Puccinia Compositae. 151 



Calendula. 



76. Puccinia calendulae Me Alp. 



McAlpine, Proc. Linn. Soc. N.S.W. XXVIII., p. 558 (1903). 

 Sydow, Mon. Ured. I., p. 852 (1904). 

 Sacc. Syll. XVII., p. 280 (1905). 



Aecidium calendulae Me Alp. Agr. Gaz. N.S.W. VII., 

 p. 152 (1896). 



I. Aecidia araphigenous or on stems, orange-yellow, in clusters up to 

 6 mm. diam, sometimes circinate, or may be scattered irregularly ; 

 pseudoperidia with white, torn and reflexed margin ; peridial cells 

 quadrate or polygonal, striated at margin, 21-24 p, long. 



Aecidiospores very irregular, sub- globose to polygonal, very finely 

 echinulate, pale orange, 14-17 X 11-12 jj. or 12- 16 p diam. 



III. Teleutosori intermixed with aecidia, black, erumpent, soon naked, 

 girt by the ruptured epidermis, circular to elliptical, minute, 

 compact, often confluent. 



Teleutospores yellowish-brown, clavate to oblong clavate, con- 

 stricted at septum, rounded or acute at apex and thickened (up to 

 12 p), attenuated towards base, smooth, 36-52 x 19-23 //, 

 average 48 x 20 p ; upper cell darker in colour and broader than 

 lower, 21-31 /x long; lower cell slightly or not at all tapering 

 towards pedicel and averaging same length as upper ; pedicel 

 persistent, hyaline, but coloured towards apex, 28-37 X 7-8 yi/, 

 but may attain a breadth of 10 ju at junction with spore. 

 X. Mesospores not uncommon, similarly coloured to teleutospores, 

 ovate to elliptical or pear-shaped, thickened at apex, 30-42 x 

 21-23 p. 



On leaves and all green parts, including fruits of Calendula officinalis L. 

 Victoria Near Melbourne, growing in gardens, 1892, <fcc. Killara, 

 July-Oct., 1902. Geelong, Nov., 1904, I., III. (Pescot-t). 

 Frankston, August, 1904, I. 



Aecidial stage all the year round, but less common in mid-summer, 

 persisting only in shady gardens. Teleutostage from March to November. 



The aecidial stage was the only one found at first, and was described in 

 the Agricultural Gazette of New South Wales for 1896 at p. 152. Then 

 in March, 1902, the teleutostage was found by Mr. G. H. Robinson, and 

 was very plentiful. Both stages very common in University Gardens, 

 Melbourne, in autumn and winter of 1905. Mesospores germinating at apex 

 like teleutospores, and producing sporidiola. 



It causes swelling, discoloration and distortion of the flower-stems and 

 leaves, and the bright orange colour of the aecidia on the leaves at once 

 attracts attention from its harmonising with the flower-head. 



(Plates VIII., Fig. 65 ; XLIIL, Fig. 312 ; Plate E., Figs. 22, 23.) 



Calocephahi*. 



77. Puccinia calocephali Me Alp. 



I. Aecidia very sparse on upper surface of hairy leaves, about J mm. 

 diam. ; pseudoperidia saucer-shaped, laciniate at margin ; peridial 

 cells, oblong to lozenge-shaped, striated, 25-32 /u long. 

 438. F 



