468 NORTH AMERICAN FLORA [VoLuUME 7 
0.2-0.5 mm. in diameter; peridium whitish, becoming lacerate and revolute, easily falling away; 
peridial cells cylindric or rhomboidal, 10-19 by 33-47 u, the outer wall 1.5—2 pu thick, striate, the 
inner wall 5-7 » thick, prominently verrucose, often much thicker at apex; aeciospores globoid, 
16-19 by 21-26 yw; wall colorless, 2~2.5 » thick, coarsely verrucose. 
ItI. Telia chiefly epiphyllous, scattered or gregarious, arising opposite or from the aecia, 
circular in outline, 0.1-0.4 mm. in diameter, early naked, soon becoming confluent and forming 
conspicuous sori up to 3 mm. across, pulvinate, conspicuously pulverulent, blackish-brown, 
ruptured epidermis rather conspicuous; teliospores ellipsoid, 25-34 by 46-64», narrowed 
above, rounded below, very. slightly constricted at septum; wall dark chestnut- or chocolate- 
brown, 3.5—5 w thick, coarsely and sparsely verrucose, prolonged into a beak above, 8-124 
thick, concolorous; pedicel tinted next to spore, up to one and one half times length of spore. 
On CONVOLVULACEAE: 
Ipomoea arborescens (H. & B.) G. Don, Guerrero. 
TYPE LOCALITY: Iguala, Mexico, on “Ipomoea murucoides,” error for I. avborescens. 
DISTRIBUTION: Known only from the type locality. 
29. Allodus rubicunda (Holway) Arthur & Orton. 
Puccinia rubicunde Holway, Ann. Myc. 2: 392. 1904, 
O. Pycnia not seen. 
I. Aecia chiefly epiphyllous, occurring singly or in loose groups of varying size, pulvinate, 
0.2-0.6 mm. in diameter, opening by an apicular ostiole; peridium whitish, scarcely protruding 
above the overarching epidermis, erose; peridial cells rhomboidal, 16-20 by 32-40 y, the outer 
wall 2-2.5 » thick, smooth, the inner wall 2.5—4 « thick, conspicuously verrucose; aeciospores 
globoid or ovoid, 19-23 by 23-29 uw; wall colorless, 2.5—3 « thick, coarsely verrucose. 
III. Telia epiphyllous, scattered, or in circinating groups around the aecia, or from the 
old aecial cups, orbicular, about the same size as the aecia, rather early naked, epidermis opening 
by an apical ostiole, pulvinate, slightly pulverulent, blackish-brown, overarching epidermis 
conspicuous; teliospores broadly ellipsoid, 27-32 by 40-47 u, usually rounded at both ends, 
rarely narrowed above, not constricted at septum; wall dark vinous-brown, 3-4 » thick, rather 
coarsely tuberculate, usually uniform, rarely thickened to 6 u above and slightly paler, pores 
2 in each cell near the septum; pedicel colorless, delicate, up to length of spore. 
ON CONVOLVULACEAE: 
Ipomoea fistulosa Mart., Veracruz. 
TYPE LOCALITY: Near Veracruz, Mexico, on Ipomoea sp., now determined as I. fistulosa. 
DISTRIBUTION: Known only from the type locality. 
30. Allodus Giliae (Peck) Orton, Mem. N Y. 
Bot. Gard. 6:199. 1916, 
Aecidium Giliae Peck, Bot. Gaz. 4: 230. 1879. 
Puccinia plumbaria Peck, Bot. Gaz, 6: 228. 1881. 
Puccinia Wilcoxiana Thitm. Myc. Univ. 2032. 1881. 
Puccinia plumbaria phlogina Ellis, N. Am. Fungi 1044, hyponym. 1883. 
Aecidium Wilcoxianum Thiim. Myc. Univ. 2226, hyponym. 1884. 
Aecidium Cerastii Wint.; Wint. & Demetrio, Hedwigia 24:179. 1885; Jour. Myc.1:126. 1885. 
Aecidium Phlogis Peck; Arth. Bull. Iowa Agr. Coll. 1884: 167, hyponym. 1885. 
Puccinia patagonica Speg. Bol. Acad. Nac. Ci. Cordoba 11:29, 1887. 
Puccinia fragilis Tracy & Gall. Jour. Myc. 4: 20. 1888. 
Aecidium Phlogis Ellis & Ev. Bull. Torrey Club 24: 284. 1897. 
Puccinia Purpusii P. Henn. Hedwigia 37: 270. 1898. 
Puccinia giliicola P. Henn. Hedwigia 37: 270. 1898; Rab.-Paz. Fungi Eur. 4227. 1901. 
Dicaeoma fragile Kuntze, Rev. Gen. 33: 468. 1898. 
Dicaeoma plumborium Kuntze, Rev. Gen. 33: 470. 1898. 
Aecidium patagonicum Speg. Anal. Mus. Nac. Buenos Aires III. 1: 66. 1902. 
Allodus plumbaria Arth. Résult. Sci. Congr. Bot. Vienne 345, 1906. 
O. Pycnia amphigenous, scattered among the aecia, globoid, 100-1304 in diameter, 
honey-yellow. 
I. Aecia hypophyllous, numerous, distributed rather evenly and thickly over large areas, 
often over the entire under surface of leaf, cupulate, short, 0.3-0.7 mm. in diameter; peridium 
yellowish, the margin spreading or somewhat recurved, irregularly lacerate; peridial cells 
rhombic, 16-25 by 26—32 u, the outer wall 5-10 » thick, striate, the inner wall 3-6 » thick, 
rather coarsely verrucose; aeciospores globoid, 13-19 by 14-22 u; wall about 1 » thick, color- 
less, very minutely verrucose, appearing smooth in water. 
