PLANTS OF THE TRES MARIAS ISLANDS. 83 



Bauhinia sp. 



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

 the Mexican species with which I ain familiar. A vine 6 to 9 meters 

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

 Acacia sp. 



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

 specimens on the mainland. May 3 to 25 (No. 4188). 

 Albizzia occideiitalis Brandegee. 



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

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

 Fithecolobium dulce Benth. 



Common in tropical Mexico and South America. Often cultivated. 

 May 3 to 25 (No. 4285). 

 Pithecolobium ligustrinum Klotzsch. 



Common in tropical Mexico and northern South America. Maria 

 Magdaleua Island, 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). 



Fsidium 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). 



Opuntia sp. 

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



Gilibertia insnlaris 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 3-lobed, 

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

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



