Part 1, 1906] USTILAGINACEAE) 23 



67. Ustilago Rumicis (Berk.) Clinton, Proc. Bost. Soc. 



Nat. Hist. 31 : 380. 1904. 



Ustilago uiriculosa Rumicis Berk. Grevillea 3 : 59. 1874. 



F 



Son in flowers of the inflorescence and involving the floral axes as well, forming pur- 

 plish dusty spore-masses ; spores medium- to rather dark-purple, chiefly ovoid to spherical, 

 with more or less prominently winged reticulations (chiefly 1 fx deep by 1-3 fi wide), mostly 

 11-16 /i in length. 



On Polygonaceae : 



Rumex Acetosella, South Carolina. 



Rumex hastatulus, Alabama. 

 Type locality : Santee Canal, South Carolina, on Rumex Acetosella. 

 Distribution : South Carolina and Alabama. 



68. Ustilago Parlatorei Fisch. de Waldh. Hedwigia 15 : 177. 1876. 



Sori in stems, petioles and midribs, often extensive and causing more or less distortion 

 and swelling of infected parts, upon rupture of enclosing tissues disclosing dark-violet 

 dusty spore-mass ; spores violet, often with reddish tinge, ovoid to chiefly subspherical or 

 spherical though rarely more irregular or elongate, with numerous rather regular reticu- 

 lations (about 2 /i wide and 1-2 // deep), chiefly 12-16 //in length. 



On Polygonaceae: 



Rumex altissim^us, Illinois. 



Rumex Briiannica, Missouri, Nebraska. 



Rumex mexicanuSj Mexico. 

 Type locality : Near Moscow, Russia, on Rumex m-aHtimus. 



Distribution : Illinois, Missouri, Nebraska, and Mexico ; also in South America and Europe. 

 KxsiCCATi : Ellis & Kv. N. Am. Fungi 2701; Rab.-Wint.-Paz. Fungi Eur. 4009; Sydow, Ust. 



112, 



69. Ustilago Koenigiae Rostr. Medd. Grenland 3 : 532. 1888. 



Sori on stems and sometimes on leaves, forming subspherical to linear pustules, upon 

 rupture disclosing somewhat dusty purplish spore-mass ; spores very light-violet, irregular, 

 oblong to spherical, apparently smooth but under an immersion lens showing very minute 

 oblique striae, chiefly 6-9 /i, the most elongate rarely 12 /i, in length. 



On Polygonaceae : 



Macounastrum islandicum. {Koenigia islandica)^ Greenland. 

 Type locality : Greenland, on Koenigia islandica {Macounastrum. islandicum.). 

 Distribution : Known only from the type locality. 



70. Ustilago Piperii Clinton, Proc. Bost. Soc. Nat. Hist. 31: 382. 1904. 



Sori forming pustules on under side of leaves, several mm. in diameter though usually 

 more or less completely confluent, often confined to the margin, upon rupture of thin 

 covering membrane showing dusty dark-purple spore-mass; spores reddish-purple, ovate or 

 ovoid to chiefly subspherical or spherical, occasionally more irregular, minutely and usually 

 obliquely striate, chiefly 7-10 /«, or irregular ones occasionally 12//, in length. 



On Polygonaceae : 



Polygonum. Davisiae, California. 



Polygonum phytolaccaefolium, Idaho. 

 Type locality : Bald Mountain, Bitter Root Mountains, Shoshone County, Idaho, on Poly- 

 gonum phy tolaccaefolium. . 



Distribution : Idaho and California. 



71. Ustilago punctata Clinton, sp. no v. 



Sori in the inflorescence more or less involving the whole or confined to the individual 

 flowers and enwrapped by the floral envelopes, rarely developing pustules on the floral 

 leaves, forming a black-purple dusty spore-mass ; spores dark-purple (immature ones often 

 hyaline or tinted), rather irregular, often adhering together somewhat, ovoid to subspherical 

 or not infrequently flattened and irregularly elongate, appearing smooth but under high 

 powers or an immersion lens usually showing very minutely punctate-reticulate, chiefly 

 13-17 /i, the most elongate rarely 19 ,", in length. 



