388 NATURAL HISTORY BUKLET1X. 



26. PUCCINIA VILFyE 11. 110111. 



26a. On Sporobolus asper (Ms.) Kunth. ( Vilfa aspera B.) Rockport, 

 Kans., Bartholomew. 



26b. On Sporobolus asper (Mx.) Kunth. ( Vilfa aspera B.) Lafayette, 

 Ind., Lillian Snyder. 



26c. On Sporobolus asper (Mx.) Kunth. [Vilfa aspera B.) Lafayette, 

 Ind., Arthur. 



26d. On Sporobolus asper (Mx.) Kunth. {Vilfa aspera B.) Rockport, 

 Kans., Bartholomew. 



Orig. Desc. "Puccinia Sydowiana Diet. n. sp. — Sori teleutosporiferi in 

 foliis amphigeni, ellipticivel oblongi, in vaginis plus minusve lineares, 

 pulvinati, atri. Teleutosporje oblongs;, ellipticie vel clavatae, utrinque 

 rotundatre, rarius basi attenuates, medio leniter constricts, episporio 

 levi, castaneo, apice paullo, vel non incrassato instructs, 38-55 X 1S-30//, 

 pedicello usque 100// longo, firmo, flavescenti suffultje." 

 SYN : 

 Puccinia sydowiana Diet.. (1897. Hedw. 36: 299). 



II. Sori amphigenous, oblong- or linear-oblong, scattered, 

 rarely confluent, tardily naked, deep orange color when fresh; 

 spores obovate, obovate-fusiform, oblong or sub-globose, 22- 

 30x28-32//; wall colorless, usually much thickened apically 

 (up to io/<), evenly papillose; contents orange, becoming 

 colorless by long desiccation; pores obscure (seemingly equa- 

 torial). 



III. Sori amphigenous, prominent, black, early naked, 

 ruptured epidermis inconspicuous, oblong, or elongated-oblong ; 

 teleutospores mostly oblong, rarely clavate or round, slightly 

 or not constricted at the middle, apex rounded, rarely flattened 

 but often obtuse, usually more or less thickened, base rounded, 

 epispore smooth, dark brown, 18-30x38-55//; pedicel up to 

 ioo/( long, firm, tinted especially near the spore. 



A very clearly marked and easily distinguishable species, 

 quite unlike Puccinia cryptandri and P. sporobo/i, which also 

 occur on species of Sporobolus. 



Collections of this species have often been erroneously re- 

 ferred to P. sporoboli. In 1897 Dietel published a description 

 of the species under the name P. sydowiana. This name, un- 

 fortunately, was already occupied, having been used by Zopf 

 (1880. Sydow, Myc. Marchica, No. 40) for a species of rust 



