OP ARTS AND SCIExNCES. 75 



No. 1003. It may be doubted whether either the form oa Ra- 

 nunculus abortivus or that on Anemone nemorosa is the same as the 

 u^c. Raiiunculacearum DC, or the form associated witii Uromyces 

 Dactylidis. The fungus on R. abortivus is the u^c. Ranunculi of 

 Schvveiuitz's Syn. Car. no. 410, afterwards referred to ^c. Ranuncu- 

 laceatum Lk. in the Syn. Am. Bor. The form on Anemone has the 

 jecidia in spots, as iu -^c. Ranunculaceurum DC, but the small size 

 of the ajcidia, as well as other peculiarities, leads one to ask whether it 

 is not distinct from all the forms on Ranunculus. 



No. 1004. ^cidlum Thalictri Grev. Mr. Ellis informs me that 

 by accident the wrong specimens were distributed with this number, 

 and that the true species will be distributed later. 



No. 1007. I can see no good ground for separating this from 

 ^cidium Violce Schm. Authentic European specimens of that spe- 

 cies have spores as large as this. ^c. Petersii B. & C, which also 

 occurs on violets, has slenderer and longer peridia. 



No. 1018. The three forms on Rudbeckia, Xanthium, and Solidago 

 may, for want of any satisfactory information as to their relationship, 

 be called ^c, Compositarum ; but it is perhaps going too far to give 

 Martius as the authority. The form on Xanthium is in Massachusetts 

 frequently followed by the Puccinia Xanthii of Schweinitz, distributed 

 as no. 264. 



Nos. 1021-1026. In another paper I shall refer to the distribution 

 of the Peridermia of the White Mountain region, and the names and 

 authorities here given are taken from Thiimen's Blasenrost Pilze der 

 Goniferen without criticism. The P. orientale, no. 1026, apparently 

 common in the Southern States, is rosy flesh-colored when fresh, and 

 is probably what is figured by Bosc in Gesell. Naturf. Freunde, Vol. 

 V. PI. G, f. 13, as Tubercularia cornea. 



No. 1084. The spermogouia of this species usually appear on the 

 leaves, while the a3cidia are more common on the fruit and smaller 

 twigs. 



No. 1086. The typical form of Roestelia penicillata Fr. is well 

 shown in the specimens on the fruit of Amelanchier. 



No. 1087. Apparently R. Botryapites Schw. occurs in its most 

 luxuriant form on AmelancJner, growing near the seashore, as shown 

 in the specimen from Magnolia, Mass. 



No. 1089. This is the typical R. cornuta Tul., and is abundant at 

 Eastport, Me., where it is associated with Juniperus communis, which 

 on the coast of Maine is infested by Gymnosporangium clavariceforme 

 DC. no. 273. It is supposed, however, in Europe, that R. cornuta is 



