MISTLETOE FAMILY 



533 



4. Phoradendron densum Torr. Dense Mistletoe. Fioj. 129L 



Phoradendron densum Torr.; Trel. Monogr. 

 Phoradendron 27. 1916. 



Plants much branched and dense, 10- 

 25 cm. high, the stem often 5-7 mm. 

 thick at base, glabrous, the internodes 

 10-15 mm. long, terete or nearly so. 

 Leaves obanceolate usually very obtuse, 

 9-15 mm. long, 4-6 mm. wide; spikes 

 sometimes clustered, about 3 mm. long, 

 1-2-jointed, the staminate about 12-flow- 

 ered; fruit straw-colored, subglobose, 

 about 4 mm. in diameter. 



Parasitic on Sabina and Cupressus; Lake 

 County, Oregon, south to San Diego County, 

 California, and Arizona. This species has been 

 confused with the Mexican species P. hoi- 

 leanum Eichler. Type locality: Mt. Shasta, 

 California. The plants on Cupressus usually 

 have larger leaves than those on Sabina and 

 are more or less intermediate between this 

 species and P. pauciflorum Torr. to which 

 Trelease refers them. 



5. Phoradendron pauciflorum Torr. Fir Mistletoe. Fig. 1292. 



Phoradendron pauciiioriim Torr. Pacif. R. Rep. 4: 

 134. 1857. 



Plants with stout, nearly terete stems and 

 branches, 20-30 cm. long, the main stem often 

 6-7 mm. thick at base, the internodes 15-40 mm. 

 long, glabrous, somewliat granular-varnished. 

 Leaves oblanceolate-elliptic, obtuse 20-35 mm. 

 long, 5-8 mm. wide; spikes mostly solitary, 4-5 

 mm. long and 1-jointed, or longer and 2-jointed; 

 joints of the staminate spikes about 8-flowered, 

 or sometimes more, those of the pistillate 2- 

 flowered; fruit straw-colored, subglobose, 4 mm. 

 in diameter. 



Parasitic on Abies concolor; Sierra Nevada, Cali- 

 fornia to Lower California and Arizona. Type local- 

 itv: Duffield's Ranch, Sierra Nevada, California. 



6. Phoradendron coloradense Trel. 

 Colorado Desert Mistletoe. Fig. 

 1293. 



Phoradendron coloradense Trel. Monogr. Phora- 

 dendron 39. 1916. 



Plants stout, 3-6 dm. high, with the in- 

 ternodes 3-4 cm. long, 5-6 mm. thick, mi- 

 nutely canescent, soon becoming glabrous. 

 Leaves oblanceolate-obovate, very obtuse, 

 3-6 cm. long, 15-25 mm. wide, glabrous, 

 cuneately petioled; spikes 3-5 cm. long, 

 glabrous, with about 3 joints, the pistillate 

 joints 6-flowered, the staminate 20-30-flow- 

 ered ; fruit white, subglobose, about 5 mm. 

 in diameter. 



Parasitic on Prosopis; desert regions of 

 southern California and Arizona, from The 

 Needles to Yuma. Type locality: Fort Yuma, 

 Arizona. 



