PAPERS GIVING RUSTS OF NORTH AMERICA. 235 



rather pale. Pseudoperidia large, dense, elevated, orange or 

 pale, margin fuscous. Spores orange-fuscous, becoming de- 

 colored. All much smaller on the leaves — pseudoperidia 

 densely aggregated.- 

 (441. 12. [^cidium] Sambuci Sz. 



A. maculiform, large, thick, contorting the leaves, orange, 

 becoming white, peridia minute, and spores simple, pale. 



Chiefly on the larger veins on the leaves, and on the petioles 

 of Sambucus Canadensis. It distorts the leaves. Color orange- 

 saffron ; peridia sparse, spore-mass pale yellowish white.) 



Represented by parts of two compound leaves and bits of hyper- 

 trophied rachis, mounted loose in a packet, showing numerous small 

 groups of jecia, together with an original packet containing frag- 

 ments of two leaves, also bearing small groups of aecia, labelled on 

 the inside " .^cidium Sambuci In Samb canad. Sal & Bethl," and on 

 the outside "^^cidium Sauihnciatiim LvS Bethl." 



This is the aecial condition of Puccinia Sambuci (Sclnv.) Arth. 

 {P. Bollcyana Sacc), a common rust in the eastern United States, 

 having telia on Carcx. The asterisk before this number is a typo- 

 graphical error. The name Aicidhim (Ccronia) sambuciatum is 

 given on page 309 of the same work. 



2898. 88. C. A. Urticatum, Lk. n. 169, Syn. Car. 436, very rare on Urtica. 

 Salem, also at the same place on Cynoglossum amplexicaule. 

 (436. 7. [^^Icidium] Asperifolii. Rather rare on Cynoglossum 

 amplexicaule.) 



Represented by neither a specimen nor an original packet at 

 Philadelphia or in the Michener collection at Washington, or in the 

 Herb. Curtis at Harvard University. Cynoglossum virginicum L. 

 (C. amplexicaule Michx.) is not known to bear a rust. Neither is 

 any rust known on Urtica so far south as North Carolina, although 

 secia are common north of the 39th parallel of latitude. 



The association of Urtica and Cynoglossum probably is carried 

 over from European observations as given in the work by Albertini 

 & Schweinitz (1. c, p. 117). It is probable that some appearance 

 of the leaves misled Schweinitz into thinking that he had found in 

 America the same rusts he had observed in Saxony. 



