258 



1249. Ustilago tritici (Persoon) Jensen, Syll. IX'", Syn: Uredo 

 tritici Pers. Syn. "\ Hvedens Stevbrand (Jensen 88 c). Lit: R 90 b '^ 

 90 e ''°, 92 f c. icon., 02 a "\ M. L. M. 09'°' 6. June 1911. 



June— July. Triticum sativum. F. Hundrup (Jak. Lge), Skaarup O'/s 62); S. 

 0resundsh0j ("Molds hvide Hvede"), Lyngby (M. L. M.), Kebenhavn, Ros- 

 kilde (Thomsen), Tystofte (A. Christensen) ; Falst. Stubbekabing ("Red pro- 

 lific"), also recorded in the sorts "Criewener and "Wilhelmina". 



1250. Ustilago nuda Rostrup 89 j ^''^ Syn: Ust. nuda (Jensen) 

 Kellerm. &^ Swingle 90, Syll. IX°'', Ust. segetum var hordei f. nuda 

 Jensen 88 a '\ Uredo segetum Pers. Fl. D. tab. 2150, Ust. hordei Bre- 

 feld non Persoon, R 90 b ^°, 02 a"* etc., Negen Bygbrand (Jensen 

 88 c), Lit: R 7P', 75 '', 80 c, 89 j '"=, 90 e '", J. P. Jacobsen 79 etc. 



July— August, very common; every spikelet of the smutted head is not 

 always affected; adjacent leaves are occasionally smutted; noticed on many 

 cultivated forms of Hordeum sativum: distichon, hexastichon, zeocriton, trifur- 

 catum etc. 



1251. Ustilago hordei (Pers.) Kellerm. &. Swingle, Syll. IX ='', 

 Syn: Uredo hordei Pers. Syn. ^^\ Ust. tecta R 89 j '''^ Ust. Jensenii 

 Rostrup 90 b ^^ 90 e '"', Ust. segetum var hordei tecta Jensen 88 a, 

 Daekket Bygbrand Jensen 88 c, R 02 a "^ c. icon. Lit: Wille 93 c. icon., 

 R 92 f c. icon., Magnus 05. 



F. Kalpin Ravn examined Persoon's herbarium in Leyden and sta- 

 ted that Uredo hordei Pers. is really this species (see M. L. M. 08 '''"). 

 Rostrup thinks that the attacks of this species on Hordeum cause the 

 heads to be ramified (R 85 a). 



June— August, common on Hordeum sativum distichon, hexastichon, hiber- 

 num etc. 



1252. Ustilago avenae (Persoon) Jensen, Syll. IX ^'', Syn: Uredo 

 avenae Pers. Syn. ''", Uredo segetum Pers., Schum. no 1577 part., 

 Negen Havrebrand R 02 a '^^ c. icon. Lit: R 90 b '' c. fig., 90 e ''^ 

 Wille 93 c. icon. 



July— September, common on Avena sativa, orientalis, fatua, fatua X sativa. 



1253. Ustilago Kolleri Wille 93, R 02 a ^^^ c. icon., Syn: Ust. ave- 

 nae var laevis Kellerm. &. Swingle 90, Syll. IX =»', Ust. levis (K. 6. S.) 

 Magnus 95, Daekket Havrebrand (R 02 "^ c. icon.). 



July— September, on Avena sativa, orientalis, strigos^, strigosa X patula not 

 uncommon. ,' 



1254. Ustilago perennans Rostrup 90 b ^^ Syll. IX='', Syn: Ery- 

 sibe vera & Holci avenacei Wallr. Fl. crypt. Germ. II '^", Draphavre- 

 brand (R 90 e"'). 



Mycelio in rhizomate nutricis perennante, sporis globosis, levibus 



