10 (9) Leaves opposite (at least below), 

 lanceolate, sharply 6-15 toothed 

 on each side, 2-5 cm broad; prom- 

 inently 3-veined (nerved) ; plants 

 primarily at ditch edge and higher 



ground in tidal marshes Iva frutescens 



var. oraria, Marsh Elder, High 

 Tide Bush 



Figure 8.— Leaf X 1- 



10 (9) Leaves alternate, obovate or del- 

 toid-obovate, coarsely dentate 

 (toothed) on upper two-thirds of 

 leaf; plants dioecious (male and 

 female separate) ; white fluffy pap- 

 pus on the achenes of female plant 



in the fall Baccharis halimifolia, 



Sea Myrtle, Groundsel Tree 



Figure 9.— Leaf XL 



11 (9) Trees only (single main stem). .. 

 11 (9) Shrubs only (several main stems). 



12 

 18 



12 (11) Simple ovate leaves, entire or 

 with two or three apical lobes all 

 on the same tree; bark spicy- 

 aromatic; young twigs green; 



fruit an ovoid blue drupe 



Sassafras albidum, 



Sassafras 



Figure 10. — Leaves X % 



12 (11) Simple leaves, but without apical lobes 13 



