228 ARTHUR-BISBY— TRANSLATION OF SCHWEINITZ'S 



This specimen has large secia, and spores that correspond to the 

 aeciospores of Puccinia Viola (Schum.) DC. 



The other mounted specimen consists of one reniform leaf, 3 cm. 

 broad, bearing three groups of secia ; and there is a corresponding 

 empty packet labelled "^cidium Violatum V. obliqua Beth." 



This specimen shows smaller secia, and much smaller aeciospores 

 than the other, and is doubtless the secial stage of Uromyces pedata- 

 tiis (Schw.) Sheldon. The host is in all probability Viola primulce- 

 folia L. 



*2885. 75. C. A. pedatum, L.v.S., in some j^ears very common on leaves and 

 petioles of Viola pedata, Bethlehem. 

 C. spots very small, much elevated and proportionally thick, purplish, 

 almost everywhere covered with rather large, somewhat high, 

 subcylindric pseudoperidia. Spores pale. 



Represented by six leaves and one flower, mounted loose in a 

 packet, showing many secia, and an original packet, containing two 

 very small leaves bearing a few small, irregular groups of secia, which 

 is labelled " .^cid Viol, pedatce Lv Bethl." 



The secia and spores of this specimen, which are clearly on Viola 

 pedata L., agree with those which were shown by cultures in 1910 

 to be the secial stage of Uromyces pedatatus (Schw.) Sheldon ([/. 

 Andropogonis Tracy), having telia on species of Andropogon. The 

 name was changed to ^cidium (Cceoma) pedatatum on page 309 of 

 the same work. 



*2886. 76. C. A. sagittatum, L.v.S., on leaves of Viola sagittata, Bethlehem 

 Scarcely the same. 

 C. spots purple, but j-ellowish on the lower surface. Pseudoperidia 

 slightly elevated, sparse, without order, on bullate spots, pale. 

 Spores concolorous. 



Represented by a short caudex with five attached leaf stalks 

 and three leaf blades, two of full size, 3 cm. long, one blade and one 

 petiole bearing indefinite groups of secia, and by an empty packet 

 labelled " ^cid. Violce sagittal LvS Bethl." 



The necessity of discriminating microscopic fungi chiefly by their 

 gross appearance and the effect produced upon the host led Schwei- 



