Part 7, 1922] AECIDIACEAE 521 
Teliospores ellipsoid. 
Teliospore-wall minutely verrucose, seemingly smooth. 
Teliospore-wall with umbo at apex. 14. M. Treleasiana. 
Teliospore-wall uniformly thin. 
Teliospores smali, up to 324 long; mesospores 
_ absent. 15. M. Delphinii. 
Teliospores larger, up to 35 u long; mesospores : 
present. 16. M. andina. 
Teliospore-wall coarsely verrucose. 17. M. Renunculi. 
Host belonging to family Berberidaceae. 18, M. Berberidis-trifoliae. 
Host belonging to family Fumariaceae. 19, M. Brandegei. 
Host belonging to family Brassicaceae. 
Telia tardily naked, finally becoming pulverulent. 
Teliospores narrowly oblong. 20, M. Dentariae. 
Teliospores ellipsoid. 
Teliospores with apical umbo. 21, M. Drabae. 
Teliospores with inconspicuous or no umbo. 22. M. utahensis, 
Telia early naked, pulvinate. 
Teliospores oblong, the pedicels persistent. 
Teliospore-wall thin, 1-1.5 yu. 23. M. Thlaspeos. 
Teliospore-wall thicker, 1.5-2 yu. 24. M. Holboellit. 
Teliospores usually ellipsoid, the pedicels deciduous. 
Teliospore-wall thin, 1-2 pu. 29, M. Cruciferarum. 
Teliospore-wall thicker, 2-3.5 yp. 26. M. aberrans. 
Host belonging to family Crassulaceae. 
Teliospore-wall finely verrucose. 27. M. Rydbergit. 
‘Teliospore-wall nearly or quite smooth. 28. M. Rhodiolae. 
Host belonging to family Saxifragaceae. 
Teliospore-wall smooth; teliospores oblong-fusiform. 
Teliospores large, 18-20 X 40-50 yu. 29. M. laurentiana. 
Teliospores smaller, 13-16 X 26-38 yu. 30. M. pallido-maculata. 
Teliospore-wall smooth with occasional striae; teliospores 
mostly oblong. 31. M. Heucherae. 
Teliospore-wall striate; teliospores mostly ellipsoid. ; 
Teliospore-wall finely striate. 32. M. curtipes. 
Teliospore-wall coarsely striate. : 33. M. Lithophragmae. 
Teliospore-wall verrucose; teliospores mostly ellipsoid or 
oblong. 
Teliospore-wall coarsely verrucose. aa 
Teliospore-wall thickened up to 5 u above. 34. M. Heterisiae. 
‘Teliospore-wall thickened up to 7 u above. 35. M. turrita. 
‘Teliospore-wall minutely verrucose, appearing smooth. : ; . 
Teliospores 19-23 uw broad. 36. M. Saxifragae-tricuspidatae. 
Teliospores 15-18 4 broad. 37. M. Jueliana. 
Host belonging to family Parnassiaceae. 38. M. Parnassiae. 
Host belonging to family Grossulariaceae. on 
Teliospores verrucose. 39. M. Ribis. 
Teliospores smooth. 40. M. Parkerae. 
Host belonging to family Rosaceae. , . 
Teliospores ellipsoid; teliospore-wall rugose. 41, M, Sieversiae. 
Teliospores cylindric; teliospore-wall smooth. 42. M. Waldsteiniae. 
Host belonging to family Geraniaceae. 43. M. Leveillei. 
Host belonging to family Polygalaceae. 44, M. Pyrolae. 
Host belonging to family Sapindaceae. 45. M. Arechavaletae. 
Host belonging to family Rhamnaceae. 46. M. Mesnieriana. 
Host belonging to family Tiliaceae. 47. M. Triumfetiae. 
a belonging to ere ae 
eliospores large, 38-75 u. 
Telia usually light-brown, scattered. 48. M. Malvacearum. 
Telia usually dark-brown, gregarious. . 
Teliospores up to 754 long; wall moderately thick, Pe eee er 
1. : . M. Sh : 
Pellospores up to 48 u long; wall very thick, 3-5 pw. 50. M. Sidalceae. 
Seiad tale ee ee Be 
elia usua ark-brown. 
Mesosnores predominating. 51. M. bottle Sa 
a Mesospores rare or wanting. 52. M. lobata. 
elia usually light-brown. 
Teligsnore-wall thick, 2-3 », much thicker above. 53, M. Anodae. 
Teliospore-wall thin, 1-2 4, scarcely thicker above. 54. M. Pie 
Host belonging to family Sterculiaceae. oe a . de pes. 
Host belonging to ered a aoa » M. hiascens. 
Host belonging to family Violaceae. ; 
J eherpare: wall smooth. 57. M. Fergussont. 
eliospore-wall striate. . 
Teliospores ellipsoid or oblong, striae few. oe uv . baeeeeee 
Teliospores narrowly oblong, striae numerous. ay Caples, . 
Host belonging to family Lythraceae. 
Host belonging to family Onagraceae. 
