PAPERS GIVING RUSTS OF NORTH AMERICA. 'J59 



often confluent, at first covered l>y the epidermis, soon ruptured. 

 Spores brown fuscous, loosely attached and Uredo-like but 

 nevertheless a true Puccinia. 



Represented by a packet coiilaining two large leaflets, 8 by 15 

 cm., bearing several loose groups of telia, and labelled " Puccinia 

 Art triphylli Mauch Chunk." 



This number is now called Uromyccs Caladii (Schw.) Farl., and 

 on Arisccma triphyllum (L.) Schott {Arum triphyllum L.), other 

 stages of the life cycle being listed under nos. 2839, 2860 and 1861. 



Genus 213. Piiragmidium. 



It is worthy of note that I have never met with a Phragmidium in America 

 on the leaves of Rosa or Rubus, but the following very 

 common species without doubt belongs here. 



2947. I. P. Hedysari, L.v.S., Syn. Car. 503, frequently occurs on leaves 

 of H. paniculatum and others, Bethlehem and Salem. 

 P. sori minute but thickly scattered over the whole leaf, resting upon 

 the epidermis. Spores long pedicelled, pedicel articulate, 

 pellucid, remainder opaque, ovate, obtuse, not cylindric, ob- 

 scurely septate, not constricted at the articulations, fuscous 

 black. 

 (503. 18. [Puccinia] Hedysari paniculati Sz. 



P. punctiform, sparse, fuscous, spores ovate-globose, fus- 

 cous, pedicel very long, filiform, pellucid. 



Frequent on the under face of the leaves of Hedysarum 

 paniculatum. I see no septum in the spore. Pedicel filiform, 

 pellucid.) 



Represented only by an empty packet, labelled on the inside 

 " Dicseoma Hedysari paniculat Salem," and on the outside " Puc- 

 cinia Hedysari panic Salem." 



If the genus Uromyccs had been in use at the time, Schweinitz 

 undoubtedly would have placed this species under it. certainly at 

 first, for he says he could see no septum. What his idea of the 

 genus Phragmidium was, it is now difficult to say, but the senior 

 author has explained in the paper referred to under no. 2940, that 

 when the tcliospores are seen dry under low magnification "the 

 pedicels being delicate cylinders collapse and twist like a ribbon, and 

 what appear to be three or four joints in each pedicel are very dis- 



