JOURNAL OF THEARNOLD ARBORETUMVOL. XXV APRIL, 1944 NUMBER 2 PLANTS OF COAHUILA, EASTERN CHIHUAHUA, AND ADJOINING ZACATECAS AND DURANGO, V1 IVAN M. JOINSTON LORANTHACEAEPhoradendron lanceolatum Engelm. Mem. Am. Acad. 4: 54 (1849). COAIUILA: Sierra Gloria, Marsh 1872; Ilillcoat Canyon, west of Buena Vista Ranch,July 13, 1938, Marsh 1332; Sierra Madera, Caiion Pajarito, on white oaks, Muller 3201. Known only from eastern Coahuila and northern Nuevo Leon. The typewas collected on Quercus by Gregg (no. 255), Feb. 11, 1847, at Rinconada,just east of the Coahuila-Nuevo Leon boundary along the road betweenSaltillo and Monterrey. The species is readily recognized by its veryelongate glabrous leaves 5-9 cm. long.Phoradendron tomentosum (DC.) Engelm. in Gray, Jour. Boston Soc. Nat. Hist. 6: 212 (1850). Viscum tomentosum DC. Prodr. 4: 670 (1830). Phoradendron Greggii Trel. Monog. Phorad. 36. t. 32 (1916). VERNACULAR NAME: Injerto. COAHUILA: Rancho Falcon, 12 mi. west of Berrendo, Wynd 732; Sierra Madera,Caion Pajarito, on Acacia and other legumes, Muller 3202; Puerto San Lazaro, Wynd& Mueller 133; Canion de Jara, on Acacia, Johnston 8838; 60 mi. west of CuatroCienegas, on Prosopis, While 1957; 5 mi. west of Americanos, on Prosopis, Muller 3292;east of San Antonio de los Alamos, on Prosopis, Johnston 8278; near Santa Elena,Sierra Cruces, on Forestiera, Johnston & Muller 229; 6 mi. northwest of El Oro, roadto Sierra Mojada, White 1976; 30 mi. south of Sierra Mojada, Wynd 770. ZACATECAS:Cedros, Lloyd & Kirkwood 15. This is the common Phoradendron, usually found on Prosopis and Acacia,in the broad valleys and in the lower canyons on the plateau of northernMexico, ranging from northern San Luis Potosi and Zacatecas north intotrans-Pecos Texas. The type was collected in Dec. 1827 "supra Mimoseas"by Berlandier (no. 1364) near Catorce in northern San Luis Potosi.Phoradcndron Greggii, based upon collections from Prosopis and other 1The third paper in this series, in which the treatment of the monocotyledons wascompleted, appeared in Jour. Arnold Arb. 25:43-83 (Jan. 1944). The fourth part,covering the families Saururaceae to Urticaceae, will appear later this year.
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