Creosote bush _Larrea tridentata_ (DC.) Cov. Crowberries _Empetrum_ sp. Currant _Ribes_ sp. Cypress Dogwood _Cornus_ sp. Douglas-fir _Pseudotsuga menziesii_ (Mirb.) Franco Duckweed _Lemna_ sp. Ebony _Diospyros_ sp. Elderberry _Sambucus_ sp. Elm _Ulmus_ sp. Elm, American _Ulmus americana_ L. Fig _Ficus_ sp. Fir _Abies_ sp. Fir, balsam _Abies balsamea_ (L.) Mill. Fir, red _Abies magnifica_ A. Murr. Fir, subalpine _Abies lasiocarpa_ (Hook.) Nutt. Fir, white _Abies concolor_ (Gord. & Glend.) Lindi. Grapes, wild _Vitis_ sp. Gum, black _Nyssa sylvatica_ Marsh. Gum, sour _Nyssa_ sp. Hackberry _Celtis_ sp. Hazelnut _Corylus_ sp. Hemlock _Tsuga_ sp. Hickory _Carya_ sp. Hickory, bitternut _Carya cordiformis_ (Wangenh.) K. Koch Holly _Ilex_ sp. Honeysuckle _Lonicera_ sp. Huisache _Acacia farnesiana_ (L.) Willd. Ironwood _Olneya tesota_ Gray Juniper _Juniperus_ sp. Larch _Larix_ sp. Larch, western _Larix occidentalis_ Nutt. Lettuce _Lactuca_ sp. Loganberries _Rubus_ sp. Magnolia _Magnolia_ sp. Maize _Zea mays_ L. Maple _Acer_ sp. Maple, red _Acer rubrum_ L. Maple, silver _Acer saccharinum_ L. Mescal _Agave_ sp. Mesquite _Prosopis_ sp. Millet _Setaria_ sp. Mistletoe _Phoradendron_ sp. Oak _Quercus_ sp. Oak, black _Quercus velutina_ Lam. Oak, blackjack _Q. marilandica_ Muenchh. Oak, bur _Q. macrocarpa_ Michx. Oak, cherrybark _Q. falcata_ var. _pagodaefolia_ Ell. Oak, live _Q. virginiana_ Mill. Oak, overcup _Q. lyrata_ Walt. Oak, pin _Q. palustris_ Muenchh. Oak, red _Quercus_ sp. Oak, white _Q. alba_ L. Oats _Avena_ sp. Palmetto _Sabal_ sp. Palo Verde _Cercidium_ sp. Pear _Pyrus_ sp. Pecan _Carya illinoensis_ (Wang.) K. Koch Pepper, red _Capsicum_ sp. Pigweed _Chenopodium_ sp. Pine _Pinus_ sp. Pine, Bishop _Pinus muricata_ D. Don. Pine, Jeffrey _P. jeffreyi_ Grev. & Balf.