242 NORTH AMERICAN FLORA [Vor^UMK 



Allium validum S. Wats., California, Idaho. 

 Allium unifolium Kellogg, California. 



Type locality: Near Mineral King, Sierra Nevada, Tulare County, California, on Allium 

 validum. 



Distribution : Local, across the continent from Massachusetts to California. 

 ExsicCATi: Sydow, Ured. 1102, 1351; Ellis & EJv, N. Am. Fungi JJ^-// Ellis & Ev. Fungi 

 Columb. 861; Earth. Fungi Columb. 2491; Earth. N. Am. Ured. 185; Vesterg. Micr. Rar. Sel. 988. 



40. Nigredo Lilii (G. W. Clinton) Arth. R&ult. Sci. Congr. Bot. 



Vienne 344. 1906. 



Uromyces Lilii G. W. Clinton ; Peck, Ann. Rep. N. Y. State Mus. 27 : 103. 1875. 

 Uromyces Holwayi Lagerh. Hedwigia 28 : 108. 1889. 

 Caeovturus Holwayi Kuntze, Rev. Gen. 3^ : 450. 1898. 

 Caeomurus Lilii Kuntze, Rev. Gen. 3^* : 450. 1898. 



0. Pycnia chiefly hypophyllous, widely separated in groups 2-3 mm. across, not con- 

 spicuous, honey-yellow becoming brownish, globoid, 100-125^ in diameter ; ostiolar fila- 

 ments 50-60 ju long. 



1. Aecia chiefly hypophyllous, gregarious, in groups 3-5 mm. across, short, cupulate, 

 0.4-0.7 mm. in diameter ; peridium colorless, the margin erect, erose ; peridial cells linear- 

 rhomboidal, 32-42 /x long, the walls of about equal thickness, 2-3 ^u, the inner wall moder- 

 ately verrucose ; aeciospores globoid, 14-19 by 16-22 ju ; wall colorless, thin, 1 /i, flnely ver- 

 rucose. 



II. Uredinia amphigenous, gregarious or occasionally solitary, roundish or oval, 0.3- 

 0.6 mm. across, rather tardily naked, pulverulent, cinnamon-brown, ruptured epidermis 

 conspicuous; urediniospores broadly ellipsoid or obovoid, 20-26 by 23-30 ju; wall light 

 cinnamon-brown, rather thick, 2.5-3 ju, sparsely and rather finely verrucose-echinulate, 

 the pores 2 or 3, approximately equatorial. 



III. Telia amphigenous, widely separated in irregular groups Z-l mm. across, rather 

 tardily naked, pulvinate, chocolate-brown, ruptured epidermis conspicuous ; teliospores 

 broadly ellipsoid or obovate-ellipsoid, 18-25 by 29-39 ju ; wall chestnut-brown, 2-2.5 /i thick, 

 with a small tinted apiculus, 5-7 ju, moderately rugose with longitudinal parallel ridges, 

 sometimes appearing almost smooth when wet ; pedicel hyaline, very short. 



On Liliaceae : 



Lilium canadense'L,., Connecticut, Maine, Massachusetts, New Jersey, New York, Wisconsin. 



Lilium candidum. L., Connecticut. 



Lilium columbianum Hanson, California, Washington ; British Columbia. 



Lilium. pardalinum. Kellogg, California. 



Lilium, parvum. Kellogg, California. 



Lilium philadelphicum. L,., Massachusetts, New Hampshire, New York. 



Lilium rubescens S. Wats., California. 



Lilium- superbum. L., Iowa, Michigan, Minnesota, Wisconsin ; Ontario. 



Lilium, umbellatum. Pursh, Nebraska. 



Lilium- Washingtonianum Kellogg, California. 

 Type locality : Buffalo, New York, on Lilium, canadense. 



Distribution : From Maine and New York westward to Nebraska, and along the Pacific 

 coast from British Columbia southward to central California. 



KxsiCCATi: Ellis, N. Am. Fungi 1072; Ellis & Ev. N. Am. Fungi 1864b, 3241; Seym. & 

 Earle, Econ. Fungi Suppl. B4; Sydow, Ured. 753, 1759 ; Barth. N. Am. Ured. 187. 



41. Nigredo houstoniata (Schw.) J. Sheldon, Torreya 9 : 55. 1909. 



Caeoma {Aecidium) houstoniaium Schw. Trans. Am. Phil. Soc. II. 4: 293. 1832. 

 Aecidium, {Caeoma) houstoniaium Schw. Trans. Am. Phil. Soc. II. 4: 309, 1832. 

 lAecidium cylindricum Ellis & Ev. Bull. Torrey Club 22 : 61. 1895. 

 Uromyces Murrillii Ricker, Mycologia 1 : 237, hyponym. 1909. 

 Uromyces housioniatus J. Sheldon, Torreya 9 : €s. 1909. 



0. Pycnia hypophyllous, sometimes occupying the whole under surface of a leaf, 

 numerous, not conspicuous, pale-yellow becoming reddish-brown, globoid or slightly 

 ■depressed-globose, 80-100 /x in diameter, 65-80 m bigh ; ostiolar filaments 45-65 /i long. 



1. Aecia hypophyllous, loosely scattered, often occupying the whole under surface of a 

 leaf, short, cupulate, 0.2-0.4 mm. in diameter ; peridium colorless, the margin rather finely 

 erose ; peridial cells rhomboidal, 19-26 /t long, the outer wall rather thick, 4-6 ju, transversely 

 .striate, the inner wall slightly thinner, 3-4/t, moderately verrucose ; aeciospores globoid, 

 13-18 by 16-19 ju; wall colorless, thin, Iju, finely verrucose. 



