248 ARTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



*2g22. i8. P. maculosa, [L.v.S., not] Straus [s]. Bethlehem, here and there 

 on leaves of Prenanthes or Hieracium. Entirely distinct from 

 the preceding by the broad, white spots, spores much paler. 



Represented only by an empty packet labelled " Puccinia macu- 

 losa LvS in fol. Hieracii." There is a specimen, however, in the 

 Michener Collection at Washington, consisting of a glabrous, pale 

 green leaf, a little more than 4 cm. long and 2 cm. wide, bearing 

 four groups of telia, labelled "2922-18 — Syn. Car. Puccinia macu- 

 losa Strau. in foliis Hieracii Beth, ex Herb. Schw." There is also 

 a similar representation in the Herb. Curtis at Harvard University 

 on " Prenanthis aut Hieracii," a small portion of which, through 

 the kindness of Dr. W. G. Farlow, the writers have been able to 

 examine. Both host and fungus, from these two sources agree per- 

 fectly with the material published as 1855, Ellis & Everhart, " North 

 American Fungi," on Cynthia virgin'ica from Illinois, 1882, A. B. 

 Seymour, and as 3413, Rabenhorst-Winter, " Fungi Europsei," on 

 Krigia virginica {Cynthia virginica) from Missouri, 1885, C. H. 

 Demetrio. A good description of the rust was given by Burrill in 

 his "Parasitic Fungi of Illinois," p. 188. It is evident that Schwei- 

 nitz was very uncertain about the name of the host as he calls it 

 Hieracium on packets, and " Prenanthes or Hieracium " in the pub- 

 lished account, and quite naturally so, if we consider it to be Krigia 

 or Cynthia virginica^ now called Adopogon znrginicus (L.) Kuntze, 

 for that plant has the aspect when growing that might well cause 

 it to be considered under either genus. Even Muhlenberg must 

 have been uncertain about it, as his catalogue either does not men- 

 tion it, or merges it with some other species, although a common 

 plant of the flora. 



Strauss gave the name Urcdo maculosa {Ann. IVett. Gcs. 2 : loi. 

 1810) to a European rust on Prenanthes purpurea, apparently in- 

 cluding both uredinia and telia, with which no rust in America has 

 been identified. The rust found by Schweinitz is a short-cycle form 

 not known in Europe. The specific name maculosa, under the genus 

 Puccinia, is, therefore, to be credited to Schweinitz. 



2923. 19. P. Helianthorum, L.v.S., Syn. Car. 495, Lk. p. 74, clearly distinct — 

 frequent on various Helianthi, and in Pennsylvania best developed 

 on dead leaves. On cultivated H. tuberosus, it occupies the lower 

 surface of almost all leaves. 



