114 



occurs even at Zacapa, a locality noted for its extreme aridity. 

 The two other species require more warmth and moisture, and 

 have therefore a more limited hypsimetrical range . Of ^ . sphœro- 

 cephala I am unable to speak from much personal observation, 

 but A. cornígera will, I believe, be rarely found above an altitude 

 of 1,200 ft. I have already mentioned the fact that it and 

 A . hindsii often flourish side by side. This is the case at Escuintla 

 and along the piece of the Panamerican Railway connecting Santa 

 Maria and Patulul. As Belt observed, the acacias do not grow 

 in the forests, but only in the open country or savannahs and 

 along road-sides. They spring up readily in clearings, as one 

 may observe at Quirigua,in the banana plantations of the United 

 Fruit Company. The general distribution of these plants in 

 Central America and Mexico can be inferred from the following 

 list of localities compiled from the literature, and from specimens 

 in the Gray Herbarium and in my own collection : 



Acacia cornígera L. ( = spadicigera Schlechtendal and Cha- 

 misso). " Cuernezuela," " Torero," " Palin," " Hoitzmamaxalli." 



Colombia : Carthagena (Jacquin). 



Panama : (Cuming) Bentham. 



Costa Rica : Alajuela (J. D. Smith), Gray Herb. ; Nicoya 

 (H. Pittier), Gray Herb. 



Nicaragua : Matagalpa (Thos. Belt). 



Guatemala : Escuintla, i,ioo ft. (J. D. Smith), Gray Herb. ; 

 Escuintla and Santa Maria to Patulul, 413 to i,iii ft. ; Los 

 Amates, Iguana, and Quirigua (W. M. Wheeler). 



Mexico : Cozumel L, Yucatan (Kew Gardens), Gray Herb. ; 

 Merida and Xcholac, Yucatan (CF. Millspaugh) ; Vera Cruz 

 (Houstoun), Bentham ; Laguna Verde, Vera Cruz (Schiede), 

 Schlechtendal and Chamisso ; San Francisco, near Vera Cruz 

 (C. L. Smith), Gray Herb. ; Los Cocos, Vera Cruz (A. Petrunke- 

 witch), Amer. Mus. Coll. ; Jalapa (Rangel), Amer. Mus. Coll. ; 

 Las Palmas, San Luis Potosi (C. G. Pringle), Gray Herb. ; 

 Huasteca (L. V. Ervendberg), Gray Herb. 



Acacia hindsii Bentham. 



Guatemala : Zacapa and Quirigua, Escuintla and Santa 

 Maria to Patulul, Llano, Pahn, Amatitlan, Eureka, 4,686 ft.;. 



