180 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



1. Phoradendron juniperinum Engelm. Mem. Amer. Acad. n. ser. 4: 58. 1849. 



Juniper mistletoe. 



Type locality: "Parasitic on the two kinds of shrub cedar (Juniperus) which 

 grow on the hills and elevated plains about Santa Fe, and on no other tree." Type 

 collected by Fendler (no. 281). 



Range: Oregon and California to Colorado and Texas, southward into Mexico. 



New Mexico: Coolidge; Santa Fe; Canjilon; Magdalena; Mogollon Mountains; 

 Burro Mountains; Fort Bayard; "White Mountains; Queen; Albuquerque; mountains 

 west of San Antonio; Cedar Ilill; Tunitcha Mountains; Carrizo Mountains; Tierra 

 Amarilla. On species of Juniperus. 



The berries are handsome, but the plant is not suitable for decorative purposes 

 because of the lack of leaves. 



2. Phoradendron bolleanum (Seem.) Eichl. in Mart. Fl. Bras. 5 2 : 134. 1868. 

 Viscum bolleanum Seem. Bot. Voy. Herald 295. pi. 63. 1856. 

 Phoradendron pauciflorum Torr. U. S. Rep. Expl. Miss. Pacif. 4: 134. 1856. 

 Type locality: " Sierra Madre, " Mexico. 



Range: California to southern New Mexico, south into Mexico. 

 New Mexico: Carrizalillo Mountains; San Luis Mountains; near Dog Spring. On 

 species of Juniperus. 



3. Phoradendron orbiculatum Engelm. Mem. Amer. Acad. n. ser. 4: 59. 1849. 

 Phoradendron flavescens orbiculatum Engelm. Bost. Journ. Nat. Hist. 6: 212. 1850. 

 Type locality: "On different species of Quercus; on Q. nigra, sterile hills of 



Arkansas (Engelm.); on several oaks, San Felipe, Texas (Lindheimer) ." 



Range: New Jersey to Missouri, Texas, and Arizona. 



New Mexico: Fort Bayard; Berendo Creek; Dona Ana and Organ mountains; 

 San Luis Mountains; Dog Spring; Magdalena; Guadalupe Mountains. Usually on 

 oaks. 



This species, so far as we have seen it, is found upon nothing but oaks. It differs 

 from the following species chiefly in the different form of its leaves, brighter green 

 color, smaller size, and more abundant pubescence. It occurs, as do its hosts, only 

 in the mountains and foothills, never coming down into the valleys. Two of our 

 specimens, one from the Organ Mountains and one from Berendo Creek, have nar- 

 rower, lanceolate or elliptic, acutish leaves. Possibly they represent a different 

 species. 



4. Phoradendron macrophyllum (Engelm.) Cockerell, Amer. Nat. 34: 293. 1900. 

 Phoradendron flavescens macrophyllum Engelm. in Wheeler, Rep. U. S. Surv. 100th 



Merid. 6: 252. 1878. 



Type locality: "They grow on soft woods (Ash, AVillow, Poplar, Sycamore, and 

 Sapindus) on the Gila and Benita Rivers, and extend into Southern California." 



Range: Western Texas to Arizona and California. 



New Mexico: Mangas Springs; Silver City; Rincon; Mesilla Valley. On various 

 ti'ees and shrubs. 



The species is very abundant in the southern and southwestern parts of the State, 

 especially in the Rio Grande Valley, growing chiefly on the valley cottonwood (Popu- 

 lus wislizeni), although it has been found on the tornillo and on cultivated plums. 

 So heavily loaded are the cottonwood trees at times that they appear to have as dense 

 foliage in winter as in summer. Of course the trees soon succumb to such exhaustive 

 attacks by the pest. The Spanish name is "muerdago." 



This is the species preferred for commercial purposes. It is superior to P. orbicu- 

 latum because of its larger size, more abundant, larger berries, and generally hand- 

 somer appearance. 



