Part 3, 1912] ABCIDIACEAB 267 



Til. Telia amphigenous and caulicolous. numerous, scattered, crowded and confluent 

 on stems, roundish or oval, 0.2-1 mm. across, rather early naked, compact, pulvinate, 

 blackish, ruptured epidermis at first conspicuous, later disappearing; teliospores broadly 

 ellipsoid, 19-27 by 29-37 m; wall dark chestnut- brown, thick, 2-3 m, with a lighter-colored 

 broad cap making the wall at the apex 6-IOm thick, smooth ; pedicel light-yellow, usually 

 persistent, uniform, about twice the length of the spore. 



On Rubiaceae : 



Bio^a teres Walt. {Spermacoce diodina Michx. ) , Arkansas, Delaware, District of Columbia, 

 Florida, Georgia, Illinois, Kansas, Mississippi, Missouri, New Jersey, North Carolina, 

 South Carolina, Tennessee, Texas, West Virginia. 



Type locality : North Carolina, on Spermacoce sp. 



Distribution : New Jersey to Kansas and southward to Florida and Texas. 



ExsiccATi: EUis, N. Am. Fungi 1070; EUis & Ev. Fungi Columb. 477, 1704; Earth. Fungi 

 Qohxmh . 2697 , 2899 ; Rab.-Wint.-Paz. Fungi Bur. ^PJ2ff, 6; Rav. Fungi Am. 56?/ Thiam. Myc. Univ. 

 242; Seym. & Earle, Econ. Fungi 2.?c?, 289a, b. 



81, Nigredo Helleriana Arthur. 



Uromyces Hellerianus Arth. Bull. Torrey Club 31 : 2. 1904. 



O and I. Pycnia and aecia unknown. 



II. Uredinia hypophyllous, round, 0.3-0.5 mm. across, early naked, pulverulent, dark 

 cinnamon -brown, ruptured epidermis inconspicuous ; urediniospores globoid, sometimes 

 triangular-globoid, 16-23 by 19-26m; wall cinnamon-brown, thin, 1-1.5 /x, finely and 

 sparsely echinulate, the pores 2, below the equator. 



III. Telia hypophyllous, round, 0.2-0.7 mm. across, early naked, pulverulent, pul- 

 vinate, dark chestnut-brown, ruptured epidermis inconspicuous ; teliospores globoid to 

 ovoid, 21-24 by 27-36 )Lt, rounded at both ends; wall smooth, chestnut-brown, thick, 3 Mi 

 the apex with a prominent, hyaline umbo, 7-11 ^ ; pedicel one half to once the length of 

 spore, very delicate, colorless. 



On Cucurbitaceae : 



Cayaponia racemosa (Sw.) Cogn., Guatemala ; Porto Rico. 

 Type locality : Near Ponce, Porto Rico, on Cayaponia racemosa. 

 Distribution : West Indies and Central America. 



82. Nigredo Martinii (Farl.) Arth. Result. Sci. Congr. 



Bot. Vienne 344. 1906. 



Uromyces Martinii Farl. Proc. Am. Acad. 18 : 78. 1883. 



0. Pycnia epiphyllous, crowded in small groups, punctiform, golden-brown, rather 

 noticeable, globoid, 130-150 ju broad ; ostiolar filaments long, about 75 y.. 



1. Aecia hypophyllous, crowded in small orbicular groups, at first bright-orange; 

 peridium broad, cupulate, the margin erect, erose ; peridial cells , linear-rhomboidal, 

 25-30 ju long, the outer and inner walls of about equal thickness, 2-3 m, the inner finely 

 verrucose; aeciospores globoid or elliptical-globoid, 15-22 by 18-24 ju; wall pale-yellowish, 



thin, 1-1.5 M, closely and strongly verrucose. 



II. Uredinia amphigenous, evenly scattered, round, 0.5 mm. across, early naked, pul- 

 verulent, dark cinnamon-brown, ruptured epidermis noticeable; urediniospores obovate- 

 globoid, 18-21 by 19-23 ju; wall pale cinnamon-brown, thin, 1-1.5 ju, moderately and incon- 

 spicuously echinulate, the pores 2, equatorial. 



III. Telia amphigenous, scattered, round, 0.5 mm. across, soon naked, somewhat pul- 

 verulent, chocolate-brown, ruptured epidermis inconspicuous ; teliospores globoid, 20-26 

 by 23-29 m; wall light chestnut-brown, thick, 2.5-3 ju, the apex much thicker, 7-9 m, with 

 a more or less evident semi-hyaline umbo, moderately and indistinctly verrucose ; pedicel 

 colorless, slender, once the length of spore, or less. 



On Carduaceae : . ^ ,^- i. ^ t?i -a 



Melanthera nivea (L.) Small iM. hasiata Michx.), Florida. 



Melanthera parvifolia Small, Florida. 

 Type locality : Florida, on Melanthera hastata. 

 "nT<;TRiBnTiON • Peninsula and keys of Florida. 

 Kxsiccati : Kllis, N. Am. Fungi 1067, 1068; Rab.-Wint.-Paz. Fungi Eur. 3722, 3723. 



