266 NORTH AMERICAN FLORA [V01.UMK 7 



III. Telia chiefly epiphyllous, numerous, scattered, roundish, 0.1-0.3 mm. across, 

 tardily naked, pulverulent, chocolate- brown or blackish, ruptured epidermis conspicuous ; 

 teliospores broadly ellipsoid, often angular, 20-32 by 30-40 m; wall chocolate-brown, thick, 

 3-4 /i, thickened at apex, 7-9 ju, coarsely verrucosa: pedicel colorless, rather thick, once to 

 once and a half length of spore. 



On Acanthaceae : 



Beloperone californica Benth., California ; Lower California. 



Ruellia sp., Morelos, San Luis Potosi. 

 Type locality : Cardenas, Mexico, on Ruellia sp. 

 Distribution : Southern California southward to central Mexico. 

 Illustration : Sydow, Monog. Ured. 2 : pi. 2,f. 25. 



79. Nigredo Bouvardiae (Sydow) Arthur. 



Uromyces Bouvardiae Sydow, Ann. Myc. 1 : 16. 1903. 



0. Pycnia amphigenous, few, in groups 0.2-0.4 mm. across, honey-yellow, becoming 

 brownish, depressed-globoid, 70-170 ^ in diameter by 60-120 y. high ; ostiolar filaments 

 about 50 jLt long. 



1. Aecia chiefly hypophyllous, gregarious, in orbicular groups 0.7-2 mm. across ; 

 peridium not seen ; peridial cells rhomboidal, 35-50 /i long, the outer wall rather thick, 

 5-7 ju, transversely striate, the inner wall thick, 7-9 /x, verrucose; aeciospores broadly 

 ellipsoid or subglobose, 19-23 by 23-27 y. ; wall colorless, thin, 1-1.5 /z, finely verrucose. 



II. Uredinia chiefly epiphyllous, scattered, roundish or oval, 0.2-0.8 mm. across, 

 rather soon naked, pulverulent, cinnamon -brown, ruptured epidermis conspicuous; 

 urediniospores broadly ellipsoid or obovoid, 19-26 by 22-34 ju; wall golden-brown, 1.5-2.5 /x 

 thick, sparsely and sharply echinulate, the pores 2, rarely 3, equatorial. 



III. Telia chiefly epiphyllous, scattered, roundish or oval, 0.3-1 mm. across, rather 

 early naked, pulverulent, blackish, ruptured epidermis noticeable ; teliospores broadly 

 ellipsoid or subglobose, 29-35 by 34-48 jit, usually rounded both above and below ; wall 

 chocolate-brown, thick, 5-8 ju, with a broad, low, semi-hyaline umbo making the wall 

 9-12 fx thick above, rather finely verrucose; pedicel colorless, about twice length of the 

 spore, 8-12 ju in diameter next to the spore, the lower part considerably roughened and 

 very slightly swollen, in some specimens only slightly roughened and swollen up to 25^ 

 in diameter. 



On Rubiaceae : 



Bouvardia hirtella H.B.K., Michoacan. 



Bouvardia leiantha Benth., Oaxaca; Guatemala. 



Bouvardia versicolor Ker, Jalisco. 



Bouvardia sp., Morelos. 

 Type locality : Jumaytepeque, Depart. Santa Rosa, Guatemala, on Bouvardia leiantha. 

 Distribution: From central Mexico southward into Guatemala, 

 HxsicCATi : Vesterg. Micr. Rar. Sel. 1132; Barth. N. Am. Ured. 186,382. 



J 



80. Nigredo Spermacoces (Schw.) Arthur. 



Puccinia Spermacoces Schw. Schr. Nat. Ges. Leipzig 1 : 74. 1822. 

 Caeoma Spermacoces I.ink, in Willd. Sp. PI- &^ : 21. 1825. 

 Uromyces Spermacoces M. A. Curt. Cat. PI. N. Car. 123. 1867. 

 Aecidium Diodiae Burrill, Bull. 111. Lab. Nat. Hist. 2 : 228. 1885. 



0. Pycnia epiphyllous, few, gregarious, inconspicuous, yellowish, becoming darker 

 with age, globoid, 120-140 /z; ostiolar filaments apparently rather short. 



1. Aecia hypophyllous, crowded in irregular groups 1-2.5 mm. across, short, cupulate, 

 0.2-0.3 mm. in diameter; peridium colorless, erect, the margin lacerate; peridial cells 

 rhomboidal, 13-19 by 26-34 m, somewhat overlapping, the outer wall 4-6 m thick, trans- 

 versely striate, the inner wall 3-5 /x thick, rather coarsely verrucose; aeciospores globoid, 

 21-26 by 21-28 m; wall colorless, 1-1.5 ju, inconspicuously verrucose. 



II. Uredinia chiefly epiphyllous, numerous, scattered, roundish, 0.2-0,5 mm. across, 

 tardily naked, pulverulent, light cinnamon-brown, the overarching epidermis ruptured by 

 an uneven slit; urediniospores broadly ellipsoid, 18-24 by 26-32 jit ; wall golden-brown, 1-2//, 

 rather finely echinulate, the pores 2, opposite, equatorial. 



