232 VEGETABLE PAEASITES. 



XIV. Puccinia Favi. Tab. V, fig. 6. 



Division IV. Clinosporei (Leveille). 







Receptac. variabili forma, clinodio obtectum aut clinodium in 

 receptaculo inclusum. 



Tribe Coniopsidei : Receptac. carnos., coriaceum, tremel- 

 loideum pulvinat., gibbum aut linguiforme ; primitus celatum, dein 

 exoriens. Sporid. decidua, simplicia vel septata, sessilia aut pedi- 

 culata. 



Section Phragmidiei : Receptac. carnos., coriac. vel tremell. 

 Sporid. pedicellata et septata. 



Genus Puccinia : Sporidia uni-, rarius biseptata, appendiculo 

 filiformi pedicellata et matrici adnata, in tuberculum concrescentia. 



XI. Species 74 Puccinia Favi (Ardsten). 



The colour is constantly of a very distinct brownish-red, 

 whether viewed by day or candlelight, which latter usually causes 

 slightly coloured objects to appear colourless. It is of an elon- 

 gated form, at one extremity more or less longish, and occa- 

 sionally, but not very frequently, a little angular (i. e., its 

 body) ; the other contracting into a stalk. Both exhibit some- 

 times a slight contraction at the joints. The body always divides 

 into two cells, by contraction of which the one nearest the 

 stalk is the thinner. The broadest part of these cells is the one 

 nearest to the point of contraction, whence both decrease in 

 breadth. They yary to some extent in shape. The upper cell, 

 situated towards the body, is roundish and elongated, having its 

 greatest diameter either running parallel to the axis of the plant 

 or perpendicular to it; the lower, being situated nearer the 

 stalk, is longer and more angular, sometimes forming a regular 

 triangle with rounded angles. A cell-wall (= tissu cellulaire) and 

 contents (nucleus, Ardsten) are to be distinguished in both cells. 

 The contents appear sometimes homogeneous, sometimes granular, 

 sometimes spongy, full of holes or pores, which is probably caused 

 by different illumination. The cell-wall is quite homogeneous 

 and clear brighter or darker than the contents, according to the 

 amount of light. Botb cells are surrounded by a very smooth 

 membrane, which is best seen where an empty space occurs 

 between the cell-wall and the surrounding membrane, viz., at the 

 upper extremity of the plant ; sometimes also at the place of con- 



