1963] 



LISTS AND KEYS OF THE CEDAR RUSTS OF THE WORLD 



313 



tu rkestanicum. 



padmarense. 



corn u turn. 



hyalinum. 

 amelanchieris. 

 clavipes. 

 confuswm or fuscum. 



1. 



21. Telia pulvinate, crowded, often confluent. 

 Telia caulicolous, on fusiform enlargements. 

 27. Enlargements slight, mostly on smaller branches. 

 28. Telia cylindrical, teliospores 2-celled. 

 28. Telia applanate, teliospores with pedicels terete. 

 29. Teliospores with hyaline papillae over the pores. 

 29. Teliospores without hyaline papillae. 



30. Teliospores with wall thicker above (3-5 fi). 

 30. Teliospores with wall uniform. 

 28. Telia hemispheric, teliospores with pedicels carotiform. 

 28. Telia conic, or laterally compressed. 

 27. Enlargements irregularly fusiform, knot-like or gall-like on larger branches 

 31. Telia applanate. 



32. Teliospores 1-3-celled (40-80 fi long). 

 32. Teliospores 2-celled (40-60 /a long). 

 31. Telia wedge-shaped (sori also on galls, and foliicolous) . 

 27. Enlargements gradually fusiform, mostly on woody branches. 

 33. Telia hemispheric mostly small and definite. 

 34. Teliospores 2-4-celled. 

 34. Teliospores 2-celled. 



35. Pores 2, near the septum, or three in upper cell, 1 apical 

 35. Pores usually 4 in a band near the septum, or with 1 or 2 additional in 



each cell. atlanticum 

 33. Telia applanate, or pulvinate, usually large and indefinite. 

 36. Teliospores small, 32-42 fi long. 



36. Teliospores large, 45-60 fi long. 

 33. Telia terete, eylindric, or slightly compressed. 

 33. Telia cristifonn, irregularly crenate above. 

 33. Telia conic, or laterally compressed. 



37. Teliospores 1 -celled. 

 37. Teliospores 2-celled. 



38. Teliospores ellipsoid, 42-51 /i long. 



38. Teliospores fusiform, falcate or sigmoid, 46-90 fi long. 

 33. Telia tongue-shaped, often crenate above. 

 33. Telia wedge-shaped, often irregular and lacunose. 



39. Teliospores medium-sized (42-55 /x long) . effusum 

 39. Teliospores rather large (44-67 /i long) . japonicum 

 Telia caulicolous, on larger branches, or main trunk, often with some hypertrophy. 



miyabei. 

 ire melloides. 

 betheli. 



biseptatu m. 



nidus-avis. 



extern m. 

 min us. 

 clavarii forme, 

 speciosum. 



tsingchensis. 



con fit sum or fuscum. 



fusisporum. 

 cupressi. 



40. Telia pulvinate. 



40. Telia laterally compressed. 



41. Teliospores 1-celled, telia dentiform. 

 41. Teliospores 2-celled. 



42. Telia tongue-shaped, crenate, 4-6 mm high. 

 42. Telia wedge-shaped, 3-4 mm high. 

 42. Telia often irregular and lacunose, 7-10 mm high. 

 41. Teliospores 2-3-celled, telia cristiform. 



meridissimu m. 



tsingchensis. 



cupressi. 



bethdi. 

 effusum. 

 speciosum. 



HOST KEYS 



Hosts Harboring Aecial Phase 



On Amelanchier 



1. Aecia aeeidioid. 

 1. Aecia roestelioid. 



2. Peridium retaining tubular form, not much altered by dehiscence. 

 3. Peridium dehiscent at apex, slightly or not lacerate. 

 4. Peridial cells verrucose. 



5. Side walls of peridial cells verrucose on inner third. 

 5. Side walls of peridial cells verrucose over entire surface. 

 4. Peridial cells rugose. 



4.. Peridial cells semi-rugose, with elongated papillae. 

 4. Peridial cells spinulose. 



libocedri. 



inconspicuum. 

 harlnessianum. 



amelanchieris. 

 nelsoni. 

 guatemalianum. 



