ORTON: north AMERICAN SPECIES OF ALLODUS 



179 



Analytical key 

 Teliospores spinulose. 



Teliospores beset with long slender spines. 

 Teliospores coarsely tuberculate. 

 Teliospores less than 40 n long. 



Apex not more than 5 /z thick. 

 Apex up to 7 Ai thick. 

 Teliospores more than 40 /x long. 

 Apex not more than 5 m thick. 

 Apex 6-12 /x thick. 



Aeciospore wall 3 m or more thick. 

 Aeciospore wall less than 3 n thick. 



Aeciospore wall coarsely verrucose. 

 Aeciospore wall finely verrucose. 

 Aeciospores 16-22 by 19-26^1. 

 Aeciospores 19-28 by 24-34 M- 

 Apex 12-19 fj. thick. 

 Teliospores finely verrucose. 

 Apex less than 3 n thick. 



Teliospores not over 30 ix long. 

 Teliosp.ores 30-40 n long. 



Ruptured epidermis conspicuous. 



Telia rupturing epidermis to form a con- 

 spicuous ostiole. 

 Telia not rupturing epidermis as above. 

 Ruptured epidermis not conspicuous. 

 Apex 3-5 11 thick. 



Teliospore wall 1.5-2 n thick. . 



Teliospores not constricted at septum. 

 Teliospores constricted at septum. 



Teliospores conspicuously verrucose, especi- 

 ally at apex. 

 Teliospores very inconspicuously verrucose. 

 Teliospore wall 2.5-3.5 M thick. 

 Apex 5-8 n thick. 



Teliospore wall 1.5-2 n thick. 

 Teliospore wall 2-3 /x thick. 



Pedicel normally placed, very short. 

 Pedicel placed at septum. 

 Pedicel normally placed, long. 

 Teliospore wall 3-4 /x thick. 

 Teliospores striately verrucose. 

 Apex not thickened. 



Teliospore wall 1-I.5 /x thick. 

 Teliospore wall 2 n thick. 

 Teliospore wall 2-2.5 M thick. 

 Apex thickened up to 5 ju. 



Teliospore wall 3-3.5 /x thick. 

 Apex 12-23 IX thick. 

 Teliospores smooth. 



12. A. Podophylli. 



21. A. asperior. 

 38. A. rufescens. 



5. A. Carnegiana. 



26. A. opulenta. 



30. A. superfliia. 



27. A. crassipes. 



31. A. megalospora. 

 29. A. nocticolor. 



36. A. Chamaesarachae. 



42. A. intermixta. 

 18. A. Erigeniae. 

 23. A. lacerata. 



2. A. pagana. 



3. A. Calochorti. 



37. A. Palmeri. 



14. A. effusa. 



8. A. claytoniata. 



33. A. Giliae. 



35. A. vertisepta. 



22. A. Musenii. 



39. A. Bouvardiae. 



6. A', suhangulata. 



4. A. Moreniana. 



17. A. Jonesii. 



20. A. Lindrothil. 



28. A. insignis. 



