NORTH AMERICAN FLORA [Volume 7 



III. Telia hypophyllous, scattered, oval or oblong, 0,2-0.5 mm. long, rather early naked, 

 pulvinate, dark chestnut-brown, ruptured epidermis noticeable ; teliospores obovoid, 13-16 

 by 19-27 ju,, usually rounded above and narrowed below ; wall cinnamon-brown, usually with 

 a slightly paler umbo, thin, about 1 ju, thicker at apex, 4-7 m, smooth ; pedicel slightly tinted, 

 about length of spore or less. 



On Cyperaceae : 



Carex gracillima Schw., Wisconsin. 



Carex tenuis Rudge (C debilis Rudgei Bailey), Connecticut. 

 Type locality : Central Village. Connecticut, on Carex debilis Rudgei. 



Distribution : Known only from two localities, but probably local from New Kngland to 

 Wisconsin. 



Illustration: Rhodora 12 : Vlb^f.l. 



30. Nigredo Caladii (Schw.) Arth. Result. Sci. Congr. Bot. 



Vienne 343. 1906. 



Aecidium Caladii Schw. Schr. Nat. Ges. Leipzig 1 : 69. 1822. 



Uredo Caladii Schw. Schr. Nat. Ges. I^eipzig 1 : 71. 1822. 



Caeoma Caladii Link, in Willd. Sp. PI. 62 : 9. 1825. 



Caeoma aroidatum Link, in Willd. Sp. PI. 6^ : 43. 1825. 



Caeoma [Uredo) Ari-virginici Schw. Trans. Am. Phil. Soc. II. 4: 291. 1832. 



Caeoma {Aecidium) dracontionatum- Schw. Trans. Am. Phil. Soc. II. 4: 292. 1832. 



Puccinia Ari-triphylli Schw. Trans. Am. Phil. Soc. II. 4 : 297. 1832. 



Aeciditcm I Caeofna) aroidatum Schw. Trans. Am. Phil. Soc. II, 4: 309. 1832. 



Aecidium, {Caeom^a) dracontionatum. Schw. Trans. Am. Phil. Soc. II. 4: 309. 1832. 



Uromyces Peltandrae Howe, Bull. Torrey Club 5 : 3. 1874. 



Uromyces Ari-virginici Howe, Bull. Torrey Club 5 : 43. 1874. 



Uromyces Arisaemae Cooke, Bull. Torrey Club 6 : 32. 1875. 



Uromyces Caladii Farl.; Ellis, N. Am. Fungi 232. 1879. 



Aecidium. importatum P. Henn. Verh. Bot. Ver. Brand. 37 : xxv. 1896. 



Caeomurus Caladii Kuntze, Rev. Gen. 3^ : 449. 1898. 



0. Pycnia from a perennial mycelium, chiefly hypophyllous, sometimes occurring also 

 on the floral parts, evenly and extensively scattered over large areas, preceding or accom- 

 panying the aecia, abundant, punctiform, noticeable, half immersed, honey-yellow becom- 

 ing brownish, globose, 100-160 ju in diameter, 96-128 ju high ; ostiolar filaments rather short, 



35-50 M- 



1. Aecia from a perennial mycelium, chiefly hypophyllous, rather evenly and exten- 

 sively scattered, short, becoming cupulate, about 0.2-0.4 mm. in diameter ; peridium color- 

 less, the margin erect or somewhat spreading and recurved, finely eroded or sparingly 

 lacerate; peridial cells oblong or-slightly rhomboidal, about 23-32jLt long, 15-19^ thick, the 

 inner wall moderately verrucose, 3-4 ju, the outer wall inconspicuously striate, 6-8 m ; aecio- 

 spores subglobose or ellipsoid, 15-20 by 17-24 ju ; wall pale-yellow, moderately thin, about 

 1.5 m, evenly and finely verrucose. 



II. Uredinia amphigenous, scattered, roundish, 0.5-0.8 mm. across, rather tardily 

 naked, light cinnamon-brown, ruptured epidermis conspicuous; urediniospores ellipsoid, 

 obovoid, or sometimes almost cuneiform, 15-24 by 24-35 m, rounded above, often narrowed 

 below; wall pale cinnamon-brown, 1. 5-2 ^ thick, somewhat thicker above, 3-5 ja, strongly 

 and rather sparingly echinulate, the pores 4, equatorial. 



III. Telia amphigenous, scattered, roundish or often irregular, rather tardily naked, 

 light chestnut-brown, ruptured epidermis conspicuous ; teliospores ellipsoid or obovoid, 

 17-24 by 23-35 jLt, rounded or obtuse above and below ; wall cinnamon-brown, 1.5-2/1 thick, 

 with a small hyaline papilla at apex, 3-5 /a, smooth ; pedicel hyaline, short, deciduous. 



On Araceae : 



Arisaema macrospathum Benth., Morelos. 



Arisaema triphyltum (L.) Schott {Arum, triphyllum L.), Connecticut, Delaware, District 

 of Columbia, Florida, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Massachu- 

 setts, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New 

 York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, South 

 Dakota, Vermont, West Virginia, Wisconsin ; Nova Scotia, Ontario. 



Muricauda Dracontium (L-) Small (Arisaema I?raco7itium Schott) ^ Alabama, Arkansas, 

 Florida, Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Mississippi, Missouri, 

 Nebraska, New York, North Carolina, Ohio, Pennsylvania, Texas, West Virginia; 

 Ontario. 



Peltandra glauca (E11-) Feay {P. sagittae/olia Morong not Raf., Caladium sagittifoliutn 

 Nutt. not Vent. , Xanthosoma sagiitifolium Chapm. not Schott) , Georgia, North Carolina. 



