432 NORTH AMERICAN FLORA [VolumE 7 
254. Dicaeoma Verbesinae (Schw.) Kuntze, Rev. 
Gen. 38: 471. 1898. 
Aecidium Verbesinae Schw. Schr. Nat. Ges. Leipzig 1: 68. 1822. 
Puccinia Verbesinae Schw. Schr. Nat. Ges. Leipzig 1:73. 1822. 
Puccinia Actinomeridis Magnus, Ber. Deuts. Bot. Ges. 19: 294. 1901. 
O. Pycnia epiphyllous, numerous, in small groups, noticeable, becoming brownish, glo- 
boid, 90-120 » broad. 
I. Aecia hypophyllous, on reddish spots, solitary or somewhat gregarious; peridium cylin- 
dric, the margin erect, erose or coarsely lacerate; peridial cells rhomboidal or irregularly ellip- 
soid, 23-27 by 29-34, the wall 3-5 u, coarsely verrucose; aeciospores globoid or oblong- 
globoid, 15-20 by 19-28 yu; wall pale-yellowish, thin, 1-1.5 u, closely and strongly verrucose. 
II. Uredinia hypophyllous or becoming somewhat amphigenous, scattered, small, 0.2- 
0.5 mm. across, roundish, early naked, pulverulent, dark cinnamon-brown, ruptured epidermis 
inconspicuous; urediniospores globoid, ellipsoid, or obovoid, 19-23 by 20-26 u; wall cinnamon- 
brown, 1.5—2 » thick, moderately echinulate, the pores 2, equatorial. 
III. Telia hypophyllous, becoming somewhat amphigenous, scattered, small, 0.2-0.6 
mm. across, round, early naked, slightly pulverulent, blackish-brown, ruptured epidermis in- 
conspicuous; teliospores broadly ellipsoid or obovate-ellipsoid, 23-29 by 30-42 wu, rounded at 
both ends, slightly or not constricted at septum; wall dark chestnut-brown, moderately thick, 
2-4 uw, somewhat thicker at apex, 5-7 u, with a slightly lighter umbo, smooth; pedicel slightly 
tinted, fragile, length of spore. 
On CARDUACEAE: 
Verbesina occidentalis (L.) Walt., Alabama, Georgia, Maryland, North Carolina, South 
Carolina, Tennessee, Virginia, West Virginia. 
Type LOCALITY: North Carolina, on Verbesina [occidentalis ?]. 
DISTRIBUTION: West Virginia and Maryland to Alabama. 
ExsiccaTi: Barth. Fungi Columb. 2969; Barth. N. Am. Ured. 2078; Ellis & Ev. Fungi Columb. 
1669; Seym. & Earle, Econ. Fungi 518. 
255. Dicaeoma irregulare (Dietel) Arthur & Jackson. 
?Uredo affinis Speg. Anal. Soc. Ci. Argent. 10:10. 1880. Not Puccinia afinis Sydow, 1902. 
Puccinia irregularis Dietel, Hedwigia 36:33. F 1897. (Not P. irregularis Ellis & Tracy, Je 1897.) 
Oand I. Pycnia and aecia not seen. 
II. Uredinia not seen; urediniospores intermixed with the teliospores, obovoid or ellip- 
soid, 23-26 by 24-324; wall cinnamon-brown, 1.5-2.5 4 thick, moderately and minutely 
echinulate, the pores 2, equatorial. 
III. Telia hypophyllous, scattered or somewhat gregarious, roundish, 0.2-0.6 mm. across, 
long covered by the epidermis, pulvinate, appearing cinereous when covered, blackish-brown 
when exposed; teliospores irregular, clavate, or ellipsoid, 23-29 by 32-50 wu, rounded, obtuse 
or truncate above, rounded or narrowed below, usually noticeably constricted; wall chestnut- 
brown, often lighter below, variable in thickness, 1.5-4 y, slightly thickened above, 5-7 u, 
smooth; pedicel up to once and a half times length of spore, usually collapsed or broken away, 
tinted cinnamon-brown. 
On CaRDUACEAE: 
Verbesina pallens Benth., Nicaragua. 
TYPE LOCALITY: Serra Geral [Estado de Santa Catharina], Brazil, on Verbesina subcordaia. 
DISTRIBUTION: Nicaragua; also in South America. 
256. Dicaeoma cognatum (Sydow) Arthur & Jackson. 
Puccinia similis Long, Bull. Torrey Club 29: 113. F 1902. Not P. similis Ellis & Ev. 1898. 
Puccinia cognata Sydow, Monog. Ured.1:172. Je 1902. 
O. Pycnia epiphyllous, few, in small groups, inconspicuous, orange-yellow fading to 
brownish, globoid or flattened-globoid, 80-100 u in height by 125-160 » in breadth. 
I. Aecia hypophyllous on discolored spots, solitary or somewhat gregarious; peridium 
short, cylindric, the margin erose or coarsely lacerate; peridial cells irregularly rhomboid or 
ellipsoid, 18-26 by ,32-44 4, not noticeably overlapping, the wall colorless, 1.5-4 « thick, 
strongly verrucose; aeciospores globoid or ellipsoid, 16-22 by 22-26 u; wall colorless or pale- 
yellowish, 1-2 » thick, closely and strongly verrucose. 
