FEB. 1907. FLORA SAND KEYS OF FLORIDA MILLSPAUGH. 207 



MARQUESAS "A" 

 MARCH 10, 1904 



Ambrosia hispida (2104) 

 Andropogon glomeratus (2123) 

 "f Avicennia nitida (2101) 

 < Borrichia arborescens (2109) 

 2 Caesalpinia crista (2103) 

 A Cakile fusiformis (2110) 

 Calonyction album (2121) 



Cyperus brunneus (2122) 

 TTt Dondia linearis (2100) 

 Erithalis fruticosa (2119) 



Euphorbia buxifolia (2113) 

 <y Euphorbia havanensis (2115) 

 6 Flaveria linearis (2117) 



n. 



Hymenocallis caribaea (2120) 

 Iva imbricata (2124) 

 Laguncularia racemosa (2102) 

 Lantana involucrata (2III, 2114) 

 Melanthera nivea (2116) 

 Paspalum distichum (2125) 

 Pithecolobium guadalupense (2105, 



2106) 



Rhizophora mangle (2099) 

 Sesuvium portulacastrum (2118) 

 Suriana maritima (2108) 

 Tournefortia gnaphalodes (2107) 

 Uniola paniculata (2112) 



This islet, the most western of the Marquesas group, is semilunar 

 in outline with the concavity looking substantially inward. It is of 

 clear sand, about 1.5 miles long and 300 feet wide, and has an elevation 

 of about 3.5 feet maintained throughout its central line of length. 

 The northern horn of the crescent is a sloping sand spit; while the 

 southern gradually merges into the mangroves that completely border 

 the concave western side. The unbroken eastern convex strand is 

 very narrow and is backed at the wash line of the waves with an almost 

 continuous strip of Sesuvium. The mangrove association is almost 

 pure, having only a few Avicennias at its northern extremity and nearby, 

 to the south of these, a small number of Erithalis shrubs. 



The central portion of the islet, a sandy plain, is almost covered 

 with a quite close growth of Uniola intermingled with the islet's com- 

 plete flora as listed above. The vegetable peculiarities of this coloni- 

 zation are: The comparatively few shrubs of Suriana; the localized 

 lines of Ambrosia and Paspalum; the confinement of Euphorbia buxi- 

 folia, Calonyciion and Flaveria to the lower half of the islet when evidently 

 the conditions are the same throughout; and the general scattered 

 arrangement of the balance of the species. The unicate vegetation 

 consists of Caesalpinia, Dondia, and Laguncularia, all on the northern 

 half. 



