64 MISSOURI BOTANICAL GARDEN. 
the roots and rise to the surface of the water or slightly 
above. They are usually less than an inch in diameter and 
do not taper, so that, in appearance, they resemble some- 
what the aerial roots of Rhizophora. 
It may be that their function is the same as that of the 
cypress knees. Besides the seedlings of the mangroves, 
there may be found along the edge of the water, Salivornia 
fruticosa, Statice Lefroyi, Sesuvium portulacastrum and 
Heliotropium curassavicum. Beyond tidewater Conocar- 
pus erectus, the sea mulberry, is abundant. Coccoloba 
uvifera, the sea-side grape, a large tree with broad glossy 
leaves and grape-like bunches of fruit, is also a common 
marginal form. Then appear’ Borrichia arborescens, 
Solidago sempervirens, Lantana odorata and Lantana 
Camara, forming the so-called Bermuda sage-brush. The 
cedar follows and the vegetation rapidly becomes that 
found on all the hillsides. 
