STANDLEY TREES AND SHRUBS OF MEXICO. 1287 



5. Lycium umbellatum Rose, Contr. U. S. Nat. Herb. 1: 74. 1890. 

 Baja California ; type from La Paz. 



Shrub, 2 to 3.5 meters high, unarmed or with spinose branchlets; leaves 

 1.5 to 3 cm. long, obtuse or rounded at apex, short-petiolate, viscid-puberulent ; 

 flowers long-pedicellate; calyx 6 to 8 mm. long, tubular; corolla purple, 1.5 

 cm. long. 



6. Lycium gracilipes A. Gray, Proc. Amer. Acad. 12: 81. 1877. 

 Northern Sonora. Arizona ; type from WiUiams Fork. 



Leaves 1 to 2 cm. long, obtuse, attenuate to base, viscid-puberulent ; flowers 

 long-pedicellate; calyx tubular-campanulate, 6 mm. long; corolla about twice 

 as long as the calyx, purple or whitish, the lobes rounded. 



7. Lycium carinatum. S. Wats. Proc. Amer. Acad. 24: 65. 1889. 

 Sonora ; type from Guaymas. 



Thorny, glabrous shrub, about 1 meter high ; leaves linear-spatulate or nar- 

 rowly spatulate, 5 to 20 mm. long, obtuse; flowers slender-pedicellate; corolla 

 white, 4 to G mm. long. " Sal sieso " {Palmer). 



8. Lycium. geniculatum Fernald, Proc. Amer. Acad. 35: 566. 1900. 

 Oaxaca and Puebla ; type from Tehuacdn, Puebla. 



Spiny shrub ; leaves oblong or obovate, 2.5 cm. long or less, obtuse or acute, 

 very glaucous, slender-petiolate ; flowers in small terminal cymes, long-pedi- 

 cellate ; corolla 12 mm. long, the lobes cordate. 



9. Lycium richii A. Gray, Proc. Amer. Acad. 6: 46. 1862. 

 Lycium palmeri A. Gray, Proc. Amer. Acad. 8: 292. 1870. 

 Lycium pringlei A. Gray, Proc. Amer. Acad. 20: 305. 1885. 



Baja California, Sonora, and Sinaloa ; type from La Paz, Baja California. 

 Southern California. 



Spiny shrub, 1.5 to 2.5 meters high, finely puberulent throughout ; leaves 

 obovate or oblanceolate, usually about 1 cm. long, obtuse or acute, sessile or 

 nearly so; flowers short-pedicellate; calyx about 3 mm. long; corolla lilac, 8 

 to 10 mm. long; fruit red. " Frutilla " (Baja California). 



10. Lycium carolinianum Walt. Fl. Carol. 84. 1788. 



ILycium guadrifidum Sess6 & Moc. ; Dunal in DC. Prodr. IS^: 513. 1852. 



In saline marshes or alkaline soil, Baja California, Michoacan, and Tamauli- 

 pas. Southern United States. 



Glabrous spiny shrub, the long branches trailing or subscandent; leaves 

 oblanceolate-oblong to linear-spatulate, 3 cm. long or less, obtuse or acute; 

 flowers slender-pedicellate; calyx irregularly lobate; corolla purple, the limb 

 subrotate, about 12 mm. broad. 



11. Lycium retusum Robins. & Fern, Proc. Amer. Acad. 30: 120. 1894. 

 Type from Oputo, Sonora. 



Shrub, 2 to 3 meters high ; leaves broadly obovate, 2 cm. long or less, petio- 

 late, rounded or retuse at apex, cuneate at base; flowers slender-pedicellate; 

 calyx tubular, 5 mm. long, glandular-pubescent; corolla 8 mm. long. 



12. Lycium berlandieri Dunal in DC. Prodr. 13^: 520. 1852. 

 ILycium brevipes Benth. Bot. Voy. Sulph. 40. 1844. 



Lycium scnticosum Miers, Ann. Mag. Nat. Hist. II. 14: 138. 1854. 



Lycium stoUdum Miers, Ann. Mag. Nat. Hist. II. 14: 191. 1854. 



Baja California to Nuevo Le6n and Hidalgo. Western Texas ; type from 

 San Antonio. 



Spiny shrub, 1 to 2.5 meters high; leaves linear-spatulate, obtuse, about 1 

 cm. long; flowers on long or short pedicels. " Cilindrillo " (Coahuila). 



