* 
in its relations to that of North America. 191 
Hedera, Asperula, Rubia, Carpesium, Ligularia, Lampsana, Picris, 
Pederota, Ajuga, Thymus, Nepeta, Lamium, Ligustrum, Kochia? 
phne, Thesium, Bucus, Mercurialis, Cephalanthera, Paris, As- 
paragus,—to which may as well be added Peonta 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 Pederota and 
(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 pe- 
culiar subgeneric types represented in Japan and its vicinity, but 
unknown in Europe, presents a very different appearance. Those 
ce s absent from the flora of Western North America are 
laneised, 
oe rillium — 
SaRIEY Philadelphus — Asarum § Heterotropa 
Cimicifuga (barely reaches Penthorum Phytolacca 
Europe) ammelis Benzoin & Sassafras ? 
Iilicium Liquidambar -Tetranthera 
agnolia ryptoteenia 
Cocculus é Menispermum Cymopterus? Pachysandra 
Mahonia Archemora Laportea 
Caulophyllum : 
Diphylleia Aralia & § Ginseng Bochmeria 
Braseni Echinopanax Microptelea 
Nelumbium Diervilla Maclura 
Dicen Mitchel Juglans 
Stuartia (& Gordonia?) Oldenlandia Abies § Tsuga 
Zanthozylum (Siegesbeckia, in Mexico) Chamzecyparis 
Cissus Cacalai (reaches E.Europe) Torreya 
Ampelopsis Gaultheria rise 
Berchemia Leucothoé retio 
2 Asculus ieris -ogonia 
4 sx pindus Clethra Arethusa 
4 eames ‘ Menziesia : 
q Sympl letris 
Pvc ard 
treptopus § Hekorima, 
Jhameelirium ? 
QROYAb 
3 
5 
