Part 1, 1906] 



USTlIyAGINACBAB 



25 



1. ^. Sorghi. 



veloped in a somewhat centripetal manner as in CintracHa, small to medium in size * 

 germination as in Ustilago. ' 



Type, Uredo Hydropiperis Sclium. 



Spores olive- or reddish-brown. 



Sori in ovaries. (Often at base of spike in no. 4.) 

 Spores 5-8 M- in length, smooth. 

 Spores chiefly 8-12 ft in length. 

 Spores apparently smooth. 

 Sori linear. 



Host : A ndropogon . 



|lost: Sorghasirum {Chrysopogon) . 

 Sori oblong to ovate. 

 Spores minutely verruculose. 



Host: Heteropogon {Andropogon) . 

 Host: Echinochloa, Syntherisma, Panicum, 

 Host: Chaeiochloa {Setaria) . 

 Spores chiefly 12-17 m in length. 

 Sori involving or aborting the entire inflorescence. 

 Sori linear to oblong. 



Sori 10-30 mm. in length. 

 Spores 7-10 jiA in length. 

 Spores 12-15 ft in length. 

 Host: Muhlenbergia . 

 Host : Eragrosiis. 

 Sori 40-150 mm. in length. 

 Spores 6-8 M- in length. 

 Spores 7-10 ^ in length. 

 Spores 9-13 m- in length. 

 Sori forming very prominent irregular masses. 

 Spores lilac-tinted to purplish, 8-17 ft in length. 



2. S. Seymouriana. 



3. 5". Chtysopogonis, 



4. S. Nealii. 



5. S. Tfionilifera. 



6. 5". dipiospora. 



7. S. pam-Parum. 



8. ^S". occidentalis. 



9. S. Ischaewii. 



13. S. Tnontaniensis. 



14. 5. strangulans. 



11. 5". Panici-leucophaei. 

 10. S, Paspali-notati. 



12. 5*. Andropogonis-hirtifolii 



15. S. Reiliana. 



16. S. Hydropiperis. 



1. Sphacelotheca Sorghi (Ivink) Clinton, Jour. Myc. 8 : 140. 1902. 



SpoHsorium Sorghi I,ink, in WiUd. Sp. PI. 6^ : 86. 1825. 



Tilletia Sorghi-vulgaris-^vX. Ann. Sci. Nat. III. 7: 116. 1847. 



Ustilago Sorghi Pass. ; Thiim. Hedwigia 12: 114. 1873. 



Ustilago Tulas7iei Ktihn, Ber. Sitz. Nat. Ges. Halle 1874: 5. 1874. 



Ciniractia Sorghi-vulgaris Clinton, Bull. 111. Agr. Bxp. Sta. 47: 404. 1897. 



Sori usually in the ovaries or the essential organs, forming oblong to ovate bodies 3-12 

 mm. in length, rarely fusing the very young spikelets into irregular forms, protected for 

 some time by a false membrane but upon rupture the olive-brown spore-mass becoming 

 scattered, leaving naked the distinct columella of plant tissue ; sterile cells of membrane 

 breaking up somewhat into groups, hyaline, oblong to subspherical , chiefly 7-18 /i in length ; 

 spores subspherical to spherical, smooth, contents often granular, 5.5-8.5 /^ in diameter. 



On Poaceae : 



Sorghum halepense, Cuba. 



Sorghum vulgare, Alabama, California, Connecticut, District of Columbia, Illinois, Iowa, 

 Kansas, Nebraska, New Jersey, New York, Ohio, Oklahoma, South Dakota, Wis- 

 consin ; Ontario ; Jamaica ; Cuba. 

 Type locality : Kgypt, on Sorghum vulgare. 

 Distribution : New England and Ontario to California, Alabama, Jamaica and Cuba; also in 



Europe, Asia and Africa. 



Illustrations; Ann. Sci. Nat. III. 1:pl.5yf. 17-22; Trans. Acad. Sci. St. I,ouis 7: pi. 

 25, f. 1-5; Bun. HI. Agr. Bxp. Sta. 47 : pL 1-5; 57 : pi. E, M, JV, PI, U; BuH. Conn. Geol. Nat. 

 Hist. Surv. 5:/.J, 2^, 2(5, J^/ K. & P. Nat. Pfl. 1^** : 9,/.5,n,E; Vlora. 83 : pi. J,/. S ; Brefeld, 

 Unters. Gesammt. Myk. 12 : pt. 7, /. 19-22; Bun. Kan. Agr. Exp. Sta. 23 : pi. 2; Bull. Soc. Bot. 



France 42 : 37, /. a~e. 



KxsiccATi : Kellerm. Ohio Fungi 4-7 ; Ellis, N. Am. Fungi 1496 ; Ellis & Ev. Fungi Columb. 

 9S2, 1483; Seym. & Earle, Econ. :Pungi 545 , C 46 , C47, C 48 ; Sydow, Ust. 117 ; Griff. West Am. 



Fungi 213. 



2. Sphacelotheca Seymouriana Clinton, Proc. Bost. Soc. Nat. Hist. 



31 : 387. 1904. 



Sori in ovaries, forming linear bodies 4-7 mm. long, or about the length of the glumes 

 between which they extend, rupturing from apex and disclosing a distinct columella and 

 somewhat agglutinate spore-mass ; sterile cells hyaline, with those of the interior often in 

 groups, chiefly subspherical, with those forming the membrane more irregular and adhering 

 more permanently, about the size of the spores ; spores light-brown, often with pitted con- 



