Part 2, 1907] UREDINACEAE 101 
Salix exigua Nutt., Washington. 
Salix Fendleriana Anders., Utah, Washington. 
Salix fluviatilis Nutt., Montana, Wyoming. 
Salix Geyeriana Anders., Colorado. 
Saliz glauca ,., Colorado. 
Salix glaucops Andetrs., Colorado; Alberta, 
Salix Humboldtiana Willd., Guatemala. 
Salix interior Row). (S. longifolia Muhl.), Indiana. 
Salix irrorata Anders., Colorado. 
Salix lastandra Benth., California. 
Salix longipes Shuttlw. (S. Wardii Bebb), Florida, Indiana. 
Salix lucida Muhl., Maine. 
Salix lutea Nutt., Montana, Wyoming. 
Salix luteosericea Rydb., lowa, Kansas, Montana. 
Salix Mackenzieana Barratt, Alberta. 
Salix melanopsis Nutt., Montana. 
Salix missouriensis Bebb, Kansas. 
Salix myrtilloides I,., Minnesota. 
Sali.c nigra Marsh., Alabama, Delaware, Indiana, Iowa, Iouisiana, Nebraska, New York, 
Ohio, South Carolina, Virginia, West Virginia. : 
Salix padophylla Rydb., Colorado. 
Salix perrostrata Rydb., Colorado, Nebraska. 
Salix petiolaris J. E. Smith, New York. 
Salix petrophila Rydb., Alberta. 
Salix pulchra Cham., Alaska. 
Salix reticulata L., Alaska. 
Salix stolonifera Cov., Alaska. 
Salix Watsoni (Bebb) Rydb., Colorado, Wyoming. 
TYPE LOCALITY: California, on Salix Bigelowit. 
DISTRIBUTION : Nearly throughout continental North America. 
ExsIccati: Ellis & Kv. Fungi Columb. 355, 1544, 1545, 1937, 1938, 2041; Kellerm. Ohio Fungi 
46, 47, 166; Griff. West Am. Fungi 347; Clements, Crypt. Form. Colo. 448; Sydow, Ured. 1099; 
Ellis, N. Am. Fungi 1484. : 
6. Uredo albertensis Arthur. 
Melampsora albertensts Arth. Bull. Torrey Club 33: 517. 1906. 
O and I. Pyenia and aecia unknown. 
II. Uredinia hypophyllous, numerous, scattered, round, 0.2-0.4 mm. across, early 
naked, pulverulent, pale-yellow, ruptured epidermis noticeable; paraphyses numerous, 
intermixed with the spores, clavate, 9-15 by 67-904, wall colorless, 3-5 thick, smooth, 
stipe solid; urediniospores flattened laterally, when seen from the broad side broadly- 
elliptical, 16-19 by 23-27 4, when seen from the narrow side oblong, 13-15 by 23-27; wall 
colorless, 1.5-24, much thickened on the flattened sides, 2.5-3.54, evenly and sparsely 
verrucose-echinulate, without smooth spots. 
III. Telia hypophyllous, numerous, small, irregular, often confluent, usually crowded 
in more or less extensive groups about the uredinia, subepidermal, waxy, orange-brown; 
teliospores prismatic, 10-13 by 29-39 «; wall golden-brown, smooth, thin, about 1», thicker 
above, 2-3, with an evident apical pore. 
On SALICACEAE: 
Populus tremulotdes Michx., Alberta. . 
TYPE LOCALITY: Moraine Lake, Laggan, Alberta, on Populus tremuloides, 
DISTRIBUTION: Canadian Rocky Mountains. 
7. Uredo Lini Schum. Enum. Pl. Saell. 2: 230. 1803. 
Uvedo miniata 8 Lint Pers. Syn. Fung. 216. 1801. . 
Hypodermium (Uredo) Lint Link, Ges. Nat. Freunde Berlin Mag. 7: 28. 1815. 
Xyloma Lini Ehrenb. Sylvae Myc. Berol. 27. 1818. 
Podosporium Lini Lév. Ann. Sci. Nat. III. 8: 374. 1847. 
Podocystis Lini Fries, Summa Veg. Scand. 512. 1849. 
Melampsora Lini Desmaz. Pl. Crypt. (Fasc. 41) 2049. 1850. 
QO. Pycnia amphigenous, numerous, scattered, inconspicuous, subepidermal, pale-yel- 
low, flattened globoid or lens-shaped, 100-175 in diameter, 65-954 high; pycniospores 
ellipsoid, 2-3 by 3-4z. 
I. Aecia chiefly hypophyllous, numerous, scattered, rounded, 0.2-0.4 mm. across, bright 
orange-yellow, conspicuous, formed between epidermis and mesophyl, soon naked, rup- 
tured epidermis evident ; aeciospores globoid, 19-27 by. 21-28 ;. wall colorless, thin, about 
14, finely and evenly verrucose, with distinct papillae, pores not evident. 
