ALTAMAHA GRIT REGION OF GEORGIA 329 



Pinus serotina Quercus Margaretta 



Nyssa Ogeche Pinus Taeda 



Quercus brevifolia Acer rubrum 



Liriodendron Tulipifera Liquidambar Styraciflua 



SHRUBS. 



Ilex glabra Pieris nitida 



Pinckneya pubens Cliftonia monophylla 



Hypericum fasciculatum Viburnum nudum 



Cyrilla racemiflora Ilex myrtifolia 



HERBS. 



Aristida stricta Pteridium aquilinum pseudo- 

 Sarracenia flava caudatum 



Eriocaulon decangulare Pontederia cordata 



Chondrophora nudata Ludwigia pilosa 



Eriocaulon lineare Stillingia sylvatica 



Sarracenia minor Baptisia lanceolata 



Cracca Virginiana Baldwinia uniflora 



Eriogonum tomentosum Polygala cymosa 



Kuhnistera pinnata Baldwinia atropurpura 



Syngonanthus flavidulus Baptisia perfoliata 



Oxypolis filiformis Mesadenia lanceolata virescens 



Helianthus Radula Marshallia graminifolia 



The distinction between trees and shrubs is not a sharp one, 

 and some of the above will be found in both categories a few 

 pages farther on. 



Notable absentees. From a phytogeographical standpoint the 

 plants which do not occur in a given region are almost as im- 

 portant as those which do. I have elsewhere (Bull. Torrey 

 Club 32: 147. 1905) called attention to a number of species 

 which are conspicuous by their absence, but it may not be out 

 of place to repeat some of the same data here in a different 

 way, with a considerable number of additions. 



The following genera, each having three or more representa- 

 tives in the Eastern United States and at least one in South 

 Georgia, are wanting, or if present very rare, in the Altamaha 

 Grit region. 



Monarda Asarum 



Nama (Hydrolea) Celtis 



Cicuta Boehmeria 



Hydrocotyle Populus 



Svida (part of Cornus) Uvularia 



Jussiaea Trillium 



Lythrum Homalocenchrus 



Tilia Potamogeton 



Rosa Typha 



Hydrangea Adiantum 



Ranunculus Phegopteris 

 Polygonum (in the broadest sense) 



