Part 4, 1920] AECIDIACEAE 309 
II. Uredinia amphigenous, few, intercostal or scattered, oblong or linear, small, 0.3- 
0.7 mm. long, early naked, light cinnamon-brown, pulverulent, ruptured epidermis not ap- 
parent; urediniospores globoid, broadly ellipsoid or obovoid, 18-26 by 19-30 u; wall light cin- 
namon-brown, moderately thick, 1.5-2.5 u, finely and moderately echinulate, the pores 6~8, 
scattered. 
III. Telia amphigenous, numerous, often crowded, rounded, elliptic or linear, 0.3-1 mm. 
long, early naked, dark chocolate-brown, pulvinate, ruptured epidermis inconspicuous; telio- 
spores oblong or broadly ellipsoid, 16-26 by 24-45 yu, rounded at both ends or sometimes ob- 
tuse above, only slightly if at all constricted at septum; mesospores sometimes present, 18-21 
by 23-29 yw; wall dark chestnut-brown, 1.5—2.5 » thick, moderately thickened at apex, 3-9 p; 
pedicel light-golden, once to thrice length of spore. 
On PoacEAE: 
Epicampes rigens Benth., California, New Mexico. 
Melica mutica Walt. (M. diffusa Pursh), Indiana. 
Melica Porteri Scribn., Colorado. 
Monanthochloé littoralis Engelm., Texas. 
Muhlenbergia cuspidata (Torr.) Rydb. (Sporobolus cuspidatus Wood), Iowa, Nebraska, North 
Dakota, South Dakota. 
Muhlenbergia filiformis (Thurber) Rydb., New Mexico. 
Muhlenbergia gracillima Torr., Colorado. 
Muhlenbergia mexicana (L.) Trin., Illinois, Indiana, Iowa, Kansas, Kentucky, Maryland, 
Nebraska, New York, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, West Vir- 
ginia, Wisconsin. 
Muhlenbergia parviglumis Vasey, Texas. 
Muhlenbergia plumbea (Trin.) Hitche., Mexico (state). 
Muhlenbergia Porteri Scribn., Arizona. 
Muhlenbergia racemosa (Michx.) B.S.P. (M. glomeraia Trin.), Indiana, Kansas, Nebraska, 
North Dakota, South Dakota. 
pau cell repens (Presl) Hitche. (Sporobolus repens Presl, S. utilis Torr.), New Mexico, 
‘exas. 
Muhlenbergia Richardsonii (Trin.) Rydb., Montana, North Dakota. 
Muhlenbergia Schreberi Gmel. (M. diffusa Willd.), Arkansas, Delaware, Illinois, Indiana, 
Jowa, Kansas, Nebraska, New Jersey, New York, North Carolina, Ohio, Pennsylvania, 
West Virginia. 
Muhlenbergia sobolifera (Muhl.) Trin., Indiana. 
Muhlenbergia squarrosa (Trin.) Rydb. (M. Richardsonit Rydb., Sporobolus depauperatus 
Scribn. not Muhlenbergia depauperata Scribn.), Arizona, Montana, New Mexico, Utah. 
Muhlenbergia tenuiflora (Willd.) B.S.P., Indiana. : 
Muhlenbergia trifida Hack., Colorado, New Mexico, Utah. 
Muhlenbergia umbrosa Scribn. (M. sylvatica Torr.), Virginia. 
Schedonnardus paniculatus (Nutt.) Trel. (S. texanus Steud.), Colorado, Kansas, Nebraska, 
South Dakota. : 
Sporobolus airoides Torr., North Dakota. 
Sporobolus asperifolius (Nees & Meyen) Thurber, Colorado, Kansas, Montana, Nebraska, 
New Mexico, North Dakota, Texas, Utah. 
Sporobolus auriculatus Vasey, Texas. 
Triplasis purpurea (Walt.) Chapm. (Triodia purpurea Hack., Tricuspis purpurea A. Gray), 
Kansas, Oklahoma, Texas. 
Type rocatiry: Bethlehem, Pennsylvania, on Hibiscus militaris. 
DistRIBuTION: Throughout the United States, with the exception of the northern Pacific slope, 
and extending to southern Mexico. 
ILLUSTRATIONS: Bull. Lab. Nat. Hist. Univ. Iowa 5: ol. 2, 3, f. 50a-e, pl. 7, f. 57a, b. 
Exsiccatt: Arth. & Holway, Ured. Exs. Ic. 50a-e, 57a, b; Barth. N. Am. Ured. 49, 248, 249, 364, 
365, 372, 471, 557, 665, 754, 1078, 1603, 1649, 1768, 1971, 2050, 2157, 2257; Barth. Fungi Columb. 
2362, 2471, 2670, 2860, 3263, 3264, 3573, 3853, 3949, 4373, 4858; Brenckle, Fungi Dak. 46, 110, 116; 
Clements, Crypt. Form. Colo. 597; Ellis & Ev. Fungi Columb. 871, 987, 1297, 1377, 1393, 1467, 1668, 
1768, 1773, 1905, 2065, 2162; Ellis & Ev. N. Am. Fungi 1830, 1854, 2886, 3345, 3474; Garrett, Fungi 
Utah. 59, 60; D. Griff. W. Am. Fungi 96, 296, 301, 302, 303; Kellerm. Ohio Fungi 82, 108, 109; Kellerm. 
& Swingle, Kans. Fungi 16, 26, 44; Rab.-Wint.-Paz. Fungi Eur. 4220; Sydow, Ured. 1068, 1081, 
1173, 1245, 1727, 1900, 2321, 2334, 2384; Vesterg. Micr. Rar. Sel. 1103; Zahlbr. Krypt. 2011a, b. 
50. Dicaeoma dochmium (Berk. & Curt.) Kuntze, Rev. Gen. 3°: 
468. 1898. 
Puccinia dochmia Berk. & Curt. Proc. Am. Acad. 4: 126. 1858. 
Puccinia Windsoriae australis F. W. Anderson, Jour. Myc. 6: 123. 1891. 
O and I. Pyenia and aecia unknown. 
Il. Uredinia amphigenous, few, scattered, rounded or elliptic, small, 0.3-0.5 mm. long, 
early naked, pulverulent, cinnamon-brown, ruptured epidermis inconspicuous; urediniospores 
globoid, 18-23 by 19-27 yu; wall thin, 1-1.5 u, golden- to light cinnamon-brown, fine y echin- 
ulate, the pores 6, sometimes inconspicuous, scattered. 
