Part 2, 1907] UREDINACEAE 107 
4. Pucciniastrum arcticum (Lagerh.) Tranz. Scripta Bot. Hort. Univ. 
Petrop. 4: 300. 1895. 
Uredo arcticus Lagerh. Hedwigia 28: 109. 1889. 
O and I. Pycnia and aecia unknown. 
II. Uredinia hypophyllous, thickly scattered over definite or extended areas, round, 
small, 0.1-0.2 mm. across, orange-yellow fading to pale-yellow, dehiscent by a central pore, 
slightly pulverulent, ruptured epidermis inconspicuous; peridium firm, cells somewhat 
elongate vertically, walls thin above, 2-3“, much thickened below especially toward the 
orifice, smooth, ostiolar cells larger, 35-45 « high, greatly thickened below, coarsely echin- 
ulate above; urediniospores obovate or obovate-oblong, 13-16 by 21-26; wall colorless, 
rather thin, 1-24, noticeably echinulate, with low points. 
III. Telia hypophylious, brownish, flat, small; teliospores intercellular, globoid or 
cuboid, 19-25 # in diameter ; wall brownish, smooth. 
On ROSACEAE : 
Rubus stellatus Smith, Alaska. 
TYPE LOCALITY: Lulea, Sweden, on Rubus arcticus. 
DISTRIBUTION: Alaska ; also in northern Sweden and Russia. 
5. Pucciniastrum pustulatum (Pers.) Dietel, in E. & P. Nat. Pfl. 
1**: 47, 1897, 
Uredo pustulata Pers. Syn. Fung. 219. 1801. 
Uredo pustulata « Epilobit Pers. Syn. Fung. 219. 1801. 
Uredo Epilobii DC. FI). Fr. 6: 73. 1815. 
Caeoma Epilobii Link, in Willd. Sp. Pl. 62: 29. 1825. 
Pucciniastrum Eptlobit Otth, Mitth. Nat. Ges. Bern 1861: 72. 1861. 
Melampsora Epilobit Fuckel, Symb. Myc. 44. 1869. 
Phragmopsora Epilobti Magn. Hedwigia 14: 123, 1875. 
Melampsora pustulata Schrot. Krypt. Fl. Schles. 31: 364. 1887. 
Pucciniastrum Abieti-Chamaenerii Kleb. Jahrb. Wiss. Bot. 34: 387. 1900. 
O. Pycnia hypophyllous, subcuticular, abundant, inconspicuous, flattened, slightly 
conoidal, 50-110 broad, 20-30% high, extending slightly into the lateral walls of the 
epidermis. 
I. Aecia hypophyllous, mostly in two rows, cylindrical, 0.3 mm. diameter, 1 mm. high, 
dehiscent at apex, or also by side slits; peridium colorless, cells slightly overlapping, 
walls thin, outer smooth, inner finely verrucose; aeciospores obovate or irregularly 
globoid, 10-14 by 13-21; wall colorless, an elongate spot smooth on one side, remainder 
finely verrucose, thin, from 1 thick on smooth side to 1.5 on opposite side. 
ON PINACEAE : : : : 
Abies pectinata DC., Europe ; not yet recognized in America. 
II. Uredinia hypophyllous, scattered or in small groups, small, 0.1~0.2 mm. across, 
bullate, round, dehiscent by central pore, yellowish-red fading to pale-yellow, somewhat 
pulverulent, long covered by overarching epidermis; peridium hemispherical, delicate, 
cells cuboidal, walls uniformly thin, 2“, smooth, ostiolar cells scarcely larger, 10-12, 
slightly pointed, wall thin, 2-34, smooth; urediniospores obovate or oval, 10-14 by 13-23. ; 
wall colorless, thin, 1“, sparsely and finely echinulate; contents orange-yellow when fresh. 
III. Telia hypophylious, indehiscent, flat, small, 0.3 mm. across, scattered, sometimes 
gregarious and confluent, reddish-brown becoming blackish-brown ; teliospores nearly in 
one layer, occasionally one above another, oblong or angular by pressure, 10-14 by 17-35, 
walls chestnut-brown, smooth, thin, 1#, thicker at apex, 2-34. 
On ONAGRACEAE : a coe ; 
Chamaenerion angustifolium (L.) Scop. (Epilobium angustifolium \,., E. spicatum Lam.), 
Colorado, Idaho, Michigan, Montana, New Hampshire, New Jersey, New York, South 
Dakota, Vermont, Washington, Wisconsin; New Brunswick; Newfoundland. 
Epilobium adenocaulon Haussk., California, Colorado, Maine, Montana, Nebraska. 
Epilobium adenocaulon occideniale Trel., California. 
Epilobium alpinum I,., Colorado. 
Epilobium anagallidifolium Lam., Montana. : 
Epilobium coloratum Muhl., California, Delaware, Iowa, Nebraska, New York; Ontario. 
Epilobium hirsutum L,., New York; Ontario. 
Epilobium holosericeum Trel., California, ; ; ; 
Epilobium lineare Muhl. (£. palustre lineare A. Gray), Minnesota, Wisconsin. 
