190 IOWA ACADEMY OF SCIENCES. 



between the saw palmettos and the water, covered with a 

 carpet of low herbs. Hammocks are small areas of richer 

 soil and hence covered with a more dense forest vegetation. 

 If cabbage palmettos predominate it is called a palmetto 

 hammock. Bay-heads are rich, swampy areas covered with 

 dense forests in which the bay tree is found. Along the 

 river are marshy flats, in many cases devoid of forests, 

 except what are called palmetto flats, where the cabbage 

 palmettos are scattered over the surface. 



Along the seacoast there is the usual strand flora, back 

 of which is generally a line of low dunes upon which grow 

 thickets of tropical plants such as Pithecolohium TJngais- 

 Cati and Forestiera porulosa. In places the strand will 

 extend back into a sandy, flat prairie covered with bunch 

 grasses and herbs. Where the soil is low enough to be 

 under water at high tide, mangrove swamps flourish. The 

 chief species here are Rhizophora, Avicennia and Lagun- 

 cularia. Below is likely to be a carpet of Bafis maritima^ 

 Sesuvium and Salicornia. In other places there are exten- 

 sive salt marshes covered by grasses and sedges, such as 

 S parti na juncea and Fiinhri/stilis castenea. These are the 

 chief formations observed. 



Magnolia Glauca, L. Myers. Rather common in bay- 

 heads. 



AsiMiNA Grandiflora, Dunal. Myers, Marco. Flatwoods. 

 Frequent, but only three specimens found in flower. 

 A small shrub about two feet high. 



Anona Laurifolia, Dunal. Myers (1). Aloug the banks 

 of the Caloosahatchee river. A small tree about eight 

 to ten feet high. In fruit. Fruits ovate, somewhat 

 unsymmetrical, about four inches long; green, more 

 or less distinctly facetted. 



Aroemone Leiocarpa, Greene. Myers. A weed along 

 streets. Only a few specimens observed. 



Lepidium Virginicum, L. Marco, Myers (2). A weed along 

 streets. Frequent but apparently common earlier in 

 the season. 



