386 NORTH AMERICAN FLORA [VoLuME 7 
DistRIBurTIon: Along the Atlantic coast from Massachusetts to Florida, and locally in Indiana 
and Oregon, forming urediniospores only; also in Europe and Asia. 
ILLustRations: Beitr. Krypt. Schweiz 22: f. 101; Hol Am. Ured. 1: pl. 12, f. 51 a, b; 
Krypt.-fl. Brand. Pilze 3: f. BS. , ania ca a ae oy a 
170. Dicaeoma punctiforme (Dietel & Holway) Arthur. 
Puccinia punctiformis Dietel & Holway ; Dietel, Erythea 2: 128. 1894, 
O and I. Pycnia and aecia unknown. 
II. Uredinia amphigenous, numerous, scattered, not confluent, round, punctiform, up 
to 0.5 mm. in diameter, rather tardily naked, pulverulent, light-brown, ruptured epidermis 
conspicuous; urediniospores broadly ellipsoid or obovoid, 18-26 by 26-37 u; wall light yellow- 
ish-brown, 1-1.5 » thick, finely and rather sparsely echinulate, the pores 4, equatorial or 
slightly above the equator. 
Ill. Telia amphigenous, numerous, scattered, occasionally confluent in small groups, 
punctiform, 0.5—-1 mm. in diameter, rather tardily naked, compact, -pulvinate, brownish- 
black, ruptured epidermis conspicuous; teliospores oblong or clavate, 16-23 by 34-5ly, 
rounded or truncate above, narrowed below, moderately constricted at septum; wall cinnamon- 
brown, darker at apex, 1-2 » thick, thickened to 5—9 » at apex, smooth; pedicel slightly colored, 
rather broad, up to 7 », about one half length of spore, thin-walled. 
ON POLYGONACEAE: 
Rumex crispus L., Guatemala. 
Rumex hymenosepalus Torr., California. 
Rumex mexicanus Meissn., Hidalgo, Mexico (state). 
Rumex occidentalis S. Wats., California. 
Rumex salicifolius Weinm., California. 
Tyrer LocaLity: Berkeley, Alameda County, California, on Rumex salicifolius. 
DISTRIBUTION: From central California southward through Mexico and Central America. 
ILLustrations: Holway, N. Am. Ured. 1: pl. 11, f. 50 a, b. 
ExsiccaTi: Barth. N. Am. Ured. 259. 
171. Dicaeoma Oxyriae (Fuckel) Kuntze, Rev. 
Gen. 3°: 469. 1898. 
Puccinia Oxyriae Fuckel, Jarb. Nass. Ver. Nat. 29-30: 14. 1875." 
Puccinia Oxyriae F. B. White; Cooke, Grevillea 11:15. 1882. 
Puccinia Buchanant De-Toni, in Sacc. Syll. 7: 723. 1888. 
O and I. Pycnia and aecia unknown. 
II. Uredinia amphigenous, numerous, scattered, confluent, at times in groups of three or 
four, irregular in shape, large, up to 1 mm. across, rather early naked, pulverulent, golden- or 
cinnamon-brown, ruptured epidermis evident; urediniospores ellipsoid or obovoid, 21-28 by 
27-35 4; wall golden-brown, thick, 2—-2.5 », finely and sparsely echinulate, the pores rather 
indistinct, 4-6, scattered. 
III. Telia fairly numerous, scattered, roundish or irregular, large, up to 1.5 mm. across, 
rather tardily naked, pulvinate, compact, chestnut-brown, ruptured epidermis conspictious; 
teliospores ellipsoid or oblong, 18-23 by 32-54 yw, rounded above and below, sometimes nar- 
rowed slightly below, moderately constricted at septum; wall light chestnut-brown, 2-3 p 
thick, thickened over germ-pores into a broad cap-like tinted umbo, 7-9 u, the lower cell al- 
most smooth, the upper cell prominently ridged by irregular verrucose markings; pedice 
hyaline or very pale-yellow, as long as spore or shorter. 
On POLYGONACEAE: : aa 
Oxyria digyna (I,.) Hill, California, Colorado, Idaho, Oregon, Utah; Alberta, British 
Columbia. 
Type Locality: Mountains near St. Maurice, Switzerland, on Oxyria digyna. : 
DIsTRIBUTION: Alpine stations from central Colorado and Utah to British Columbia and 
Alberta. 
"Tr usTRATIONS! Beitr. Krypt. Schweiz 22: f. 102; Holway, N. Am. Ured. 1: 91. 12, f. 52a, b. 
172. Dicaeoma Guillemineae (Dietel & Holway) Arthur. 
Puccinia Guillemineae Dietel & Holway; Holway, Bot. Gaz. 24:34. 1897. 
O. Pycnia not seen. 
I. Aecia usually epiphyllous, solitary or usually in small groups on raised areas 0.4-1 mm. 
in diameter, cupulate or short-cylindric, small, 0.1-0.2 mm. in diameter; peridium whitish, 
