130 



ESSA YS. 



Lamium, Llgustrum, Kochia? Daphne, Thesium, Buxus, 

 Mercurialis, Cephalanthera, Paris, Asparagus, — to which 

 may as well be added Paeonia and Bupleurum, the former 

 having a representative on the mountains, and the latter in 

 the arctic regions, of western America, but both absent from 

 the rest of our continent. Excepting Paederota and Buxus 

 (the latter a rather doubtful native of eastern Asia), none 

 of these genera are peculiar to Europe, but all extend 

 throughout Asia and elsewhere over large parts of the world. 

 The following incomplete list of North American genera 

 or peculiar subgeneric types represented in Japan and its 

 vicinity, but unknown in Europe, presents a very different 

 appearance. Those which are absent from the flora of western 

 North America are italicized. 



Trautvetteria 

 Cimicifuga (barely 



reaches Europe) 

 Illicium 

 Magnolia 

 Cocculus and Meni- 



spermum f 

 Mahonia 

 Caulophyllum 

 Diphylleia 

 Brasenia 

 Nelumbium 

 Dicentra 



Stuartia (& Gordonia?) 

 Zanthoxylum 

 Cissus 

 A mpelopsis 

 Berchemia 

 JEsculus 

 Sapindus 

 Negundo 

 Thermopsis 

 Wistaria 

 Desmodium 

 Lespedeza 

 Rhynchosia 

 Sophora 

 Photinia 



Philadelphus 



Penthorum 



Hamamelis 



Liquidambar 



Cryptotcenia 



Cymopterus ? 



Archemora 



Osmorrhiza 



Aralia and § Ginseng 



Echinopanax 



Diervilla 



Mitchella 



Oldenlandia 



(Siegesbeckia, in 



Mexico) 

 Cacalia (reaches 



E. Europe) 

 Gaultheria 

 Leucothoe 

 Pieris 

 Clethra 

 Menziesia 

 Symplocos 

 Ardisia 

 Boschniakia 

 Catalpa 

 Tecoma 

 Dicliptera 



Asarum, § Heterolropa 



Phytolacca 



Benzoin and Sassafras f 



Tatrantheru 



Saururus 



Pachysandra 



Laportea 



PUea 



Bcehmeria 



Microptelea 



Madura 



Juglans 



Abies, § Tsuga 



Chamaecyparis 



Torrea 



Arisama 



Arctiodracon 



Pogonia 



A rethusa 



Dioscorea 



Aletris 



Coprosmanthus 



Trillium 



Clintonia 



Streptopus, § Hekori- 



ma 

 Chammlirium f 

 Sporobolus 



