Sept. 1907] Cultures of Uredincae in ipo6 193 



with no infection. What was doubtless the same rust, and also 

 from western New York, was sown in 1905 on two other species 

 of hosts with negative results.'^ 



This rust has heretofore been considered to belong to Uromy- 

 ces J unci (Desm.) Tul., but recent study has shown that it is 

 morphologically quite distinct from that species, especially as it 

 has urediniospores that are echinulate and four-pored, instead of 

 verrucose and two-pored, as in the European species, which by 

 the way apparently does not occur in the United States east of 

 Nebraska and Kansas. It was described by Schweinitz (Trans. 

 Am. Phil. Soc. 4:2^^. 1832.) as a new species under the name 

 Puccinia Junci. As that specific name is not now available, I 

 suggest that the species be called Uromyces effusus, in allusion to 

 the copious distribution of the sori over the surface of the host, 

 and would characterize it as follows : 



Uromyces effusus sp. nov. 



O and I. Pycnia and aecia unknown. 



II. Uredinia amphigenous. scattered, oblong or linear, 0.1-0.3 mm. 

 wide by 0..3-1.5 mm. long, tardily naked, dark cinnamon-brown, ruptured 

 epidermis very conspicuous ; urediniospores broadly ellipsoid or oval, 14-19 

 by 18-26 M, wall light yellow about 1.5m thick, rather sparingly and bluntly 

 echinulate, pores 4, equatorial. 



III. Telia amphigenous, numerous, scattered, oblong or linear, 0.2- 

 0.5 mm. wide by 0.3-2 mm. or more long, rarely confluent, finally naked, 

 ruptured epidermiis very conspicuous; teliospores obovate or broadly oval, 

 13-19 by 24-33 m. obtuse or rarely acute at apex, usually narrowed below ; 

 wall chestnut-brown, 1.5-2/^ thick, much thicker above, 6-10 M, smooth; 

 pedicel tinted, about as long as the spore. 



On J uncus effusus L. Type collected by L. von Schweinitz at Beth- 

 lehem, Pa. Collections in the writer's herbarium from Ohio, New York, 

 West Virginia, and Maryland, and in the herbarium of the New York 

 Botanical Garden from New Jersey, Massachusetts and South Carolina. 

 It is also found in the following exsiccati : Ellis, N. Am. Fungi. 238; 

 Ellis & Ev.. Fungi Columb. .339 ; Ravenel, Fungi Am. 51 ; Shear, N. Y. 

 Fungi 76 ; Kellerm., Ohio Fungi 38. 



8. Uromyces Eleocharidis Arth. on Eleocharis palustris 

 (L.) R. & S., sent by Mr. E. Bartholomew^ from Stockton, Kan., 

 was sown on Callirrhoe involucrata, Napaea dioica, Cassia Cha- 

 maecrista, Myosotis palustris, and Silphium perfoliatum, with no 

 infection. 



9. Uromyces acuminatus Arth. on Spartina cynosuroides 

 Willd., obtained at Fair Oaks. Ind. by Mr. F. D. Kern, was 

 sown four times on Steironema ciliatuni, twice on 5*. lanceolatiim, 

 twice on Lysimachia quadrifolia L., and once each on L. terrestris, 

 Polygala Senega, Napaea dioica and Houstouia purpurea, with no 

 infection. As teliosporic material of this rust, obtained from Ne- 

 braska, was sown on Steironema ciliatiim with success in 1905,' 



'See Jour. Myc. /<?:1.3. 1906. 

 ' See Jour. Myc. 12 :24. 1906. 



