224 Part III. Chapter 3. 
Danthonia sericea Nutt. Berchemia volubilis Hill. (= B. scan- 3 
Uniola gracilis Michx. dens DC.) ; 
Fau.lazei) Cissus ampelopsis Pers. (= Ampelop- 
Poa Chapmaniana Scribn. sis cordata Michx.). i 
Arundinaria macrosperma Michx. Vitis (Muscadinia) rotundifolia Michx. 
» tecta Walt. Aralia spinosa L e 
Lilium carolinianum Michz. Leucotho& (Andromeda) racemosa (L.) ; 
Ulmus alata Michx. Oxydendrum arboreum (L.) DC. 2 
Parnassia grandifolia DC. Gaylussacia dumosa Andr. . 
Decumaria barbara L. Vaccinium (Batodendron) arboreum 
Crataegus uniflora Muench. Chionanthus solitaria Rydb. 
> rotundifolia Ehrh. 
Most of the species, as well as many of the genera, comprised in this 
second category are characteristic neither of tropic nor of high 
northern regions. They belong in great part to groups which are most 
largely represented at present in the mountainous parts of the warm belt of & 
the northern temperate zone, in both the eastern and western hemispheres. 
To be considered in connection with this category of species are those 
which occur both within the main limits of the southern coastal area and in ee: 
the mountains of the Appalachian region. With the exception of Clethra 
(which is largely tropic) all these genera have their present center of distri- 
bution in the warmer part of the north temperate zone. This may be said e: 
also of the larger groups to which many of them belong, e. g., the families 
Calycanthaceae, Sarraceniaceae, Hamamelidaceae, and Monotropaceae, and the 
tribes Hydrangeae of Saxifragaceae and Andromedeae of Ericaceae. Some E 
of them are known to belong to floral types which were widely distributed in 
the northern hemisphere during the early part of the Tertiary, in not a few ä 
cases ranging, as far north, as Greenland and Alaska. Very broadly speaking 
several of these genera represent groups which appear to be on the wane, 45 
distinguished from the dominant and aggressive types of neotropic origin which 
appeared later in the mountains and to which we shall refer. A faint indication | 
of a coastal plain element in the mountain flora ‘) is perceptible, as far north, E 
as West Virginia and southeastern Kentucky; while, on the mostly granitit 
outerops in northern central Georgia and northern Alabama, of which Stone E 
Mountain is a type, it is so extensive as to somewhat obscure the main flora. nn 
The occurrence of coastal plain species of southern origin (lower austral) at EN 
higher elevations in the midst of a transition flora demands attention. , 
Some of the species occurring on Lookout Mountain, but not reported 
from other stations in the mountains, e. g., Pinus taeda, Cocculus (Ce batla) 
carolinus, Vaccinium (Batodendron) arboreum, and Spigelia marylandica also 
Itea virginica L. Symplocos tinctoria L. [Marsh. 
| 
1) KEARNEY, THoMas H.: The lower austral Elements in the Flora of the southern Appa“ 
lachian Region. Science new ser. XII: 832. Nov. 30, 1900. 
