1114 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Appendages of the corolla none. 



Ovary 10 to 12-celled; flowers solitary in the leaf axils 4. ACHBAS. 



Ovary 4 to 5-celled ; flowers usually fasciculate in the axils, or lateral. 



Sepals 8 to 10 5. CALOCARPUM. 



Sepals 4 to 6. 



Endosperm none; flowers axillary 6. IiUCUMA. 



Endosperm abundant ; flowers usually lateral on old wood. 



7. SrDEBOXYIiOm 



1. CHRYSOPHYLLUM L. Sp. PI. 192. 1753. 



Trees with milky juice; leaves with numerous close parallel lateral nerves, 

 estipulate; flowers fasciculate at the nodes or in the axils, pedicellate; sepals 

 .1 or G; corolla tubular-campanulate, the limb 5 or 6-lobate; staminodia none; 

 ovary 4 to 11-celled ; fruit baccate or drupaceous. 



Flowers small, about 2 mm. long; corolla glabrous 1. C. mexicanum. 



Flowers larger, about 4 mm. long; corolla sparsely or densely sericeous. 

 Leaves glabrous on the upper surface ; fruit containing several seeds. 



3. C. cainito. 

 Leaves ferruginous-tomentulose on the upper surface; fruit 1-seeded. 



3. C. tepicense. 



1. Chiysophyllum mexicanum T. S. Brandeg., sp. nov. 



Oaxaca, Veracruz, and Yucatan ; type from Zacuapau, Veracruz (Purpus 

 7679; U. S. Nat. Herb, no 877540). Also in El Salvador. 



Petioles 5 to 10 mm. long; leaf blades oval to oblong-elliptic, 5.5 to 12 cm. 

 long, 2.5 to 5 cm. wide, obtuse to short-acuminate, obtuse or acute at base, vi'ith 

 very numerous close straight lateral nerves, glabrous above, sericeous beneath, 

 the hairs closely appressed, dense or sparse, grayish or brownish, lustrous; 

 flowers 5-parted, few or numerous, the pedicels 3 to 5 mm. long ; sepals orbicular, 

 about 1 mm. long, sericeous; corolla 1.5 to 2 mm. long, glabrous; fruit 1-seeded. 

 " Caimito," " zapote caimito," " canela," " palo de canela " (Oaxaca); "za- 

 poyillo," "guayabillo" (El Salvador). 



This has smaller flowers than any of the West Indian species. Liebmann 

 308, Purpus 8038, and Gaumer 896 are referred here. Mature fruit has not been 

 seen. 



2. Chrysophyllum cainito L. Sp. PI. 192. 1753. 



Yucatan; cultivated (?) in Guerrero. West Indies, Central America, and 

 Colombia. 



Tree, 8 to 15 meters high ; leaves oval or broadly elliptic to oblong, 7 to 15 

 cm. long, abruptly short-acuminate, bright green above, golden or brownish- 

 sericeous beneath, the pubescence very dense and lustrous ; flowers greenish ; 

 stigma 8 to 11-lobed ; fruit the size of an apple, globose, white to purple, with 

 milky sweet flesh, containing several large brown seeds. "Caimito" (Yucatan, 

 Guerrero, Central America, Cuba, Santo Domingo) ; " cayumito " (Yucatsin). 



The wood is said to be rather coarse and purplish gray, with a specific grav- 

 ity of 0.88 ; it is of little value. The star-apple is cultivated for its fruit, which 

 is highly valued in some parts of tropical America. The fruit is eaten raw. 

 The name star-apple is derived from the fact that when the fruit is cut trans- 

 versely, the seeds are seen to raidate like the points of a star. The tree is per- 

 haps not a native of Yucatan but only in cultivation there. 



