INDEX OF SCIENTIFIC NAMES 
Numbers refer to maps. Where there is more than one for a species, the number is followed by a letter for the base map: W 
(Western United States, vertical), NW (Northwestern United States, horizontal), SW (Southwestern United States, horizontal), and 
N (North America). 
Acacia berlandieri, 1—N, 1-SW 
Acacia farnesiana, 2 
Acacia greggil, 3 
Acacia rigidula, 4 
Acacia roemeriana, 5 
Acacia tortuosa, 6—N, 6-SW 
Acacia wrightii, 7 
Acer circinatum, 8 
Acer glabrum, 9-N, 9-W 
Acer grandidentatum, 10 
Aesculus californica, 11 
Alnus oblongifolia, 12 
Alnus rhombifolia, 13 
Alnus sinuata, 14—N, 14-W 
Alnus tenuifolia, 15—N, 15—W 
Amelanchier alnifolia, 16—N. 16-—NW 
Amelanchier utahensis, 17 
Arbutus arizonica, 18 
Arbutus texana, 19 
Arctostaphylos pringlei, 20 
Artemisia tridentata, 21-NW, 21-SW 
Betula occidentalis, 22—N, 22-NW 
Bumelia celastrina, 23—N, 23-SW 
Bumelia lanuginosa, 24 
Bursera fagaroides, 26—N, 26-SW 
Bursera microphylla, 25 
Caesalpinia mexicana, 27-N, 27-SW 
Canotia holocantha, 28 
Ceanothus arboreus, 29 
Ceanothus spinosus, 30 
Ceanothus thyrsiflorus, 31 
Celtis lindheimeri, 32 
Celtis reticulata, 33—N, 33-NW, 33-SW 
Cephalanthus occidentalis, 34-—NW, 34- 
SW, 34-N 
Cercidium floridum, 35 
Cercidium macrum, 36 
Cercidium microphyllum, 37 
Cercis canadensis, 38—N, 38-SW 
Cercis occidentalis, 39 
Cercocarpus betuloides, 40 
Cercocarpus breviflorus, 41 
Cercocarpus ledifolius, 42 
Cercocarpus traskiae, 43 
Cereus giganteus, 44 
Chilopsis linearis, 49 
Citharexylum berlandieri, 45—N, 45-SW 
Condalia globosa, 46 
Condalia hookeri, 47 
Cordia boissieri, 48—N, 48-—SW 
Cornus glabrata, 50 
Cornus nuttallit, 51-NW, 51-SW 
Cornus occidentalis, 52 
Cornus sessilis, 56 
Cornus stolonifera, 53—N, 53—NW, 53-SW 
Corylus cornuta, 54—N, 54-NW 
Cowania mexicana, 55—N, 55-SW 
Crataegus chrysocarpa, 57 
Crataegus columbiana, 58—N, 58-NW 
Crataegus douglasii, 59-N, 59-NW 
Crataegus erythropoda, 60 
Crataegus saligna, 61 
Crataegus succulenta, 62 
Crataegus tracyl, 63 
Dalea spinosa, 64 
Diospyros texana, 65 
Dodonaea viscosa, 66—N, 66-SW 
Ehretia anacua, 67-N, 67-SW 
Erythrina flabelliformis, 68-N, 68-SW 
Esenbeckia berlandieri, 69-N. 69-SW 
Euonymus occidentalis, 70 
Eysenhardtia polystachya, 72—N, 72-W 
Eysenhardtia texana, 71 
Forestiera angustifolia, 73—N, 73-W 
Forestiera phillyreoides, 74 
Fraxinus anomala, 75 
Fraxinus berlandieriana, 76 
Fraxinus cuspidata, 77 
Fraxinus dipetala, 78 
Fraxinus gooddingti, 79 
Fraxinus greggii, 80-—N, 80-SW 
Fraxinus papillosa, 81 
Fraxinus texensis, 82 
Fraxinus velutina, 83 
Fremontodendron californicum, 84 
Fremontodendron mexicanum, 85 
Garrya elliptica, 86 
Guaiacum angustifolium, 87 
Helietta parvifolia, 89-N, 89-SW 
Holacantha emoryi, 88 
Juglans californica, 90 
Juglans hindsii, 91 
Juglans major, 92-N, 92-SW 
Juglans microcarpa, 93 
Koeberlinia spinosa, 95—N, 95-SW 
Leucaena pulverulenta, 96-—N, 96-SW 
Leucaena retusa, 94 
Lyonothamnus floribundus, 98 
Lysiloma microphylla, 97-N, 97-SW 
Malus diversifolia, 1OO—N, 100-—W 
Morus microphylla, 99 
Myrica californica, 101 
Nolina bigelovii, 102 
Olneya tesota, 103 
Opuntia fulgida, 104 
Ostrya chisosensis, 105 
Ostrya knowltonii, 106 
Parkinsonia aculeata, 107 
Photinia arbutifolia, 109-NW, 109-SW 
Pistacia texana, 108 
Pithecellobium flexicaule, 110—N, 110- 
SW 
Pithecellobium pallens, 111—N, 111-SW 
Platanus racemosa, 112 
Platanus wrightii, 113 
Populus angustifolia, 114 
Populus arizonica, 115 
Populus hinckleyana, 116 
Prosopis juliflora, 118—N, 118-SW 
Prosopis pubescens, 117 
Prunus americana, 119-NW, 119-SW 
Prunus angustifolia, 120 
Prunus emarginata, 122—N, 122—W 
Prunus fremontii, 121 
Prunus ilicifolia, 123 
Prunus lyonii, 124 
Prunus pensylvanica, 125—N, 125-NW 
Prunus subcordata, 126 
Prunus virginiana, 127—N, 127-NW, 127- 
SW 
Ptelea crenulata, 129 
Ptelea trifoliata, 128—N. 128-SW 
Quercus ajoensis, 130 
Quercus arizonica, 131 
Quercus dunnii, 132 
Quercus engelmannii, 133 
Quercus glaucoides, 134 
Quercus graciliformis, 135 
Quercus gravesti, 136 
Quercus grisea, 137 
Quercus havardii, 138 
Quercus hypoleucoides, 139 
Quercus macdonaldii, 140 
Quercus mohriana, 141 
Quercus oblongifolia, 142 
Quercus pungens, 144 
Quercus rugosa, 143-—N, 143-SW 
Quercus tardifolia, 136 
Quercus tomentella, 145 
Quercus toumeyi, 146 
