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20. Gymnosporangium clavipes C. & P. Teliospores on 

 Juniperus Sibirica Burgsd., sown on Amelcmchier intermedia 

 Spach, and A. erecta Blanch. 



21. Gymnosporangium clavariaeforme (Jacq.) DC. 

 Teliospores on Juniperus Sibirica Burgsd., sown on Amelanchier 

 intermedia Spach. 



22. Gymnosporangium nidus-avis Thax. Teliospores on 

 Juniperus Virginiana L., sown on Malus Malus (L.) Britt. 



B. Species reported now for the first time. 



i. Puccinia vexans Farl. Amphispores on Atheropogon 

 curtipendulus (Michx.) Fourn., sown on same host. 



2. Puccinia Cryptandri Ellis & Barth. Amphispores 

 on Sporobolus cryptandrus (Torr.) A. Gray, sown on same host. 



3. Puccinia obtecta Peck. Teliospores on Scirpus Amer- 

 icanus Pers., sown on Bidens frondosa L., and B. connata Muhl. 



4. Puccinia universalis Arth. Teliospores on Carex 

 stenophylla Wahl., sown on Artemisia dracunculoides Pursh. 



5. Puccinia Phrymae (Halst.) Arth. Teliospores on 

 Carex longirostris Torr., sown on Phryma leptostachya L. 



6. Puccinia mutabilis Ellis & Gall. Teliospores on 

 Allium rcticulatum Fraser, sown on A. recurvatum Rydb. 



7. Gymnosporangium Betheli Kern. Teliospores on 

 Juniperus scopulorum Sarg., sown on Crataegus coccinea L., C. 

 punctata Jacq., C. cordata (Mill.) Ait., and Sorbus Americana 

 Marsh. 



8. Gymnosporangium inconspicuum Kern. Teliospores 

 on Juniperus Utahensis (Engelm.) Lemmon, sown on Amelan- 

 chier erecta Blanch. 



