STANDEE Y — TREES AND SHRUBS OF MEXICO. 713 



ovate to orbicular-ovate, 3 to 5 cm. long, rounded or obtuse at apex, entire or 

 remotely crenate, densely pubescent or nearly glabrous; cymes loug-peduncu- 

 late, equaling or longer than the leaves; fruit globose, red, about 1 cm. in 

 diameter. " Nanche de la costa " (Sinaloa) ; " amole dulee " (Oaxaca). 



The fruit of this and the next species is used as a substitute for soap in 

 washing clothes. 



2. Zizyphus mexicana Rose, Contr. U. S. Nat. Herb. 1: 315 1895. 

 Colima to Oaxaca ; type from Armeria, Coliraa. 



Tree, 4.5 to 7.5 meters high, glabrous throughout ; leaves mostly oblong, 

 3 to 7 cm. long, entire or crenate, reticulate-veined ; cymes umbelliform, few- 

 flowered, shorter than the leaves; fruit 12 to 15 mm. in diameter, globose. 

 "Amole " ( Colima ) . 



3. Zizyphus pedunculata (T. S. Brandeg.) Standi. 



Condalia pedunculata T. S. Brandeg. Univ. Calif. Publ. Bot. 3: 384. 1909. 



Type from Barranca de Tlacuilosto, San Luis Tultitlanapa, Puebla. 



Spiny shrub with brown branches; leaves mostly opposite, short-petiolate, 

 oblong to oval, bright green, rounded at apex, entire or nearly so, glabrate; 

 inflorescence few -flowered ; flowers about 5 mm. broad. 



Condalia seleri Loesener,^ described from Tecomavaca, Oaxaca, is apparently 

 a synonym, and it may be that both names refer only to a small-leaved form of 

 Z. mexicana. 



4. Zizyphus acuminata Benth. Bot. Voy. Sulph. 78. 1844. 

 Type from Acapulco, Guerrero. Costa Rica. 



Branches armed with short stout spines, brown ; leaves elliptic or oblong- 

 elliptic, 10 to 13 cm. long, serrate above, glabrous. 



3. MICRORHAMNUS A. Gray, PI. Wright. 1 : 34. 1852. 



1. Microrhamnus ericoides A. Gray, PI. Wright, 1: 34. 1852. 



Chihuahua, Coahuila, and Zacatecas. Western Texas ; type from valley of 

 Pecos River. 



Densely branched shrub, 0.5 to 1.5 meters high, glabrous, the branchlets 

 spinose; leaves alternate and fasciculate, linear or oblong, 3 to 6 mm. long, 

 persistent, the margins strongly revolute ; flowers yellow, pedicellate ; calyx 

 5-lobate ; petals 5, cucullate, clawed ; fruit an ovoid drupe, 5 to 7 mm. long, 

 1-celled. "Abrojo " (Durango) ; " tecomblate " (Durango, Chihuahua), 



4. CONDALIA' Cav. Anal. Cienc. Nat. 1 : 39. 1799. 



Shrubs or small trees, the branches usually spinose ; leaves alternate, pin- 

 nate-nerved, coriaceous, deciduous; flowers axillary, solitary or fasciculate; 

 calyx 5-lobate; petals 5 or none; stamens 5; fruit drupaceous, the stone 

 1-celled. 



Petals none. 



Leaves 5 to 15 mm. wide 1. C. obovata. 



Leaves less than 5 mm. wide. 

 Lateral nerves of the leaves very conspicuous beneath, broad and coarse. 



2. C. spathulata. 

 Lateral nerves slender and inconspicuous 3. C. mexicana. 



'Repert. Sp. Nov. Fedde 9: 355. 1911. 



'In honor of Antonio Condal, a native of Barcelona, who accompanied the 

 scientific expedition, under the direction of the Swedish botanist, Peter Loefling, 

 sent by the Spanish Government to explore its South American possessions. 



