NO. 2 GENTRY : LAND PLANTS 187 



Widely distributed in the tierra caliente from central Sinaloa, Mexi- 

 co to Brazil ; type from the Rio Amazon. 



During the arid spring when many plants are leafless through the 

 Pacific lowlands, this vine is conspicuous by its clusters of reddish fruits 

 and dissected, strongly crenate, lobed leaves. 



Sterculiaceae 



GuASUMA ULMIFOLIA Lam., Encycl. 3:52. 1789. 



Tenacatita Bay, Jalisco, May 8, Elmore 1A8, in dry open forest. 



Widely distributed in tropical and subtropical America from central 

 Sonora and Tamaulipas, Mexico to South America. 



The guazima tree is primarily a riparian dweller along the Pacific 

 tierra caliente from sea level up to 2500 to 3000 feet. It appears to re- 

 quire ground water either at high or low levels, at least in the more arid 

 climates as in Sonora, and grows readily in a wide variety of soils, coarse 

 or fine. In contrast to the trees of the slope forests, it carries its leaves 

 through most of the year, dropping them only at the height of the spring 

 dry season. Its apparent absence from the Cape District of Baja Cali- 

 fornia is rather puzzling, when so many of its mainland associates are 

 found there. 



WaLTHERIA AMERICANA L., Sp. PI. 673. 1753. 

 Chacagua Bay, Oaxaca, March 21, Elmore D7^ in dry, shaded, 

 sandy soil. 



Widely distributed in the warmer parts of both hemispheres. 



Waltheria Preslii Walp., Report. Bot. 1:340. 1842. 



Chacagua Bay, Oaxaca, March 21, Elmore DIO, in dry sandy soil 

 at 10 feet elevation, flowers yellow. 



Oaxaca to Guerrero along the southwest coast of Mexico ; type from 

 Acapulco, Guerrero. 



This plant has been collected rarely and the above collection is the 

 first cited from Oaxaca. 



TURNERACEAE 

 TURNERA ULMIFOLIA L., Sp. PL 271. 1753. 



Chacagua Bay, Oaxaca, March 21, Elmore D8, a few plants in dry 

 sandy soil at 10 feet elevation, flowers yellow. 



Widely distributed in tropical America; naturalized in the Old 

 World. 



