STANDLEY TREES AND SHRUBS OF MEXICO. 689 



short, adnate to the corolla, the anthers oblong, 2-celled, dehiscent by lateral 

 slits ; pistillate calyx 4-lobate ; ovary 1-celled ; fruit drupaceous, large, globose 

 or ovoid, with thin flesh, the putamen osseous, bicristate and w^ith numerous 

 irregular dentate crests over the whole surface. 

 One other species is known, a native of Costa Rica. 



Leaves densely pubescent beneath 1. C. mollis. 



Leaves glabrous beneath or nearly so 2. C. laevigata. 



1. Calatola mollis Standi., sp. nov. 



Puebla; type from Zacatlan (F. Salazar, April 3, 1913). 



Tree, about 20 meters high ; leaves oval-elliptic to oblong-obovate, 20 to 30 cm. 

 long, acute or abruptly short-acuminate, obtuse or rounded at base ; staminate 

 spikes 8 to 20 cm. long; corolla 2 mm. long; fruit 5 to 5.5 cm. long, 4 to 4.5 cm. 

 thick, densely tomentose. " Nuez de calatola," " calatolazno " (tree), "colas 

 de ratas " (spikes). 



The seeds are said to have vomitive-purgative properties. 



2. Calatola laevig'ata Standi., sp. nov. 



Oaxaca ; type from Cafetal San Carlos, Cerro Espino, altitude 800 meters 

 (Reko 3440; U. S. Nat. Herb. no. 988705). 



Leaves oblong or elliptic-oblong, 11 to 16 cm. long, acute, obtuse or acute 

 at base ; staminate spikes 4 to 6 cm. long or larger ; pistillate flowers in short 

 dense spikes ; young fruit glabrate. " Palo de tinta." 



2. MAPPIA Jacq. PI. Hort. Schoenbr. 1: 22. 1797. 

 1. Mappia mexicana Robins & Greenm. Amer. Journ. Sci. 50: 150. 1895. 



Tamaulipas and San Luis Potosi; type from Micos, San Luis Potosi. 



Shrub, 1.5 to 3 meters high ; leaves short-petiolate, oblanceolate or oblong- 

 obovate, 7.5 to 10.5 cm. long, obtuse, cuneate at base, glabrous ; flow^ers in 

 long-pedunculate cymose panicles ; calyx minutely pubescent ; petals 2.5 mm. 

 long ; fruit black, 1.5 cm. long. 



3. OECOPETALUM Greenm. & Thomps. Ann. Mo. Bot. Card. 1 : 408. 1914. 



A single species is known. 

 1, Oecopetalum mexicanum Greenm. & Thomps. Ann. Mo. Bot. Gard. 1: 408. 

 pi. 25. 194. 



Type from mountains near Misantla, Veracruz. 



Leaves short-petiolate, oblong or elliptic-oblong, 10 to 25 cm. long, short- 

 acuminate, acute at base, entire, glabrous or nearly so ; flowers in axillary 

 pedunculate pubescent cymes ; calyx tomentose, the lobes ovale, obtuse ; 

 petals 8 mm. long ; ovary glabrous. 



87. ACERACEAE. Maple Family. 



1. ACEB L. Sp. PI. 1054. 1753. 



Trees or shrubs; leaves opposite, simple or pinnate, deciduous, petiolate; 

 flowers unisexual, dioecious or polygamo-dioecious ; calyx 4 or 5-lobed or parted ; 

 petals as many as the calyx lobes or none ; stamens 4 to 12 ; fruit of 2 large 

 united samaras. 



Some of the maples make excellent shade trees and they are often cultivated 

 for this purpose. One European species, A. pseudoplatanus L. (" sicomoro "), 

 the sycamore maple, is said to be grown in Mexico. In most of the American 

 species of the genus the sap is sweet, and by evaporation this yields maple 

 sugar, an article well known to the Indians of North America, and still har- 

 vested in large quantities in the United States each year. 

 7808—23 12 



