40 THE GENUS PHOEADENDBON 



Central California!! region, on Aesculus, Alnus, Fraxinus, Juglans, 

 Platanus, Populus, Robinia and Salix: apparently rarely on Quercus* 

 The type from California. 



Specimens examined: UNITED STATES. CALIFORNIA. Lake Co. 

 (Bolander, 2670). Sacramento River (Wilkes Expedition, 1316, the 

 type, as also of P. flavescens quinquenervium Torr. in herb.). Kaweah 

 (Hopping, 263). Visalia (Rattan, 1912). Araquipa Rancho (Jepson, 

 1S94). Vacaville (Jepson, 1894; Plait, 1894). Putah Creek (Steiger, 

 1894). Kern Co. (Grinnell, 399, 402). Ventura Co. (Abrams & Mc- 

 Gregor, 33, 49). Mendocino (Brown, 921). Chico (Griffiths, 1912). 

 San Gabriel (Brewer, 113). San Bernardino (8. B. & W. F. Parisli, 

 680). Lytle Creek Canon (Abrams, 2749; Spaulding, 299-301; Graves, 

 1697). Santa Monica Range (Hasse, 4626, 1889, 1893). Pasadena 

 (Jones, 3028, etc.). San Bernardino Co. (J. F. James, 1879). Los An- 

 geles Co. (Braunton, 792). San Diego Co. (Alderson, 705; Stokes, 1895). 

 Temecula (Leiberg, 3215). Claremont (Chandler, 1897). Without lo- 

 cality (Wright, 1853-6; Vasey, 1875, 1880). Mohave Desert (Saunders, 

 1906). ARIZONA. Sedona (Hedgcock, 4923). 



Phoradendron longispicum cyclophyllum n. var. 



Differs from the type, with which it occurs, in its smaller charac- 

 teristically orbicular leaves. 



Specimens examined: UNITED STATES. CALIFORNIA. Soland Co. 

 (Jepson, 1894, the type). 



PHORADENDRON VILLOSUM Nuttall. 



Plioradendron villosum Nuttall, Journ. Acad. Nat. Sci. Philadelphia, n. s. 

 vol. 1. p. 185. 1848. Cannon, Bull. Torr. Bot. Cl. vol. 28. p. 374. 

 pi. 27-28. 



P. flavescens villosum Engelmann in Rothrock, Bot. Wheeler, p. 252. 

 ( = Rothrock, Repts. upon the bot. collections, as vol. 6, Rept. U. S. 

 Geogr. Surv. ... in charge of G. M. Wheeler) 1878, as to the West- 

 Coast plant. 



Viscum villosum Nuttall in Torrey & Gray, Fl. vol. 1. p. 654. 1840. 



Not forked, the rather short stout branches without cataphyls, dioe- 

 cious. Internodes short (2-4x20-25 mm.), densely short- villous like the 

 foliage. Leaves oblanceolate-obovate, very obtuse, 1.5-2 or rarely 3 x3-4 

 or even 5 cm., cuneately subpetioled for 3-5 mm. Spikes often clustered, 

 short (10-15 mm., scarcely exceeding 20 mm. in fruit), short-villous, 

 with about 3 short swollen joints, some 6-flowered when pistillate and 



*See Hedgcock, Phytopathology, vol. 5. p. 178, for hosts possibly inclusive of 

 the following species. 



