Puccinia Compositae* 163 



I. Aecidia hypophyllous, a few rarely epiphyllous, or on petioles, seated 



on orbicular or elongated yellow or purple spots, up to 1 cm. in 

 diam., in round or irregular groups, at first hemispherical, then 

 flat, yellow or whitish, sometimes yellowish purple. 



Aecidiospores globose, subglobose or ellipsoid, delicately warted, 

 pale orange, 13-24 /t diam. 



II. Uredosori hypophyllous, on pale indeterminate irregular spots, 



scattered, minute, punctiform, pulverulent, pale brown. 



Uredospores globose or subglobose, echinulate, yellowish-brown, 

 16-24 ji diam. 



III. Teleutosori similar, girt by the ruptured epidermis, dark-brown. 



Teleutospores ellipsoid, rounded but not thickened at apex, 

 mostly rounded at base, not constricted at septum, delicately 

 warted, brown, 26-36 X 16-24 p ; pedicels hyaline, very short. 

 On living leaves of Lactuca. 



Victoria, New South Wales, S. Australia. 



No specimen seen. It is given on the authority of Cooke, but Mueller 3 

 only records the aecidial stage for Victoria. The aecidial wall is very im- 

 perfectly formed in this species, and there is a close approach to caeoma 

 forms. 



Senecio. 

 92. Puccinia tasmanica Diet. 



Dietel, Ann. Myc. I., p. 535 (1903). 

 Sydow, Mon. Ured. L, p. 867 (1904). 

 Sacc. Syll. XVIL, p. 277 (1905). 



I. Aecidia on blister-like swellings on stem and branches, on upper and 

 under surface of leaves, on flower-head stalks and involucre, causing 

 discoloration and distortion, and usually surrounded by paler green 

 tissue, about J mm. in diam., disposed in large circular or oval 

 clusters or irregularly ; pseudoperidia cup shaped, with white, 

 irregularly laciniated everted edges, tubercular before opening ; 

 peridial cells firmly united, overlapping each other, with striated 

 margins and usually broader at one end, individually slipper- 

 shaped, 25-35 x 13-17 p. 



Aecidiospores spherical or angular, orange colored, very delicately 

 warted, 13-16 /z diam., or 14-17 x 11-15 /*. 



III. Teleutosori for a long time covered by epidermis, then erumpent 

 and epidermis usually thrown off or remaining in shreds and 

 patches, intermixed or running parallel with aecidia, black, pulvi- 

 nate, oval, up to 1 mm. long, often confluent in elongated lines. 



Teleutospores oblong to clavate, chestnut-brown, slightly con- 

 stricted at septum, smooth, 36-63 X 15-25 ju, average 54 x 20 ^/, 

 occasionally tricellular when 48-73 p long; upper cell deep chest- 

 nut-brown, rounded or somewhat oval, conoid, or truncate and 

 thickened at apex (up to 13 fj,) lower cell usually paler in colour, 

 rounded at base or tapering, often elongated relatively to upper ; 

 pedicels persistent, pale yellow to hyaline, sometimes longer than 

 spore. 



X. Mesospores very common, elongated oval, oblong, or somewhat 

 elliptical, apex rounded or pointed and usually thickened, golden- 

 yellow to chestnut-brown, 29-44 x 13-17 yu. 



