216 ARTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



Frequent on the leaves of Ipomoea (Convolv.) pandurana. Per- 

 idia thick, the loose epidermis larger than in almost any ^cidia, ex- 

 cept cornutum and cancellatum. Spores rather small, oblong.) 



Represented by a mounted stem, 7 cm. long, and part of two 

 leaves, and by an original packet, containing ample material, and 

 labelled inside " yEcidium Ipomsese in pandurata & lacunosa Salem," 

 and on the outside " iEcidium Convulvuliat LvS. Salem & Beth in 

 Conv. pandurat." 



The fungus is certainly and wholly Albugo Ipomcece-pandurance 

 (Schw.) Swingle one of the Peronosporales, and not a rust. The 

 name was changed to ^cidium (Cceoma) convolvulatum at page 309 

 of the later work. 



2867. 57. C. Ai Compositarum, Lk. n. 139, and frequent in Pennsylvania. 

 a Prenanthis on Krigia, Salem, Syn. Car. 434. 

 iS Eupatorise, Bethlehem, frequent on E. purpureum. 

 (434. 5. [^cidium] Dandelionis Sz. 



Why not merely a variety of yEcidium prenanthis, to which 

 it is very similar? Spores subglobose, without septum and ped- 

 icel, chestnut-brown. On leaves and stems of Tragopogon Dan- 

 delion. Rare.) 



Represented by an original packet, containing a few very small 

 fragments of a leaf with many secia, and labelled inside "^cidium 

 Eupatorise maculatse Bethl," and on the outside "^cidium Eupa- 

 toriatum LvS Beth," with " compositatum " written above. There 

 is no packet for the other entry, and no mounted material for either, 

 although there is indication that there may once have been a mount 

 where pin marks now show. 



The ascia on Eupatorimn are doubtless to be assigned to the 

 widespread rust, Pucc'mia Eleocharidis Arth., very common both 

 north and south, the uredinia and telia being on various species of 

 Eleocharis, and the aecia on various species of Eiipatorium, includ- 

 ing both E. maculatimi L. and E. purpureum L. As the fragment 

 in the original packet shows the leaf to be smooth above wnth minute 

 sparse pubescence beneath and not at all scabrous, the host is doubt- 

 less E. purpureum and not E. macuJatum , the conclusion evidently 

 reached by Schweinitz. 



The identity of the form on Krigia is somewhat uncertain. The 



