HOUGH'S AMERICAN WOODS. 



*Rhamnus insularis 



*Rhamnus purshiana 



Rhododendron calif ornicum . 



Rhododendron maximum . . 



*Rhus copallina 



*Rhus hirta Sudw. (R. 

 typhina L. ) 



Rhus integrifolia 



Rhus laurina 



Rhus ovata 



*Rhus vernix 



*Ricinus communis 



*Robinia pseudacacia 



* Salix alba, var. vitellina . . . 



* Salix amygdaloides 



Salix ftuviatilis 



Salix laevigata 



Salix lasiandra 



Salix lasiolepis 



Salix longipes 



Salix missouriensis 



*Salix nigra 



Salix nuttallii 



Salix sitchensis 



*Sambucus glauca 



Sam bucus mexicana 



*Sapindus drummondi 



*Sassafras, sassafras Karst. 

 (8. Officinale N. & E.) .. . 



Schinus molle 



*Sorbus scopulina Greene 

 (Pyrus sambucifolia C. & 



S.) 



*Sequoia washing toniana 

 Sudw. (8. gigantea 

 Descn. ) 



* Sequoia sempervirens End!.. 

 Symplocos tinctoria 



*Taxodium distichum- 



*Taxus brevifolia 



* Thuja occidentalis 



* Thuja plicata (T, gigantea) 



*Tilia americana 



*Toxylon pomiferum 



*Tsuga canadensis Carr. 

 ( Abies Canadensis Michx. ) 



Tsuga caroliniana 



Tsuga heterophylla 



Tsuga mertensiana Carr. 



(T. Pattoniana Engel.) . . 



*Tumion californicum Greene 



(Torreya Calif or nica 



Torr.) 



Tumion taxifoliutn Greene 

 ( Torreya taxifolia Arn. ) . 



Vlmus alata 



*Ulmus americana 



*Utmu8 thomasi (U. race- 



mosa) 



*Ulmus pubescens Walt. (U. 



fulva Michx. ) 



Umbellularia calif 'arnica. . . . 



*Vaccinium arbor eum 

 * V it-is aestivalis . 



Part 



V 



VI 



I 



IX 

 III 

 XII 



I 



XII 

 IX 



I 



VII 



No. 



119 



144 



24 



220 



3 



291 



21 

 299 

 223 



VII 171 



VI 14o 



V 120 



XII 289 



II 33 



II 34 



11 

 159 



XI 258 

 IV 78 



*Washingtonia filifera ro- 

 busta Parish (W. fila- 

 mentosa 0. K. ) VII 200 



Xanthoxylum clava-herculis. V 106 

 *Yucca arborescens .. VII 175 



