Part 5, 1920] AECIDIACEAE 377 
153. Dicaeoma Smilacis (Schw.) Kuntze, Rev. Gen. 33: 470. 1898. 
Aecidium Smilacis Schw. Schr. Nat. Ges. Leipzig 1: 69. 1822. 
Uredo Smilacis Schw. Schr. Nat. Ges. Leipzig 1:70. 1822. 
Puccinia Smilacis Schw. Schr. Nat. Ges. Leipzig 1:72. 1822. 
Caeoma Smilacis Link, in Willd. Sp. Pl. 62:9. 1825. 
Caeome smilacinaium Link, in Willd. Sp. Pl. 62:43. 1825. 
Aecidium (Caeoma) smilacinatum Schw. | ‘Trans. Am. Phil. Soc. II. 4: 309, 1832. 
O. Pycnia epiphyllous, few, gregarious on dark-brown spots opposite the aecia, incon- 
spicuous, becoming dark-brown, punctiform, about 0.1 mm. in diameter. 
I. Aecia hypophyllous, gregarious on considerably raised, circular, dark-brown spots 
2-10 mm. in diameter, immersed, cupulate, 0.2-0.3 mm. in diameter; peridium whitish, the 
margin erect, lacerate; peridial cells rhomboidal, 16-23 by 26-40», much overlapping, the 
outer wall thick, 7-15 », smooth, transversely striate, the inner wall thin, 2-5 u, verrucose; 
aeciospores globoid or broadly ellipsoid, 19-25 by 23-29 yu; wall colorless, thin, 1-2 », verrucose. 
II. Uredinia hypophyllous, numerous, scattered or. sometimes confluent, roundish, oval 
or irregular, 0.2-1 by 0.2-1.5 mm., early naked, pulverulent, cinnamon-brown, ruptured epi- 
dermis conspicuous; urediniospores ellipsoid, 17-24 by 23-32 4; wall yellowish or golden, 
moderately thick, 1.5—2.5 4, moderately echinulate, the pores 3, occasionally 2 or 4, equatorial. 
III. Telia hypophyllous, numerous, scattered or confluent in rings, often concentrically 
arranged, roundish, oval or irregtilar, 0.2-0.5 by 0.2-1.5 mm., early naked, compact, pulvinate, 
blackish, ruptured epidermis conspicuous; teliospores ellipsoid, 17-23 by 30-51 4, rounded or 
acute above, usually narrowed below, constricted at septum; wall cinnamon-brown, moder- 
ately thin, 1-2.5 4, thicker at apex, 5-10 », smooth, often with a subhyaline umbo over the 
apical pore; pedicel hyaline, usually fragile. 
On SMILACACEAE: 
Nemexia herbacea (1,.) Small (Smilax herbacea L.), District of Columbia, Kentucky. 
Nemexia tamnifolia (Michx.) Small (Smilax tamnifolia Michx.), Texas. 
Ba Bona-nox I,., Arkansas, Florida, Louisiana, Oklahoma, South Carolina, Tennessee, 
‘exas. 
Smilax domingensis Willd., Porto Rico. 
Smilax glauca Walt., Alabama, Arkansas, Delaware, District of Columbia, Florida, Geor- 
gia, Indiana, Kentucky, Mississippi, New Jersey, New York, North Carolina, Ohio, 
South Carolina, Tennessee, Texas, Virginia. 
Smilax havanensis Jacq., Cuba. 
Smilax hispida Muhl., District of Columbia, Nebraska. 
Smilax laurifolia L., New Jersey. 
Smilax Pseudo-china L., South Carolina, Texas. 
Smilax rotundifolia L., ’Arkansas, Delaware, District of Columbia, Louisiana, Maryland, 
North Carolina, Oklahoma, Tennessee. Virginia. 
Smilax sp., Oaxaca; "Jamaica. 
TYPE LOCALITY: [Salem’} North Carolina, on Smilax rotundifolia. 
DIstRIBuTION: Southern New York, Ohio, and Nebraska southward through the West Indies 
and Mexico. 
ILLustRATIONS: Holway, N. Am. Ured. 1: pl. 10, f. 4 
Exsiccatt: Barth. Fungi Columb. 2468, 2864, 2865, 4574, 5072; Barth. N. Am. Ured. 968, 
1076, 1173, 1370, 1571, 1667, 1866, 1867, 2057, 2058, 2163, 2264; Ellis & Ev. Fungi Columb. 1660, 
1661: Ellis, N. Am. Pungi 1062, 1477; Kellerm. Ohio Fungi 14; Seym. & Earle, Econ. ee 218, 
390, 391; Sydow, Ured, 2331; Thim. ‘Myc. Univ. 30, 1643. 
154, Dicaeoma (?) Aletridis (Berk. & Curt.) Kuntze, Rev. Gen. 3°: 
467. 1898. 
Puccinia Aletridis Berk. & Curt. Grevillea 3:52. 1874. 
O and I. Pycnia and aecia unknown. 
II. Uredinia amphigenous, scattered, roundish or elliptic, small, 0.1-0.3 mm. across, 
rather tardily naked, pulverulent, cinnamon-brown, ruptured epidermis noticeable; uredinio- 
spores globoid or ellipsoid, 15-22 by 20-28 »; wall cinnamon-brown, rather thin, 1.5 », moder- 
ately or sparsely and strongly echinulate, the pores 2, superequatorial. 
III. Telia amphigenous, scattered, roundish or elliptic, small, 0.2-0.4 mm. across, rather 
tardily naked, dark cinnamon-brown, ruptured epidermis conspicuous; teliospores oblong or 
clavate-oblong, 14-20 by 30-50 u, obtuse or acute above, obtuse or narrowed below, slightly 
constricted at septum; wall smooth, light golden-brown, rather thin, 1-1.5 4, much thicker, 
3-10 y, and paler at apex; pedicel nearly colorless, slender, one half to once length of spore. 
