FEB. 1907. FLORA SAND KEYS OF FLORIDA MILLSPAUGH. 221 



MARQUESAS "H," OR ROUND ISLAND 

 MARCH 12, 1904 



^ Atriplex cristata (2246) 



| Avicennia nitida (2242) 



< Borrichia arborescens (2248) 



A Cakile fusiformis (2250) 



TU, Dondia linearis (2249) 



Euphorbia buxifolia (2247) 



n Laguncularia racemosa (2241) 



Melanthera nivea (2251) 



K Rhizophora mangle (2245) 



sO: Salicornia ambigua (2243) 



-^ Sesuvium portulacastrum (2252) 



G Sporobolus purpurascens (2244) 



f Suriana maritima (2240) 



This small key, about 1200 feet in area, is distinctive in having 

 its plateau, about 3 feet in elevation, absolutely barren of vegetation, 

 having as yet formed no Uniola association, the Euphorbia element 

 being turned over to the Sesuvium border on the abrupt south beach. 

 In the pasty mud at the base of the slope to the Rhizophora swamp, 

 close to the mangroves themselves and between therti and the usual 

 Laguncularia, is an incipient salina strip devoted solely to Salicornia 

 bordered on the landward side by Sporobolus purpurascens. None of 

 the other elements of the vegetal association is particularly unique. 



