Part 1, 1906] USTILAGINACEAE 31 



5-elatinous envelope, usually rather prominently echinulate, chiefly 10-14 /^, the most elon- 

 gate rarely 17 ii, in length. 



On Polygonaceae : 



S«i^aS ^^flfJ^f''', (.Polygonum Hydropiper), ^District of Columbia, Missouri. 



lowl Missouri (^"^-^^"""'^ mcarnaium, P. lapathifolium inckmatum), Illinois, 



P^fvf"-'^ ^li"^^^''f?l-l-'^ ^.Polygonum lapathifolium) , California, Illinois. 

 ^""ourir/ebrasi'rNew Kf New ^---^^^ --). ^^^^aware, Illinois, Kansas, Mis- 



S^JIT JS^".rCa1ffor?lf "* °' '^°'""^'^^' '°"^' ^^^^""^"^ ^^- J--^' 'r--- 



? Tovara virgimana ^Polygonum virginianum) , Missouri 

 lYPE LOCALITY : Argentina, on Polygonum acre 



Distribution : New York to Texas and California ; also in South America 

 j>l. 2^^^^®'^^^^^°NS : Trans. Acad. Sci. St. I.ouis 7 : pi. 28, f. 9-12 ; Ann. Nat. Hofmus. Wien 9 : 



N i^^^.^^l( ^79^'^,^^^^^^' ^''''^' I^'il^'^^^' ^^^' Rab.-Wint. Fungi ^m.3501; BlHs & Ev. 

 TT;t^/ ^ ' "^^^'®' ^^- ^ ^^''*^- ^""^ Columb. 1940; Roum. Fungi Sel. 4416; Sydow, 



4. CINTRACTIA Cornu, Ann. Sci. Nat. VI. 15 : 279. 1883. 



Anthracoidea Bref. Unters. Gesammt. Myk. 12 : 144. 1895. 



Sori on various parts of the host, often in the ovaries, forming a black usually rather 

 firmly agglutinated spore-mass ; spores single, usually of medium or large size and of 

 reddish-black color, formed in a centripetal manner from a fertile stroma usually surround- 

 ing a central columella of plant tissues, often freed fromsorus by absorption of water ; ger- 

 mination apparently of a modified Ustilago type. 



Type, Ustilago axicola Berk. 



5ori usually dusty at maturity. (See also no. 11.) 

 Spores apparently smooth (rarely pitted). 

 Spores chiefly 8-14 i". in length. 



Spores light reddish-brown. 2. C. Taubertiana. 



Spores dark reddish -brown. 4. c. limilala 



Spores chiefly 12-19 ^. in length. 



Spores often with lateral hyaline wings. 1. C. Monlagnei. 



Spores under an immersion reticulately pitted. 3. (T. Psilocaryae. 



Spores apparently quite smooth, irregular. 5. C. Cyperi. 



Spores with coarse scales. 

 -Sori usually rather firmly agglutinated at maturity. 

 Sori in ovaries. 



Sori usually spherical or subspherical. 



Spores with evident hyaline envelopes. 8. C. externa. " 



Spores without evident hyaline envelopes. 



Spores 16-20 H-, rarely larger. 7. C. Caricis. 



Spores 20-30^ in length. 9. C.Luzulae. 



Sori chiefly ovoid, rarely subspherical. 12. C. utriculicola 



Sori surrounding peduncles (rarely in inflorescence). 



Sori without prominent false membrane, linear. 10. C.Junci. 



Sori with prominent white fungous membrane. 

 Sori subspherical. 

 Sori oblong to linear. 



6. C. subinclusa. 



11. C. axicola. 

 13. C. leucoderma 



1. Cintractia Montagnei (Tul.) Magn. Abh. Bot. Ver. Prov. 



Brand. 37: 79. 1896. 



Ustilago Montagnei Tul, Ann. Sci. Nat. III. 7 : 88. 1847. 



Sori in ovaries, usually rather completely hidden by the enveloping glumes, oblong to 

 subspherical, small, powdery or less commonly firm; spores brown or black-brown, some- 

 what compressed laterally and so showing oblong to polygonal or subcircular according to 

 view, usually with remains of enveloping membrane showing as prominent hyaline lateral 

 wings, minutely pitted, 12-19 /i, chiefly 13-16 /i, in length. 



On Cyperaceae : 



Rynchospora alba, Connecticut, Maine, New York, Vermont; Newfoundland. 



Rynchospora ciliala, Florida. 



Rynchospora eximia, Mexico. 



Rynchospora glomeraia, Connecticut, Massachusetts, Mississippi, New York. 



Rynchospora tenuis, Mexico. 



Rynchospora sp.. North Carolina, South Carolina. 

 Type locality : Algeria, Africa, on Schoenus {Rynchospora) sp. 



