222 NORTH AMERICAN FLORA [V01.UME 7 



Urediniospores verrucose ; pores 4, equatorial. 43. TV. Polygoni. 



XJre d in io spores echinulate ; pores 3-6, scattered. 44. N. intricata. 



Host belonging to family Chenopodiaceae. 45. N. Betae. 



Host belonging to family Amaranthaceae. 46. N. Celosiae. 

 Host belonging to family Caryophyllaceae. 



Teliospore-wall evenly thick ; pedicel fragile. 47. N. caryophyllina. 



Teliospore-wall much thicker above ; pedicel persistent. 4S. N. Silenes. 

 Host belonging to family Fabaceae. 



Teliospores globoid, ellipsoid, or obovoid. 



Teliospore-wall greatly thickened above, 5-12 ju ; pedicels 

 persistent. 



Uredinia with encircling paraphyses. 



Paraphyses numerous, incurved, prominent. 49. N. Lespedezae-procumbentis.. 



Paraphyses few, straight, inconspicuous. 50. N. Hedysari-paniculati. 



Uredinia without encircling paraphyses. 



Urediniospore-pores 3 or 4, approximately equa- 

 torial. 



Teliospores with pedicels very long. 51. N. mexicana. 



Teliospores with pedicels twice length of spore 

 or less, 

 Teliospores rounded above and below. 53. N. Indigoferae. 



Teliospores narrowed above and below. 54. N. Fabae. 



Urediniospore-pores scattered. 



Pores 3 or 4 (.some also equatorial). 54. iV. Fabae. 



Pores 6-8. 55. N. Lupini. 



Teliospore-wall slightly or not thickened above ; pedicels 

 fragile. 



Urediniospore-pores scattered, 6-8. 



Teliospores evenly verrucose. 56. N. occiden talis . 



Teliospores striately verrucose. 57. N. substriata. 



Urediniospore-pores scattered, 3-6 (in occasional 

 spores equatorial). 

 Teliospores finely and evenly verrucose. 58. N. punctata. 



Teliospores with a few fine verrucose beads, or 

 smooth. 59. N. fallens. 



Urediniospore-pores equatorial, 3 or 4. 



Teliospores smooth or with a few fine verrucose 



beads. 60. N. Trifolii. 



Teliospores evenly verrucose. 

 Teliospore-wall thin, X.5~2fx. 



Apex of teliospore with hyaline papilla. 61. N. Coluieae. 



Apex of teliospore with low umbo. 62. N. Cologaniae. 



Teliospore-wall thick, 3-4 /x. 52. N. tenuistipes. 



Teliospores striately verrucose. 63. N. Medicaginis. 



Urediniospore-pores equatorial, 2 (in occasional 

 spores 3 ) . 

 Teliospores with a few fine verrucose beads. 64. TV", appendiculata. 



Teliospores evenly and minutely verrucose. 65. N. Clitoriae, 



Teliospores lanceolate or narrowly ellipsoid. 



Urediniospores sparsely echinulate, pores 3, equatorial. 66. N. Neurocarpi. 

 Urediniospores closely echinulate, pores 4, equatorial. 67. JV. Dolichi. 

 Host belonging to family Malpighiaceae. 68. N. Galphimiae. 



Host belonging to family Kuphorbiaceae. 69. N. pro'eminens. 



Host belonging to family Rhamnaceae. 70. N. Gouaniae. 



Host belonging to family Hypericaceae, 71. A^. Hyperici-f rondo si. 



Host belonging to family Onagraceae. 72. A^. plumbaria. 



Host belonging to family Armeriaceae. 73. N. Limonii. 



Host belonging to family Gentianaceae. 



Urediniospores with 3-6 scattered (rarely equatorial) pores. 74. N, speciosa. 

 Urediniospores with 4 equatorial pores. 75. N. Gentianae. 



Host belonging to family Asclepiadaceae. 76. N. Howei. 



Host belonging to family Solanaceae. 77. N. Solani. 



Host belonging to family Acanthaceae. 78. TV. Ruelliae. 



Host belonging to family Rubiaceae. 



Teliospore-wall very thick, over 6 ju- 79. TV. Bouvardiae. 



Teliospore-wall moderately thick, 2-3 /i. 80. TV. Spermcoces. 



Host belonging to family Cucurbitaceae. 81. TV. Helle-nana. 



Host belonging to family Carduaceae. 



Teliospore-wall moderately thick (2.5-3 m), indistinctly 



verrucose. 82. TV. Martinii. 



Teliospore-wall thick (4-5/*), coarsely verrucose. 83. TV. cucullaia. 



1. Nigredo Sparganii (Cooke & Peck) Arthur. 



Uromyces Sparganii Cooke & Peck ; Peck, Ann. Rep. N. Y. State Mus. 26 : 77. 1874. 



O and I. Pycnia and aecia unknown. 



II. Uredinia amphigenous, scattered or sometimes somewhat grouped, oval or oblong, 



