302 



BOTANICAL GAZETTE 



[OCTOBER 



Hiidsojiia 



tions. Of the monocotyledons, next in importance to Ammo- 



phila 



'idrop^ 



it are 



also 



Ammophila decreases toward the west. With 



associated in different places (besides various dicotyledons) 



Agrostis alba, A. hy emails {A, sea bra), Eragrostis pectiiiacea, Pa?ii- 



FiG. 9. — Heath south of Rehoboth, looking nearly due west. 



cum sphaerocarpon, P. viscidiun [P, scoparitim), and Poa com- 

 pressa; Paspalum setaceum occxxrvmg rarely. In many places there 

 appeared a carpet of lichens and mosses, the most prominent of 

 which were ''reindeer moss" {^Cladoiiia rangljerina) and Cerato- 

 doH purpurea, while Geasters occurred frequently in such situa- 

 tions. Lianas were almost entirely absent, Parthenocissus 

 quinquefolta {Ampelopsis quinqiiefolio) being found at only three 

 points, Vitis aestivalis on one dune summit, while Sfnilax rotimdi- 

 folia occurred only in the pine swamp described. 



At one point south of Rehoboth, a single dune rising from a 

 bare space has developed upon its summit a heath flora, com- 





t 



^ 



I 



'^. 



