1963 ] 



LISTS AND KEYS OF THE CEDAR RUSTS OF THE WORLD 



319 



LEGENDS TO FIGURES 



Fig. 1-4. Gymnosporangium, peridia of aecia showing variations in form and dehiscence 

 (all somewhat enlarged). Fig. 1. Aecia cupula te, G. libocedri on Crataegus. Fig. 2. Aecia 

 cornute, G. cornutum on Sorbus. Fig. 3. Aecia lacerate and spreading, G. confusum on Cra- 

 taegus. Fig. 4. Aecia balanoid, G. fuscum on Pyrus (photo by V. Grasso). 



Fig. 5-16. Gymnosporangium. Fig. 5-8. Variations in peridial cells of aecia (after Kern). 

 Fig. 5. Verrucose (in part), G. inconspicuum. Fig. 6. Eugose, G. nidus-avis. Fig. 7. Spinu- 

 lose, G. exiguum. Fig. 8. Smooth, G. hyalinum. Fig. 9-16. Variations in form of teliospores 

 and uredospores. Fig. 9. G. gaeumanni. a. Two uredospores with thin walls; one with thick 

 wall, amphispore. b. Two teliospores (after Zogg). Fig. 10. G. tsingchensis, teliospore with 

 one cell. Fig. 11. G. biseptatum, teliospore with several cells (after Kern). Fig. 12. 

 G. clavipes, teliospore with carotiform pedicel (after Kern). Fig. 13. G. ellisii, telio- 

 spore with linear-fusiform shape, several cells (after Kern). Fig. 14. G. davisii, teliospore 

 with hyaline papillae over the pores (after Kern). Fig. 15. G. multiporum, teliospore with 

 several scattered pores (after Bethel). Fig. 16. G. elavarii forme, teliospores with lanceolate 

 shape, two cells (after Kern). 



Fig. 17-24. Gymnosporangium globosum, aecia] and telial stages. Fig. 17. Several groups 

 of aecia with tubular peridia, becoming lacerate above, on leaf of Crataegus. Fig. 18. A 

 peridium. Fig. 19. A straight, rugose peridial cell. Fig. 20. An aeciospore. Fig. 21. Photo- 

 graph of a globose gall on Juni perns. Fig. 22. Sketch of gall showing scars of telia of pre- 

 vious season. Fig. 23. A wedge-shaped telium. Fig. 24. A teliospore. 



Fig. 25-32. Gymnosporangium juniperi-virginianae, aeeial and telial stages. Fig. 25. An- 

 nular group of aecia with fimbriate and revolute peridia on leaf of Malus (after Kern). Fig. 

 26. Single peridium from above. Fig. 27. Aeciospore showing several pores. Fig. 28. A curved 

 rugose peridial cell. Fig. 29. Subgloboid or reniform galls on Juniperus (after Kern). Fig. 

 30. Sketch of a gall showing collar-like swelling at base of each telium. Fig. 31. A cylindric- 

 acuminate telium. Fig. 32. A teliospore. 



Fig. 33-37. Gymnosporangium, showing varied distribution of sori — four telia, one aecium 

 (after Kern). Fig. 33. Telia foliicolous, pulvinate, G. libocedri. Fig. 34. Telia foliicolous, 

 hemispheric-, G. davisii. Fig. 35. Telia on a gall, irregularly compressed, often confluent, G. 

 nelsoni. Fig. 36. Aecia on a gall, cylindric, G. bermudianum. Fig. 37. Telia on gall-like ex- 

 crescences, terete, somewhat conic, G. corniculans. 



Fig. 38-41. Gymnosporangium, effects on hosts produced by the telial stages. Fig. 38. 

 Telia causing fasciation of the branches, G. Jcernianum (after Kern). Fig. 39. Telia on fusi- 

 form enlargement, applanate, G. exterum (after Kern). Fig. 40. Telia on slight fusiform 

 swellings, pulvinate, G. cornutum (after Oersted). Fig. 41. Telia on irregular enlargement, 

 applanate, G. tremelloides (after Kern). 



Fig. 42, 43. Gymnosporangium elavarii for me, telia on gradual fusiform enlargements, 

 terete or slightly compressed. Fig. 42. Telia mature but dry. Fig. 43. Telia after swelling 

 in moisture. 



