362 NORTH AMERICAN FLORA [VOLUME 7 
I. Aecia hypophyllous, gregarious, in large open groups on discolored areas 4-10 mm. 
across, very short, 0.2-0.3 mm. in diameter, pale-yellow; peridium colorless, the margin re- 
curved, erose; peridial cells rhomboidal in longitudinal section, overlapping, the outer wall 
rather thick, 3-4 y, striate, smooth, the inner wall thin, about 1 u, finely verrucose; aeciospores 
12-16 by 14-19 yw; wall pale-yellow, thin, 1 y or less, finely verrucose. 
ON PHRYMACEAE: 
Phryma Leptostachya L., lowa, Minnesota, Nebraska, New York, South Dakota, Wisconsin. 
II. Uredinia hypophyllous, scattered, roundish or oblong, 0.2-0.4 mm. long, early naked, 
ruptured epidermis noticeable; urediniospores obovoid or broadly ellipsoid, 13-18 by 18-23 y; 
wall light cinnamon-brown, 1~1.5 4 thick, finely and rather inconspicuously echinulate, the 
pores 2, in the upper part. 
III. Telia hypophyllous, scattered, roundish or oblong, 0.2—0.4 mm. wide by 0.3-0.8 mm. 
long, early naked, dark chocolate-brown, pulvinate, ruptured epidermis noticeable; telio- 
spores clavate-oblong, 12—-18 by 29-45 yw, rounded or obtuse at apex, usually narrowed below, 
slightly constricted at septum; wall chestnut-brown, concolorous, 1—1.5 » thick, much thicker 
above, 7-13 u; pedicel about length of spore or less, nearly colorless. 
On CYPERACEAE: 
Carex Sprengeliit Dewey (C. longirostris Torr.), Iowa, Nebraska, Wisconsin; Ontario. 
TYPE LOCALITY: Spirit Lake, Iowa, on Phryma Leptostachya. 
= Pada Locally from central Nebraska and South Dakota eastward to western New 
ork. 
Exsiccati: Barth. Fungi Columb. 3958; Barth. N. Am. Ured. 253, 956, 1067. 
135. Dicaeoma Asterum (Schw.) Arthur & Kern. 
Aecidium Asterum Schw. Schr. Nat. Ges. Leipzig 1:67. 1822. 
Aecidium Solidaginis Schw. Schr. Nat. Ges. Leipzig 1:68. 1822. 
Caeoma asteratum Link, in Willd. Sp. Pl. 6:51. 1825. 
Caeoma (Aecidium) erigeronatum Schw. Trans. Am. Phil. Soc. II. 4: 292. 1832. 
Aecidium (Caeoma) asteratum Schw. Trans, Am. Phil, Soc. II. 4: 309. 1832. 
Aecidium (Caeoma) erigeronatum Schw. Trans. Am. Phil. Soc. II. 4: 309. 1832. 
Aecidium Bellidiastyi Unger, Exanth. Pfl. 109. 1833. 
Aecidium Asteris Thiim. Myc. Univ. 935. 1878. 
Aecidium Linosyridis Lagerh. Mitth. Bad. Bot. Ver. 46. 1888. 
Puccinia extensicola Plowr. Brit. Ured. 181. 1889. 
Puccinia firma Dietel, Hedwigia 31: 216. 1892. 
Puccinia vulpinoidis Dietel & Holway: Dietel, Bot. Gaz. 19: 304. 1894, 
Puccinia tecta Ellis & Barth. Erythea 4:79. 1896. 
Puccinia fusiformis Dietel, Hedwigia 36:29. 1897. 
Aecidium microsporum Dietel, Hedwigia 36: 34. 1897. 
Dicaeoma extensicola Kuntze, Rev. Gen. 33: 468. 1898. 
Dicaeoma firmum Kuntze, Rev. Gen. 3°: 463. 1898. 
Aecidium Grindeliae Sydow, Hedwigia Beibl. 40:1. 1901. 
Aecidium Boltoniae Arth. Bull. Torrey Club 28: 664. 1901. 
Puccinia Caricis-Erigerontis Arth. Jour. Myc. 8:53. 1902. 
Puccinia Caricis-Asteris Arth. Jour. Myc. 8:54. 1902. 
Puccinia Caricis-Solidaginis Arth. Bot. Gaz. 35:21. 1903. 
Puccinia Dulichii Sydow, Monog. Ured. 1: 684. 1903. 
Dicaeome Coricis-Asteris Arth. Proc. Ind. Acad. Sci. 1903: 147, 1904. 
Dicaeoma Caricis-Erigerontis Arth. Proc. Ind. Acad. Sci. 1903: 147. 1904. 
Dicaeome Caricis-Solidaginis Arth. Proc. Ind. Acad. Sci. 1903: 147. 1904. 
Dicaeoma Dulichii Arth. Proc. Ind. Acad. Sci. 1903: 147. 1904. 
Dicaeoma erigeronatum Arth. Résult. Sci. Congr. Bot. Vienne 344, 1906. 
Puccinia asterum Kern, Mycologia 9: 224. 1917. 
O. Pycnia amphigenous, chiefly epiphyllous, in orbicular groups 0.5~1.5 mm. across, 
crowded, punctiform, honey-yellow, rather inconspicuous, globoid, 80-150 in diameter; 
ostiolar filaments 45-65 » long. 
I. Aecia hypophyllous, in annular or crowded orbicular groups, 2-8 mm. or more across, 
on slightly hypertrophied and sometimes discolored spots; peridium whitish, cupulate, 0.1- 
0.3 mm. across, the margin much divided and recurved; peridial cells rhomboidal, 19-32 » long, 
somewhat overlapping, the outer wall 5-9 uw thick, transversely striate, smooth, the inner wail 
thinner, 3-4 4, verrucose; aeciospores globoid, 11-15 by 13-18 u; wall nearly colorless, thin, 
about 1 yp, minutely verrucose. 
On CARDUACEAE: 
Aster acuminatus Michx., Nova Scotia. 
Aster adscendens Lindl., Colorado, Montana, Utah. 
