March, 1900. Plantve Utowan^e Millspaugh. 55 



A large mass of this species occupies the south center of Allison 

 Island where its ligneous stems and branches constitute the sole mate- 

 rial with which the colony of frigate-birds here construct their large 

 nests (1766). Quite a large area of the species occupies a partly bare 

 spot on the west center of Pajaros Island, which, though much fre- 

 quented by the frigate-bird, is not used as a nesting ground (1758). 

 A small number of scattered individuals are to be found on Perez 

 Island, which appears to be shunned by all the sea birds of the other 

 islands (1752). Chica Island, though much frequented by the frigate- 

 bird, failed to yield a single specimen of the plant. 



Tribulus cistoides Linn. Sp. PL 387. 



Prevalent upon the upper sands of the beach at Progreso, Yuca- 

 tan (1737), but especially so in the clear sand of the city lots. Care- 

 ful search of the Caymans, Isle of Pines, Cape Corientes and Cozu- 

 mel failed to reveal this species. Neither Mr. Fawcett nor Mr. 

 Hitchcock have found it on the Caymans, nor Dr. Gaumer on Cozumel. 



RUTACE.E. 



Esenbeckia pentaphylla (Macf.) Griseb. Fl. Br. W. I. 135. 



Galipea Macf. Woodlands near San Miguel, Cozumel (1475), in 

 fruit only. Leaflets 7.5 x 3.2 cm. mostly in threes, rarely in fives. 



Zanthoxylum emarginatum (Sw.) Sw. Fl. Ind. Occ. 1:572. 



Fagara Sw. Tobinia Desv. Sapindus Spinosus (Linn.) Rocky 

 woodlands near Spot Bay, Grand Cayman (1274). 



SIMARUBACE.F. 



Suriana maritima Linn. Sp. PL, 284. 



Islets in Hamilton Bay, Bermuda (69), shrubs, small clusters of 

 fruit very large. South shores of Culebras Island (644) and on 

 Ratones Island (655), Porto Rico. Shores of Santiago Bay, Cuba 

 (1022), fruit clusters meager. The Creek, Cayman Brae, leaves very 

 short, neither in flower nor fruit (1151); the plant is here called 

 "Juniper," and an infusion of the bark is drunk as a cure for tooth- 

 ache. Shore near Georgetown, Grand Cayman (1253) similar to the 

 plants of Cayman Brae. Rocky shores Pedernales Point, Isle of 

 Pines (1430), leaves short and broad, flowers small. East shore Coz- 

 umel (1587), branches nude, leaves in tufts at tips. Shore line of 

 Progreso, Yucatan (1649), very leafy. Fringing the open sea beach 

 of the west shore of Perez Island, Alacran Shoals (1748), low and 

 straggling. (See description of shoal in Part II of this publication.) 

 A single plant not over four years old at the southeast point of 

 Pajaros Island, left undisturbed. 



Alvaradoa amorphoides Liebm. Kjoeb. Vid. Med. 1853: 100. 



Woods near Spot Bay, Grand Cayman (1282), one tree only 

 noted, a female, about 25 feet high. Plentiful at Chichen Itza, 

 Yucatan, where it is called by the Yucatecans "Palo de Ormigas " 

 or "Wood of the Ants," and by the Mayas Xbexinic-che, conveying 

 the same idea. 



