220 



NORTH AMERICAN FLORA 



[VOIvUME 



Telia erumpent or long covered by the epidermis. Teliospores free, pedicelled, one- 

 celled ; wall colored, firm, smooth or verrucosely sculptured, the pore one, apical. 

 Type species, Uredo Betae Pers. (on Beta vulgaris). 



Aecia present and exclusively considered. 



Aecia scattered, from diffused mycelium, often causing etiolation. 

 Aecia on plants same as or related to those bearing later stages. 



Aecia rather loosely scattered. 30. N. Caladii. 



Aecia rather crowded. 



Host belonging to family Euphorbiaceae. 69. N. proeminens. 



Host belonging to family Onagraceae. 72. N. plumbaria. 



Aecia on plants dissimilar and unrelated to those bearing later 



41. N. housioniaia. 



47. N. caryophyllina. 

 58. N. punctata. 



Aecia rather loosely scattered. 

 Aecia rather crowded. 

 Peridial cells abutted. 

 Peridial cells overlapping. 

 Aecia grouped, from limited mycelium, 



Aecia on plants same as or related to those bearing later stages 

 Host belonging to family Melanthaceae. 

 Host belonging to family Alliaceae. 

 Aeciospores globoid (20-24 X 23-26 m). 

 Aeciospores longer than broad (21-26 X 25-35 /*). 

 Host belonging to family lyiliaceae. 

 Host belonging to family Iridaceae. 

 Host belonging to family Polygonaceae. 



Aeciospores small, under 20 /i in diameter. 

 Aeciospores large, over 20 ix in diameter. 

 Host belonging to family Chenopodiaceae. 

 Host belonging to family Caryophyllaceae. 

 Host belonging to family Fabaceae. 



Aeciospores small, under 17^ in breadth. 

 Aeciospores globoid (11-15 X 13-16 m). 

 Aeciospores longer than broad (12-17 X 16-21 /x). 

 Aeciospores medium-sized, 15-21 /x in breadth, ellipsoid. 

 Peridial cells with outer wall thick (6-9 m)- 

 Peridial cells with outer wall moderately thin 



(4-5m). 

 Aeciospores large, 18-24 /i in breadth, globoid. 



Aeciospore-wall moderately thick (1.5-2 /xj. 



Aeciospore-wall thin (1-1.5//). 



Host belonging to family Malpighiaceae. 



Host belonging to family Hypericaceae. 



Host belonging to family Armeriaceae. 



Host belonging to family Rubiaceae. 



Aeciospores ellipsoid (19-24 X 26-30 m). 



Aeciospores globoid (21-26 X 21-28 m). 

 Host belonging to family Carduaceae. 



Aeciospores 15-22 X 18-24 /x. 



Aeciospores 19-24 x 22-26 /x. 

 Aecia on plants dissimilar and unrelated to those bearing later 

 stages. 

 Host belonging to family Chenopodiaceae. 

 Host belonging to family Caryophyllaceae. 

 Host belonging to family Ranunculaceae. 

 Host belonging to family Violaceae. 

 Host belonging to family Ammiaceae. 

 Host belonging to family Primulaceae. 



Aeciospores with wall moderately thin (1.5-2 ju). 



Aeciospores with wall very thin (1/x). 

 Host belonging to family Polemoniaceae. 

 Host belonging to family Plantaginaceae. 

 Host belonging to family Ambrosiaceae. 

 Host belonging to family Carduaceae. 



Host belonging to genus Aster, or Solidago. 



Host belonging to genus Arnica, or Cirsium. 



Host belonging to genus Silphium. 



37. N. Zygadeni 



38. N. aemula. 



39. N. bicolor. 



40. N. Lilii. 



42. N. proba. 



43. N. Polygom. 



44. N. iniricaia. 



45. N. Betae. 

 48. N. Silenes. 



49. N. Lespedezae-procitmbentis. 

 60. N. TrifoUi. 



54. N. Fabae. 



64. N. appendiculata. 



^^. N. Lupini. 



50. N. Hedysari-paniculaii. 

 68. N. Galphimiae. 



71. N. Hyperici-f rondo si. 

 73. N. Limonii. 



79. N. Bouvardiae. 



80. N. Spermacoces . 



82. N. Martinii. 



83, TV. cucutlata. 



19. N. Peckiana. 



20. N. Polemonii. 

 16. N. Poae. 



2. N. pedatata. 

 25. N. Scirpi. 



20. TV. Poletnonit. 

 25. N. Scirpi. 

 20. N. Polemonii. 

 7. N. seditiosa, 

 34. N.Junci. 



28. N. perigyma. 



34. N.Junci. 



35. N. Silphii. 



Uredinia and telia present and exclusively considered. 



Uredinia and telia inhabiting monocotyledonous hosts. 

 Host belonging to family Sparganiaceae. 

 Host belonging to family Poaceae. 

 Urediniospore -pores equatorial. 



Urediniospore-wall moderately thick (2 fx and more). 

 Urediniospores ellipsoid ; wall echinulate. 

 Urediniospores globoid or subgloboid. 



1. N. Sparganii. 



21. N. argiita. 



