BOEEALES FLAVESCENTES 29 



joint of the staminate spikes, specimens on Abies from the Sta. Catalina 

 Forest Reserve, Arizona ( J. S. Holmes, Aug. 7, 1906 ; Hedgcock & Long, 

 9720}. 



Phoradendron guadalupense n. sp. 



Not forked, the moderately long and lax branches without cataphyls, 

 dioecious. Internodes moderately short (2-4x10-15 mm.), slightly pa- 

 pillate. Leaves oblanceolate-spatulate, very obtuse, sessile, 5-8x15-30 

 mm. Spikes often clustered, rather long for the group (nearly 10 mm.), 

 smooth, with usually 2 or 3 joints 2-flowered when pistillate and about 

 6-flowered when staminate: peduncle 1-2 mm. long, sometimes bearing 

 flowers. Fruit?. Plates 22, 23. 



Western insular region of Mexico. The type from Guadalupe. 



Specimens examined: MEXICO. Guadalupe Island (Palmer, 85, 

 1875, the type : the host plant not noted). 



B. PLURISERIALES. 



Stems never winged. Spikes more or less elongated, 2- to 6-jointed, 

 each joint with 6 or more flowers mostly in 6 series. Berries globose or 

 ellipsoidal, smooth and in most species glabrous, moderately small (3 to 

 mostly 4 or 5 mm.), white or slightly tinged with greenish yellow. The 

 young growth at least is puberulent or hairy. Continental North Amer- 

 ica, centering about northern Mexico. 



Leaves never long, usually small ; shoots not flattened. 



Leaves moderate. Chiefly northern. FLAVESCENTES. 



Leaves small. Southern. BRACHYSTACHYAE. 



Leaves large and hairy. Southern. FERRUGINEAE. 

 Leaves long and relatively large. 



Shoots not flattened. VELUTINAE. 



Shoots compressed at nodes, LONGIFOLIAE. 



3. FLAVESCENTES. 



Leaves usually relatively broad, never large or greatly elongated, very 

 obtuse. Shoots, if evanescently somewhat square, neither acutely angled 

 nor much compressed. United States and adjacent Mexico. 

 Berries relatively large (4-5 mm.), glabrous except in the last group, 

 with sepals over one-half mm. long : leaves prevailingly oblanceolate. 

 Staminate spikes slender, the nearly glabrous few-flowered joints 2-7 

 mm. long. Eastern. 



Leaves prevailingly oblanceolate-obovate : rather stout. 



Fruiting spikes short (20-40 mm.) with crowded whorls of 

 berries. P. flavescens. 



