230 CONTRIBUTIONS FROM THE NATIONAL. HERBARIUM. 



41. Phoradendron peninsulare Trel. Gen. Phorad. 50. pi. 55. 1916. 

 Baja California ; type from Cape San Lucas. 



Leaves 1.5 to 3 cm. long, very obtuse; spikes 1 to 2 cm. long. 

 According to Trelease, this may be the pistillate form of P. digiietii. 



42. Phoradendron palmeri Greenm. Proc. Amer. Acad. 40: 28. 1904. 

 Known only from the type locality, AlvS-rez, San Luis Potosf ; on Quercus. 

 Leaves 2 to 3.5 cm. long, obtuse ; spikes 0.5 to 2 cm. long. " Ingerto de 



encina." 



43. Phoradendron mazatlanum Trel. Gten. Phorad. 47. pi. ^8. 1916. 

 Known only from the type locality, Mazatlan, Sinaloa. 



Leaves spatulate-oblong, 3.5 to 4.5 cm. long ; spikes 2 cm. long. 



44. Phoradendron g-lobuliferum Trel. Gen. Phorad. 48. j)l. 51. 1916. 

 Vicinity of Guaymas, Sonora. 



Leaves elliptic-obovate, very obtuse, 2 cm. long ; spikes 0.5 to 2 cm. long. 

 Perhaps not distinct from the next species. 



45. Phoradendron brachystachyum. (DC.) Nutt. Journ. Acad. Phila. II. 1: 185. 

 1847. 



Viseum brachystachyum DC. Prodr. 4: 280. 1830. 



Sonora to Tamaulipas, Veracruz, and Oaxaca ; type collected between Tampico 

 and Real del Monte; on Arbutus, Quercus, Jacqttinia, Guaiacum, etc. 



Leaves oblong-lanceolate to orbicular, very variable, 1.5 to 5 cm. long; spikes 

 1 to 1.5 cm. long. 



46. Phoradendron tlacolulense Loes. Bull. Herb. Boiss. 2: 53G. pi. 20. 1894. 

 Oaxaca ; type from Mitla. 



Leaves orbicular or obovate, 1 to 2 cm. long ; spikes 5 mm. long. 



47. Phoradendron aureum Trel. Gen. Phorad. 49. pi. 52. 1916. 

 Known only from the type locality, Santa Cruz, Baja California. 

 Leaves 1 to 2 cm. long, short-petiolate ; spikes 1 to 1.5 cm. long. 



48. Phoradendron diguetii Van Tiegh. Bull. Mus. Hist. Nat. 1 : 31. 1895. 

 Phoradendron brachyphyllum Trel. Gen. Phorad. 49. pi. 53. 1916. 

 Phoradendron tumidum Trel. Gen. Phorad. 49. pi. 53. 1916. 

 Phoradendron saccatum Trel. Gen. Phorad. 50. pi. 55. 1916. 



Baja California ; on Quercus, Yeatchia, Jatropha, etc. 

 Leaves 3 cm. long, short-petiolate ; spikes 1.5 cm. long. 



49. Phoradendron robinsoni Urban, Bot. Jahrb. Engler 23: Beibl. 5: 4. 1897. 

 Puebla and Guerrero ; type from TehuacS-n, Puebla ; on Celtis. 



Leaves oblanceolate or obovate, very obtuse, petiolate ; spikes 2 to 8.5 cm. 

 long. 



50. Phoradendron coryae Trel. Gen. Phorad. 43. pi. j^-i- 1916. 

 Phoradendron loilkinsoni Trel. Gen. Phorad. 44. pi. If5. 1916. 



Chihuahua to Baja California. Western Texas to Arizona ; type from Chiri- 

 cahua Mountains, Arizona. On Quercus. 



Leaves 1.5 to 3.5 cm. long, short-petiolate; spikes 1.5 to 2 cm. long; fruit 

 white. 



51. Phoradendron tomentosum (DC.) Oliver, Nat. For. Kjobenhavn Vid. Medd. 

 1864: 176. 1864. 



Yiscum tomentosum DC. Prodr. 4: 670. 1830. 



Viseum villosum Nutt. ; Torr. & Gray, Fl. N. Amer. 1: 654. 1840. 



Phoradendron villosum Nutt. Journ. Acad. Phila. II. 1: 185. 1848. 



Phoradendron puberulum Trel. Gen. Phorad. 42. pi. 43. 1916. 



Chihuahua to Baja California and Hidalgo; type from "Real de Catone." 

 California and Oregon. On Celtis, Prosopis, Quercus, Platanus, Acacia, Aescu- 

 lus, Arctostaphylos. Popuhis, Rhus, Robinia, Salix, etc. 



