No. 17] FLOWERING PLANTS AND FERNS 55 
Avicennia nitida (on muck Solidago sempervirens 
islands) Borrichia frutescens 
Pluchea camphorata Aster tenuifcla 
Crantzia lineata Gerardia maritima 
Hydrocotyle ranunculoides Seutera maritima 
Hydrocotyle interrupta Batis maritima 
Sensuvium portulacastrum Salicornia herbacea 
Iva frutescens Atriplex cristata 
Statice Caroliana Utricularia subulata 
Dichromena leucocephala (in 
brackish marshes) 
The species given here are only a small proportion of those 
occurring in this regicn of coastal flats. Comparing the flora 
of these flats and adjacent pine uplands with the pine barrens 
flora of the Atlantic coastal regoin—of southern New Jersey, 
for example—a remarkable paralellism will be noted. In 
general character the two flcras have much in common, and 
many species are identical, or represented by elcsely related 
forms. Both have a comparatively large number of species 
peculiar to the region, and, as just stated, a good many in com- 
mon that are not shown by other regions, though the Bog ficra 
of the northern United States approaches closely in character 
and aspect that of the pine barrens. General similarity of soil 
conditions may be sufficient to explain the persistence of these 
peculiar floras in their particular situations, but hardly ae- 
counts for their origin in such widely separated areas. 
