38 THE GENUS PHORADENDRON 
4259; Ferriss; Lloyd, 1907). Huachuca Mts. (Wilcox, 1892; Ferriss). 
Fort Verde (Mearns, 164). Tonto Basin (Тоитеу, 289). Sta. Cruz 
River (Pringle, 1884). Willow Springs Mts. (Griffiths, 3644). Dudley- 
ville (Griffiths, 3676). Rincon Mts. (Griffiths, 1797). Beaver Creek 
(MacDougal, 612). Dragoon Summit (Ебу). Oracle (Hedgcock d 
Long, 9692). Sedona (Hedgcock, 4924). “5 
An almost glabrous form, f. glabrata, occurs with the type in south- 
crn Arizona :—Dudleyville (Griffiths, 3674) ; Arabaea (Griffiths, 6144); 
Chirieahua Mts. ( Blumer, 1517, 1534, 1535; Burrall, 1126) ; on the Boun- 
dary, south of Bisbee (Mearns, 891); and from S. Pedro to Fronteras, 
Sonora, Mexieo (Hartman, 946). 
Phoradendron macrophyllum circulare n. var. 
Leaves round, small, 1.5-2 em. in diameter; otherwise resembling the 
type, with which it occurs.— Plate 35. 
Specimens examined :—UNITED STATES. Arizona. Sta. Rita Mts. 
(Griffiths & Thornber, 191,—the type). 
Phoradendron macrophyllum Jonesii n. var. 
Leaves oblanceolate-obovate, small, scarcely 1.5-2x3-4 em., resembling 
those of P. Engelmanni; the young growth yellowish- or gray-tomentose. 
In the region of the type.—Plate 35. 
Specimens examined:—Unirep STATES. ARIZONA. Bowie (Jones, 
4279,—the type; 4281,—in leaf-shape approaching var. circulare). 
+ Phoradendron Cockerellii n. sp. 
Not forked, the rather long and stout branches without cataphyls, 
dioecious. Internodes rather short (2-4x20-40 mm.), quickly glabrate 
like the foliage. Leaves broadly elliptical to oblanceolate, very obtuse, 
1.5-2x3.5-5.5 em., euneately subpetioled for 5-10 mm. Spikes mostly sol- 
itary, moderate (15-30, or lengthening to 40 or 50 mm.), glabrous, with 
about 4 joints clavately about 6-flowered toward the top when pistillate 
and ellipsoidal and 20- to 30-flowered when staminate: peduncle 4-5 mm. 
long: scales and receptacular eups ciliate. Fruit white, globose, glabrous, 
about 4 mm. in diameter, in distinct whorls: sepals glabrous, closely in- 
flexed.— Plates 5, 36. 
Southern Rocky Mountain region, characteristically on Populus and 
Salix, but also on Fraxinus.—The type from New Mexico. It was this 
New Mexican form which Professor Cockerell actually had before him 
when applying to the preceding species the binominal P. macrophyllum 
as a substitute for P. flavescens macrophyllum Engelmann. 
