i88 9 .] 



BOTANICAL GAZETTE. 



3" 



cliffs through which these streams flow at that point, and are 

 the oldest rocks brought to view in the state. They give 

 rise to no soil ; the plants mentioned as occurring on them 

 are found growing in crevices in the cliffs. 



Silene rotundifolia Nutt. 

 Polygala Senega L. 

 Cladrastis tinctoria Raf. 

 Ribes Cynosbati L. 

 ■Galium trifidum L. 

 G. circaezans Michx. 



Nemophila microcalyx Fisch. and 



Meyer. 

 Enslenia albida Nutt. 

 Ulmus racemosa Thomas. 

 Tradescantia pilosa Lehm. 



Birdseye. — The Birdseye is found just above the Chazy. 

 and like it is seen only at and near the mouth of Dix river. 

 It forms no soil ; the plants mentioned are found in fissures 

 in the rock. 



Arenaria pa tula Michx. 

 Polygala Senega L. 

 Galium trifidum L. 



Juniperus Virginians L. Covering 

 the cliff wherever it can get a 

 foothold. 



Trenton.— There are four phases or divisions of the 

 Trenton in this section : (i) at the base a siliceous clay : (2) 

 beds of gray and dark blue limestones— the Blue Grass Beds; 



(3) a granular limestone, frequently nearly a sandstone ; and 



(4) dove-colored limestones, much like the Birdseye. Allot 

 the series form excellent soils, the Blue Grass limestones giv- 

 ing the best in the state— the famed Blue Grass soils. 



(Siliceous limestone.) 



Liriodendron Tulipifera L. 

 Silene noctiflora L. 

 Hydrangea arborescens L. 

 Quercus alba L. 

 Fagus ferruginea Ait. 

 Stylophorum diphyllum Nutt. 

 Tilia Americana L. 



. *»w%«~.— . Wang 



Gymnocladus Canadensi 



Lam. 



Prunus serotina Ehrliart. 

 Geutn macrophyllum Willd. 

 Fraxinus quadrangular Michx. 

 Ulmus Americana L. 

 Celtis occidentalis L. 

 Morus rubra L^ 

 Carya sulcata Nutt. 

 Polygonum biflorum Ell. 

 Quercus Prinus L. 



(Granular Limestone. -Entirely barren at the only place 

 I have seen it in this county.) 



(Upper Birdseye.) 



Juniperus Virginiana L. 



Lower Hudson River. -These beds are made up of al- 

 ternate layers of limestones and shales ; where exposed the 



