STANDLEY — TREES AND SHRUBS OF MEXICO. 715 



Shrub with stout spinose branchlets; leaves fasciculate, short-petiolate, the 

 blades oblong or elliptic, 6 to 12 mm, long, rounded at base and apex, entire or 

 nearly so, bright green and pubescent on both surfaces ; flowers fasciculate, the 

 slender pedicels 3 to 4 mm. long; calyx pubescent, the lobes deltoid; petals 

 equaling the calyx lobes. " Garrapata." 



6. Condalia obtusifolia (Hook.) Weberb. in Engl. & Prantl, Pflanzenfam. 3": 



404. 1895. 



Rhamnus obtusifolia Hook.; Torr. & Gray, Fl. N. Araer. 1: 685. 1840. 



Zizyphus obtusifolia A. Gray, Gen. Fl. Amer. 2: 170. 1849. 



Tamaulipas. Western Texas. 



Densely branched shrub with stout spinose branchlets, these covered with 

 pruinose flaky epidermis; leaves short-petiolate, ovate or elliptic, 6 to 20 mm. 

 long, obtuse or acute, thin, glabrate, entire or serrate ; inflorescence villosulous ; 

 fruit subglobose, black, 8 mm. in diameter. "Abrojo," " chaparro prieto " 

 (Tamaulipas). 



The fruit is edible but of poor quality. The roots are employed in Tamau- 

 lipas as a substitute for soap, and a decoction of them is applied to sores on 

 horses. 



7. Condalia lycioides (A. Gray) Weberb. in Engl. & Prantl, Pflanzenfam. 3': 



404. 1895. 



Zizyphus lycioides A. Gray, Bost. Journ. Nat. Hist. 6: 168. 1850. 



Baja California to Cliihualiua, Nuevo Leon, San Luis Potosi, and Zacatecas ; 

 type collected between Matamoros, Coahuila, and MapimI, Durango. Western 

 Texas to southern California. 



Densely branched shrub, 1 to 2.5 meters high, the branchlets spinose, whitish ; 

 leaves oblong, oval, or ovate, 5 to 25 mm. long, obtuse or rounded at apex, 

 entire or serrate, thin, pubescent or glabrate; fruit 6 to 8 mm. long, black. 

 " Clepe " (Tamaulipas); " crucillo " (Tamaulipas, Coahuila); "garrapata" 

 (Zacatecas); " barchatas " (Sonora) ; " garambuUo " (Durango, Patoni). 



The typical form is glabrate. C. lycioides canescens (A. Gray) Trel.* is a 

 form with pubescent leaves. C lycioides microphylla Loesener,' described 

 from Coahuila, is a form with small narrow leaves. The fruit is edible. The 

 root bark is used as a soap substitute. The Pimas of Arizona employed a 

 decoction of the root as a remedy for sore eyes. 



5. KARWINSKIA' Zucc. Abh. Akad. Wiss. Munchen 2 : 349. 1832. 



Shrubs or small trees ; leaves subopposite, sessile or petiolate, entire, pinnate- 

 nerved, pellucid-punctulate ; flowers axillary, solitary or in cymes or umbels ; 

 calyx 5-lobate, the lobes acute; petals 5, cucullate; stamens 5; fruit drupa- 

 ceous, apiculate, the stone 1 or 2-celled. 



^ In A. Gray, Syn. Fl. 1*: 403. 1897. Zizyphus lycioides canescens A. Gray ; 

 Rothr. in Wheeler, Rep. U. S. Surv. 100th Merid. 6: 82. 1879. 



' Repert. Sp. Nov. Fedde 8: 296. 1910. 



'The genus was named for Wilhelra Friedrich von Karwinski, a Bavarian, 

 who spent many years in Brazil. In 1826 he was sent by a society at Diissel- 

 dorf to Mexico to collect objects of natural history. He remained five years 

 in Mexico, most of the time in Oaxaca, although he collected also in Hidalgo 

 and probably in Mexico. He forwarded to Europe many living plants, espe- 

 cially Cactaceae and Agaves. In 1840 he revisited Mexico on behalf of the 

 Russian Government and obtained collections which were sent to St. Peters- 

 burg. He died at Munich in 1855. 



