Alleghanian—Ozark Distriet: Kentucky-Tennessee. 507 
Quercus coccinea Muench. Platanus occidentalis L. 
> tinctoria Bartr. (= Q. velutina | Amelanchier canadensis L. 
Lam.). Robinia pseudacacia L. 
» aquatica Walt. (= Q. nigra | Rhus venenata DC. (=R. vernix L.). 
L.) Acer rubrum 
Sassafras officinale Nees & Eberm. Cornus (Oysocylon) florida L. 
—=S., variifolium Salisb.). Oxydendrum arboreum L. 
Liriodendron tulipifera L. Kalmia latifolia 
Liquidambar styraciflua L. Diospyros virginiana L. 
QOuercus alba follows the deep loamy soil of the hollows; ZLiriodendron 
grows a little higher up, where it mingles on the slopes with Ouercus coccinea, 
Castanea dentata, grows on the thin dry soil of the ridges, while Acer rub- 
rum confined itself to the swampy hollows. Oxydendrum arboreum grows on 
the creek slopes, while Salir nigra clings to the water’s edge with Robinia 
pseudacacia, Diospyros virginiana, Cornus florida on the levels’). 
On the summits of the sharper ridges of the plateau the forest is composed of 
Castanea dentata, Q. Prinus and Q. coceinea. The chestnuts predominate in this type of forest. 
A little below the ridges on tbe slopes grows as the dominant tree, Quercus coccinea, associated 
with Quercus alba, Carya poreina (= Hicoria glabra), Nyssa sylvatica (= N. multiflora), Quercus 
Prinus, Q. obstusiloba (= Q. minor), Liriodendron tulipifera (a few trees). The broad level tops 
of some of the ridges and certain bottom lands -are classed as oak flats with a ezeng good 
soil. Here white oaks Quercus alba are found and (). coccinea, (). obtusiloba and Carya poreina 
(= Hicoria glabra). The soil of ee low land which 2 at the foot of the ae is always the 
deepest and most moist on the plateau. 'The s oms contain Acer rubrum, Nyssa syl- 
vatica, Liquidambar styraciflua = Eaka rn je se tulipifera on the drier ground, 
2. Barrens, Cliffs and Cedar Glades. 
Barren Formation. The barrens of southern Indiana occupy a large 
area in the corners of four counties, Clarke, Floyd, Washington and Harrison. 
Sink holes abound in a country covered with flinty stones and concretionary 
boulders. As a result thickets of scrub oak and small shrubby plants abound 
with openings of some extent between which were found Ziatris scariosa, Eupa- 
forium sessilifolium L.”), Brachychaeta cordata, Solidago rigida, S. nemoralis, 
Sılphium trifoliatum, Rudbeckia laciniata, Lepachys pinnata, Helianthus mollis, 
H.rigidus, H. parviflorus, H. hirsutus, Dysodia chrysanthemoides, Stylosanthes 
elatior, Desmodium rotundifolium, Lespedeza procumbens, Tephrosia virginiana, 
Strophostyles helvola, Eryngium yuccaefolium. Similar barrens are also found 
in southern Illinois. 
Cedar Barren Formation. In the highlands of middle Tennessee — somber 
tint of the red cedar Jumiperus virginiana delineates a cedar barren where 
the rock is exposed and where occur beneath the trees, (viz: Ce/tis, Gleditschia, 
1) FoLey, Joun: Conservative Lumbering at Sewanee, Tennessee. U, S. Bureau of Forestry 
Bulletin 39 (1903); 8—9. 
2) CouLrer, J. M.: The Barrens of southern Indiana, Botanical Gazette II: 145. 
