718 CONTRIBUTIONS FROM THE NATIONAL. HERBARIUM. 



Baja California to Chihuahua, Zacatecas, Hidalgo, and Oaxaca; type from 

 " Gasave." Western Texas. 



Shrub, 1.5 to 2.5 meters high, densely branched, the branches green, spinose, 

 glabrous or pubescent ; stipules persistent ; flowers small, fasciculate in the 

 axils; calyx 5-lobate; petals 5, spatulate, cucuUate; fruit drupaceous, coriace- 

 ous, 3-celled. " Junco " (Durango). 



Adolphia californica S. Wats.* has been reported from Mexico and may occur 

 in northern Baja California. It is not certain that it is specifically distinct 

 from A. infesta. 



7. CORMONEMA Reissek ; Endl. Gen. PI. 1098. 1840. 



Shrubs or small trees, armed with spines; leaves alternate, entire, petiolate, 

 the blade with 2 glands on the under surface near the base; flowers axillary, 

 solitary or fasciculate, pedicellate ; calyx 5-lobate ; petals 5, cucullate, clawed ; 

 stamens 5 ; fruit drupaceous, 3-celled, the cocci crustaceous. 



Leaves acuminate at apex, acute at base 1. C. mexicana. 



Leaves rounded or vary obtuse at apex and usually retuse, rounded or obtuse at 

 base 2. C. biglandulosa. 



1. Corm^onema mexicana Rose, Contr. U. S. Nat. Herb. 3: 315. 1895. 

 Known only from Tepic, the type locality. 



Tree, 3.5 meters high, the trunk 12 cm. in diameter; leaves oblanceolate or 

 oblanceolate-elliptic, 7 to 15 cm. long, nearly glabrous, the glands borne at the 

 base of the blade adjacent to the petiole ; fruit about 1 cm. in diameter. 



2, Cormonema biglandulosa (Sesse & Moc.) Standi. 

 Rhamnus l>iglandulosa Sess6 & Moc. PL Nov. Hisp. 38. 1887. 

 Cormonema nelsoni Rose, Contr. U. S. Nat. Herb. 3: 315. 1895. 

 Sinaloa to Guerrero ; type from Apatzingan, Guerrero. 



Shrub or tree, 2 to 7 meters high ; leaves suborbicular to elliptic, 3 to 7.5 cm. 

 long, glabrous or nearly so, the glands borne on the margin of the blade remote 

 from the petiole ; flowers greenish yellow, densely glomerate, pubescent ; fruit 

 6 mm. in diameter. " Alezuilla " (Sinaloa). 



8. COLUBRINA L. Rich.; Brongn. Ann. Sci. Nat. 10: 368. 1827. 



Shrubs or trees, unarmed; leaves alternate, petiolate, entire or serrate, 

 usually 3-nerved ; flowers axillary, cymose or fasciculate, greenish ; calyx 

 5-lobate ; petals 5, cucullate, clawed ; stamens 5 ; fruit drupaceous, 3-coccous, the 

 cocci membranaceous or crustaceous. 



The bark of some the West Indian species is reported to be bitter and to 

 have antiscorbutic, stomachic, tonic, laxative, febrifuge, and vermifuge proper- 

 ties. 



Leaves entire, pinnate-nerved, all or most of them less than 2 cm. long. 



1. C. glabra. 

 Leaves finely or coarsely serrate, 3-nerved at base, usually more than 2 cm. long. 

 Leaves coarsely, irregularly, and remotely serrate, the lower surface some- 

 times glabrous or glabrate. 

 Lower surface of leaves brown or ferruginous-tomentose — 2. C. ehrenbergii. 



Lower surface of leaves glabrous or glabrate 3. C. glomerata. 



Leaves finely, evenly, and closely serrulate, the lower surface tomentose or 

 densely pubescent. 



'Proc. Amer. Acad. 11: 126. 18776. 



