INDEX 



283 



Page 



Rock Elm (TJlmus americana) Ill 



Rock Elm (Ulmus fulva).... 112 



Rock Elm (Ulmus racemosa) 111, 112, 242 



Rock Maple — - 187 



Rock Oak (Quercus douglasii) 101 



Rock Oak (Quercus montana) 110 



Rock Oak (Quercus muehlenbergii).. 110 



Roekville Nut 51 



Rocky Mountain Boxelder.. 192 



Rocky Mountain Maple 187 



Rocky Mountain Oak 111 



Rocky Mountain Pine 14 



Rocky Mountain Red Cedar 43 



Rocky Mountain Service Tree 135 



Rockv Mountain Shin Oak. Ill 



Rocky Mountain White Oak (Quercus 



leptophylla) 105 



Rocky Mountain White Oak (Quercus 



utahensis: - 105 



Rocky Mountain White Oak (Quercus 



utahensis submollis) 105 



Rocky Mountain White Pine-. 14 



Rocky Mountain Yellow Pine.. 17 



Rosaceae.. 129 



Rose Acacia.. - - 172 



Rose Bay (Rhododendron eatawbiense). 216 



Rose Bay (Rhododendron maximum) 218 



Rose-bay Rhododendron.. 216 



Rose-flower Rhododendron 216 



Rose-flowering Locust.. 172 



Rosemary 21 



Rosemary Pine (Pinus echinata).. 21 



Rosemary Pine (Pinus palustris) 22 



Rosemary Pine (Pinus taeda) 19 



Rosemary Shortleaf 21 



Rosewood 175 



Rotundifoliae.. 148 



Rough Maple 187 



Rough Oak.. 106 



Rough White Oak. 106 



Roughbark Cedar.. 35,241 



Rough-barked Fir 31 



Rough-barked Poplar.. 62 



Roughleaf Dogwood. 215 



Roughleaf Yelvetseed-. 234 



Rough-leaved Cornel 215 



Roundleaf Aspen... 61 



Roundleaf Hawthorn 148 



Round-top Xut Pine.. 18 



Roundtop Poplar 67 



Roundwood.. 133 



Rowan-berry 133 



Rowan-tree (Sorbus americana).. 133 



Rowan Tree (Sorbus aucuparia) 133 



Rowan-wood 133 



Royal Palm 47 



Royal Paulownia 232 



Royal Poinciana.. 170 



"Royal" 50 



Roystonea 47 



Rovstonea regia 47 



Rubber-tree 118 



Rubber-tree, India (Ficus aurea).. 118 



Rubber-tree, India (Ficus brevifoiia; 118 



Rubber-tree, Wild 118 



Rubiaceae 233 



Rulac Californicum.. 192 



Rulac interior 192 



Rulac Nuttallii 192 



Rulac Texana 192 



Rum Cherrv 161 



Running White Oak Ill 



Russian Mulberry 116 



Rusty Blackhaw.. 236 



Rutaceae 173,185 



Rydberg's Cottonwood 63 



Sabal 46 



Sabal mexicana 46 



Sabal palmetto 46 



Sabal texana 46 



Sabine's Pine. 18 



Saddle-leaf 123 



Saddle-tree 123 



Sadler's Oak 99 



Saffron Plum 221 



Sahuarro 209 



St. Lucie Cherry 160 



Salad-tree.. 167 



Page 



Salicaceae 60 



Salix.. 68 



Salix alba. 74 



Salix alba caerulea 74 



Salix alba vitellina 74 



Salix alaxensis 74 



Salix amplifolia 73 



Salix amygdaloides 69 



Salix amygdaloides wrightii.. 69 



Salix babylonica. 74 



Salix balsamifera.. 72 



Salix bebbiana.. 73 



Salix bonplandiana 70 



Salix bonplandiana toumeyi 70 



Salix cordata mackenzieana 72 



Salii discolor 72 



Salix discolor eriocephala 72 



Salix discolor prinoides. 72 



Salix exigua. 71 



Salix flavescens 73 



Salix fluviatilis 71 



Salix fluviatilis exigua 71 



Salix gooddingii 68 



Salix harbinsonii. 68 



Salix hookeriana 73 



Salix laevigata 69 



Salix laevigata forma araquipa 69 



Salix lasiandra 70 



Salix lasiandra eaudata 70 



Salix lasiandra lancifolia 70 



Salix lasiandra lyallii 70 



Salix lasiolepis.. 72 



Salix longifolia 71 



Salix longifolia angusti^sima 71 



Salii longifolia pcducculata.. 71 



Salix Ion gi pes 69 



Salix longipes venulosa 69 



Salix longipes wardii.. 70 



Salii lucida 71 



Salix lucida intonsa 71 



Salix mackenzieana 72 



Salix missouriensis-- 72 



Salix nigra 68, 241 



Salix nigra altissima. 68 



Salix nigra lindheimerii 68 



Salix nigra vallicola.. 63 



Salix nigra Wrightii 69 



Salix nuttallii 73 



Salix occidr-ntalis 69 



Salix Piperi 73 



Salix pyrifolia 72 



Salix rostrata 73 



Salix scouleriana 73 



Salix scouleriana crassijulis... 73 



Salix scouleriana flavescens 73 



Salix sessilifolia 71 



Salix sitchensis.. 74 



Salix sitchensis an gusti folia... 74 



Salix sitchensis forma Coultori 74 



Salix sitchensis forma parvifolia. 74 



Salix sitchensis forma palphnna.. 74 



Salix speciosa 70 



Salix taxifolia. 71 



Salix Toumeyi 70 



Salix vallicola... 68 



Salix wardii 70 



Salix Wrightii. 68.69 



"Salt Pine".. 203 



Saltwater Pine 23 



Sambucus 235 



Sambucus callicarp3 236 



Sambucus canadensis 235 



Sambucus coerulea 235 



Sambucus coerulea arizonica 236 



Sambucus coerulea velurina 235 



Sambucus glauca 235 



Sambucus intermedia 235 



Sambucus simpsonii 23c 



Sambucus velutina 235 



Samuela 48 



Samuela Faxcniana 48 



San Diego Palm 46 



San Domingo Mahogany. 178,242 



Sand Black Jack Oak 88 



Sand Jack (Quercus catesbaei) 88 



Sand Jack (Quercus cinerea) 95 



Sand Pine (Pinus clausa) 20 



Sand Pine (Pinus contorta) 18 



