I think of more. - juniperus virginiana can be

Did you want only natives in your list?

This post was edited by j0nd03 on Wed, Jul 3, 13 at 14:34

There have discussions on this subject before.......it is pretty difficult to make any sort of generalities on this topic as different growing conditions can have significant bearing.

Here is a link that might be useful: previous 'root depth' thread

Funny, because that Don guy re clarified his question almost to the exact same way I was going to.

Yes depth is probably not the right question.

So I'll clarify, which SPECIES do not have fibrous root systems.

The link to the post above rattles off but a few that do have fibrous roots systems.

Is it possible to rank these plants as having few, moderate or extreme fibrous roots?

Feel free to add more genus or species. I apologize for the mix of common and botanical names. I put in my ranking based on my experience.

Baldcypress - Moderate
River Birch - Extreme
Butternut
Catalpa
Malus - Moderate
Cornus kousa - Few to moderate
American Hornbeam -Few to moderate
Horsechestnut - Few
Buckeye - Few
Ironwood - Few
American Linden - Few
Amur Maackia - Few
Pin Oak
Northern Pin Oak
White Oak
Red Oak
Swamp Oak
Eastern Redbud
Dawn Redwood - Moderate
Sassafras
Serviceberry
Sweetgum
Sycamore
Tuliptree - Moderate
Tupelo
Yellowwood - Few to moderate
Sugar Maple - Few to moderate
Silver Maple - Extreme
Red Maple
Boxelder - Few to moderate
Cottonwood - Few to moderate
Kentucky Coffee Tree - Few
Turkish Hazelnut
Norway Maple - Extreme
Shatung Maple - Moderate
Paperbark Maple - Moderate
Japanese Maple - Moderate (sensative to disturbance)
Witchhazel - Few to Moderate
American Beech - Extreme
European Beech
Amur Chokecherry
Pagoda Dogwood - Few
Fringe Tree - Few
Hawthorn - Few

This post was edited by whaas on Wed, Jul 3, 13 at 22:04