Class No. 1—100% Poplar; Lance-leaf (Populus acu-minata) Narrow-leaf (Populus an-gustifolia)
Class No. 2—80% Fir, Alpine (Abies lasiocarpa) Pine: Bristlecone (Pinus aristata) Limber (Pinus flexilis) Lodgepole (Pinus contorta latifolia)
Poplar: Eugene (Populus cana-densis eugenei) Southern [Balsam] (Populus deltoides mis-souriensis)
Spruce: Colorado (Picea pun-gens) Englemann (Picea en-glemanni)
Willow: Sharp-leaf (Salix acuti-folia) Yellow-stem White (Salix alba vitellina)
Small Trees
Class No. 1—100% Aspen, Quaking (Populus tremu-loides)
Class No. 2—80% Aspen, Big-tooth (Populus gran-didentata) Willow, White (Salix alba) For Dry Plains Areas, 3500 to 5000 Feet
Large Trees
Class No. 1—100% Elm, Siberian (Ulmus pumila) Hackberry, Common (Celtis oc-cidentalis) Locust, Common Honey (Gledit-sia triacanthos) Poplar, Plains (Populus sargentii)
Class No. 2—80% Ash, Green (Fraxinus pennsyl-vanica lanceolata) Elm, American (Ulmus ameri-cana) Maple, Silver (Acer sacchari-num)
Small Trees
Class No. 1—100% Olive, Russian (Eleagnus angus-tifolia)
Class No. 2—80% Mulberry, Russian (Morus alba tatarica)