INTRODUCTION 



23 



of the ice-sheet seems to have been via the Delaware. It is 

 significant that so many northern plants have been found on this 

 strip, and it seems very probable that all those "West Jersey" 

 species found along the coast are migrants around the Beacon 

 Hill formation since the final rising of the coastal plain as described 

 in paragraphs 20 and 21. The list of these apparently extra- 

 territorial species as detected by Dr. Stone follows: 



Ophioglossum vulgatum, 

 Lycopodium complanatum 

 Potamogeton pectinatus, 

 Cinna arnndinacea, 

 Bromus purgans, 

 Elymus striatus, 

 Cyperus diandrus, 

 Carex lanuginosa, 

 Juncus articulatus, 

 Vagnera stellata, 

 Unifolium canadense, 

 Liparis Loeselii, 

 Ibidium plantagineum, 

 Populus tremuloides, 

 Morns rubra, 

 Parietaria pennsylvanica, 

 Silene stellata, 

 Sagina procumbens, 

 Moehringia lateriflora, 

 Aauilegia canadensis, 

 Arab is lyrata, 



Fragaria virginiana, 

 Sanguisorba canadensis, 

 Rosa virginiana, 

 Crataegus Crus-galli, 

 Falcata comosa, 

 Phaseolus polystachyus, 

 Robertiella Robertiana, 

 Polygala verticillata, 

 Celastrus scandens, 

 Hypericum boreale, 

 Myriopliyllum tenellum, 

 Samolus floribiindus, 

 Sabbatia angularis, 

 Gentiana crinita, 

 Dasy Stephana A ndrewsii, 

 Lycopus uniflorus, 

 Scrophularia leporella, 

 Helianthus giganteus, 

 Cirsium discolor, 

 Cirsium miiticum. 



So much for the probable effects of the glacier on the coastal 

 plain excluding the pine-barrens. 



36. If the ice did not affect the pine-barrens geologically, so 

 much as it did the surrounding country, there seems little doubt 

 that it was at this time that many additions were made to the 

 flora of that region. All of the following species, ranging as they 

 do from the north to the pine-barrens of New Jersey show un- 

 mistakable evidences of having come down with the glacier. 

 Many of them became isolated in bogs and other edaphically 

 favorable places, such as were probably only to be found on or 



