3 12 



BOTANICAL GAZETTE. 



[ December, 



latter decompose very rapidly, giving rise to an excellent 



soil. 



Euonymus atropurpureus Jacq. 



Quercus alba L. 



Q. obtusiloba Michx. 



Q. imbricaria Michx. 

 Trillium grandiflorum Salisb. 



Middle Hudson River. — Composed of sandy shales and 

 sandstones, which give rise to a soil that remains moist in the 



driest weather. 



Liriodendron TulipiferaL. 

 Oxalis violacea L. 

 Cuphea viscosissima Jacq. 

 Asclepias incarnate L. 

 Polygonum Virginianum L. 



P. dumetorum L. 



Euphorbia humistrata Engelm 



E. commutata Engelm. 

 Fagus ferruginea Ait. 

 Trillium grandiflorum Salisb. 



Uppkr Hudson River. — These beds fall naturally into 

 three divisions; at the base (i) a limestone (full of fossils) 

 in thin layers, between which are layers of clay shales ; this 

 division decomposes rapidly, forming an excellent soil; (2) 

 sandy limestones, in beds of considerable thickness ; and (3) 

 a limestone containing much earthy matter and silica. 



(1. Lower Division.) 



Anemone Caroliniana Walt. 

 Ranunculus muricatus L. 

 Vquilegia Canadensis L. 

 Dicentra cucullaria DC. 

 D. Canadensis DC. 

 Corydalis flavula Raf. 

 Dentaria multifida Muhl. 

 Silene Virginica L. 

 Lychnis Githago L. 

 Prunus serotina Ehrhart. 



(2. Middle Division.) 



Impatiens pallida Nutt. 

 I. fulva Nutt. 



Trifolium procumbens L. 



(3. Upper Division.) 



Galium triflorum Michx. 

 Eupatorium serotinum Michx. 

 Scrophularia nodosa L. 



Eupatorium ageratoides L. 

 Aster oblongifolius Nutt. 

 Collinsiaverna Nutt. 

 Fraxinus quadrangulata Michx. 



Celtis occidentalis L. 

 Juglans cinerea L. 



Quercus alba L. 



1 1 Prinus L.var. acuminata Michx. 



Trillium sessile L. 



Oenothera biennis L. 

 Galium Aparine L. 

 Asclepias Cornuti Decaisne 



Vsclepias tuberosa L. 

 Pilea pumila Gray. 

 Pardanthus Chinensis Ker 



Medina.— Soft, easily pulverized, giving a sandy soil 

 which erodes badly, and which once denuded of vegetation 

 rarely becomes covered again. 



Sassafras officinale Nees. Q. obtusiloba Michx. 



Quercus alba L. q, f a 1 cata Michx. 



