1116 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Pedicels sericeous or tomentulose. 



Flowers long-pedicellate, the pedicels more than twice as long as the 



caljrx ; leaves 1.5 cm. long or smaller 7. B. occidentalis. 



Flowers short-pedicellate, the pedicels usually less than twice as long 

 as the calyx ; leaves mostly larger. 

 Flowers nearly sessile in anthesis, the pedicels usually shorter than 



the calyx 8. B. retusa. 



Flowers pedicellate, the calyx usually equaling or longer than the 

 calyx. 



Leaves mostly 1.5 to 3 cm. long, pale beneath 9. B. brandegei. 



Leaves mostly 4 to 5.5 cm. long, not pale beneath. 



10. B. socorrensis. 

 Leaves oblong to oval or elliptic, broadest at or below the middle, usually 



obtuse or rounded at base. 

 Petioles much longer than the pedicels, usually more than twice as long. 



11. B, laetevirens. 

 Petioles equaling or usually shorter than the pedicels. 



Pedicels densely ferruginous-sericeous 12. B. persimilis. 



Pedicels glabrous or nearly so 13. B. peninsularis. 



1. Bumelia eriocarpa Greenm. & Conz. Field Mus. Bot. 2: 334. 1912. 

 Oaxaca ; type from Cerro San Antonio, altitude 1,700 meters. 



Leaves short-petiolate, oblong or lance-oblong, 5 to 10 cm. long, 2 to 3.5 cm. 

 wide, obtuse or roimded at apex, acute nt base, thick-coriaceous, tomentulose 

 or glabrate above, densely tomentose beneath ; pedicels much shorter than the 

 petioles, tomentose; fruit globose-ellipsoid, about 2 cm. long; seed 1.6 cm. long. 



2. Bumelia lanuginosa (Michx.) Pers. Syn. PI. 1: 237. 1805. 

 Sideroxylon lamtginosum Michx. Fl. Bor. Amer. 1: 122. 1803. 

 Bumelia lanuginosa rigida A. Gray, Syn. Fl. 2*: 68. 1878. 

 Bumelia rigida Small. Bull. N. Y. Bot. Gard. 1: 444. 1900. 

 Coahuila and Nuevo Le6n. Southern United States. 



Tree, sometimes 20 meters high, with a trunk 1 meter in diameter, but 

 usually much smaller, the branchlets spinose; bark dark grayish brown, deep- 

 ly fissured into scaly ridges; leaves short-petiolate, oblong, cuneate-obovate, 

 iiT oblong-oblanceolate, 2.5 to 8 cm. long, obtuse, brown-tomentose beneath or 

 finally glabrate; pedicels about as long as the petioles; sepals 3 mm. long; 

 fruit oval or obovoid, black; wood hard, close-grained, brown or yellowish, its 

 specific gravity about 0.65. "Coma" (Texas). 



The tree is known in Texas as " shittimwood " and " chittimwood." The 

 wood is sometimes used for cabinet work and tool handles. The flowers are 

 white and very sweet-scented. From the bark there exude drops of a gum. 

 which is often chewed by children, who call it " chicady," this, according to 

 Mackensen,! being probably a corruption of " chicle." The gum is known also 

 as " gum elastic." The fruit is edible but not very palatable. 



3. Bumelia subsessiliflora Hemsl. Biol. Centr. Amer. Bot. 2: 299. 1881. 

 Type from Guadalajara, Jalisco, altitude 900 meters. 



Shrub, the branches armed with stout axillary spines 12 mm. long; leaves 

 short-petiolate, oblong, 5 to 10 cm. long, 2 to 3 cm. wide, obtuse at each end, 

 ferruginous-puberulent or glabrate, coriaceous, lustrous above; sepals ferru- 

 ginous-hirsute . 



The writer has seen no material of this species. 



^ The trees and shrubs of San Antonio and vicinity. 1909. 



