244 ARTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



cm. long, from a terete stem split lengthwise bearing a few sori. 

 It is labelled " Puccinia Jwici LvS in J. effuso Beth." The telio- 

 spores are one-celled, and together with the few urediniospores 

 seem to agree with later collections on the same host, now called 

 Uromyccs Jiinci-effiisi Syd. 



*2gi4. 10. P. Windsorise, L.v.S., on leaves of Windsoria (Poa) quinque- 

 dentata, Bethlehem. 

 P. spots yellowish, at length evanescent. Sori long, linear, undulate, 

 prominent, erumpent from the epidermis, not confluent. Spores 

 compact, from purple to dark fuscous, long pedicellate. 



Represented by an original packet containing ample material, 

 consisting of parts of nine leaves, 3-10 cm. long, and four stems, 7-12 

 cm. long, well covered with telia. It is labelled " Puccinia Wind- 

 soria: LvS in culm & fol Pose quinquedent Beth." 



The rust still bears the name given to it by Schweinitz, but it 

 has been impossible to trace the origin of the name of the host. No 

 such specific name is known under Poa or Windsoria. Professor 

 A. S. Hitchcock has suggested that it was a slip intended for quin- 

 quifida, a specific name used under Poa by Pursh, but never trans- 

 ferred to Windsoria. Neither name is given in Muhlenberg's 

 " Catalogue," but he does have Poa seslerioides Michx. {P. flava 

 L.), which is clearly, the host in question, now called Tridens flavus 

 (L.) Hitchc. 



*2L,lS- II. p. Zizaniae, L.v.S., on the fallen leaves of Zizania. Kaign's Point, 

 near Philadelphia. 

 P. without spots, minute, at first covered, at length linearly erumpent, 

 the epidermis persistent about the margin of the sori; sori elon- 

 gate, abbreviate, dark, held to the light somewhat fuscous. 

 Spores loose, usually scattered about, short pedicelled, delicate, 

 not much smaller than in related species. 



Represented by an original packet containing two very small 

 shreds of much weathered leaves 1-1.5 cm. long, bearing a few telial 

 sori. It is labelled " Puccinia Zizania LvS Kaines Pt." 



The fragments remaining of this collection are so very scanty 

 that it seemed at first that no certain conclusion could be reached as 

 to the identity of either host or fungus. The slightly reddish tint, 



