PLANTS OF THE TRES MARIAS ISLANDS. 83 



Baubinia sp. 



Apparently belonging to the genus Bauhinia, but very unlike any of 

 tlie Mexican species with which I am familiar. A vine 6 to 9 meters 

 long; only in fruit. May 3 to 25 (No. 4300). 



Acacia sp. 



This appears to be an umlescribed species, of which I collected 

 specimens on the mainland. May 3 to 2.5 (No. 4188). 



Albizzia occidentalis Brandegee. 



Probably the above species, which is found in Lower California and 

 has been reported from western Mexico. May 3 to 25 (No. 4252). 



Pithecolobium dulce Bentli. 



Common in tropical Mexico and South America. Often cultivated. 

 May 3 to 25 (No. 4285). 

 Pithecolobium ligustrinum Klotzscli. 



Common in tropical Mexico and northern South America. Maria 

 Magdalena Isfaojd, May 26 to 28 (No. 4314). 



Conocarpus erectus L. 



Common throughout tropical America extending into Florida and 

 reported from tropical Africa. May 3 to 25 (No. 4220). 



Psidium sp. 



Tree G to 9 meters high; flowers white; called 'palo prieto.' This 

 species is not represented in the National Herbarium. May 3 to 25 

 (No. 4306). 



Casearia corymbosa ( ?) H. B. K. 



The Tres Marias specimens should probably be referred to this species 

 although our herbarium material seems to represent more than one 

 species. This form is common on the west coast of Mexico and Central 

 America. May 3 to 25 (Nos. 4270 and 4308). 



Casearia sylvestris Swartz. 



Widely distributed throughout tropical Mexico, South America, and 

 the West Indies. May 3 to 25 (No. 4241). 



Casearia sp. 



Maria Magdalena Island. May 26 to 28, 1897 (No. 4326), 



Passiflora sp. 



May 3 to 25 (No. 4249). 



Opuiitia sp. 



May 3 to 25 (Nos. 4263 and 4286). 



Gilibertia insularia Rose, sp. nov. 



Tree 6 to 12 meters high; leaves 25 to 35 cm. long, including the 

 slender petioles (7 to 18 cm. long), 9 to 20 cm. broad, entire or 31obed, 

 oblong, rounded at base, rounded at apex or with a short acumination, 

 glabrous, 3-uerved at base; fruiting inflorescence a short dense panicle; 



