Uromyces Zygophyllaceae. 103 



Uredospores golden brown, finely echinulate, ellipsoid to ovoid or 

 oblong, 3-4 scattered germ-pores on one face, epispore 3 u thick 

 25-32 x 17-21 /*. 



On Sderanthus diander R. Br. 



Victoria June, 1898 (Reader). 



Only the uredo-stage was found although numerous sori were examined 

 and while the uredospores generally agree with those of the above species 

 they are sometimes a little longer. 



It was originally found in Denmark on the stems and calyces as well as 

 the leaves of Sderanthus perennis L. 



The description is as follows : " Sori scattered, minute, orbicular or 

 oblong, pale brown, long covered by epidermis. Uredospores yellowish- 

 brown, globose, echinulate, 15-22 ^ diam. or oblong, 24-25 X 18-20 p. 



Teleutospores rare, intermixed with uredospores, pear-shaped or obliquely 

 ellipsoid, reddish-brown, apical papilla transversly thickened, 23-24 x 

 19-24 p. ; pedicel hyaline, deciduous." 



(Plate XXVIII., Fig. 248.) 



ZYGOPHYLLACEAE. 



Zygophyllum. 



26. Uromyces vesiculosus Wint. 



Winter, Hedw. p. 22 (1885). 



Cooke, Handb. Austr. Fung., p. 330 (1892). 



Sacc. Syll. VII., p. 547 (1888). 



Sori amphigenous, scattered or gregarious, often confluent, rounded 

 or irregular, ruddy brown, covered by the cinereous vesicular 

 epidermis, which ultimately ruptures and surrounds the sorus. 



II. Uredospores sub-globose, elliptic or ovate, yellow to brownish, 



densely warted, even prickly, epispore thin, with 3-5 equatorial 

 germ-pores on one face, 26-35 x 19-24 //, average 28 x 20 p. 



III. Teleutospores globose, elliptic, ovate or pear-shaped, thickened at 

 the apex, rounded or with a broad apiculus more or less shortly 

 conical, 21 /z diam., or 23-31 x 17-22 /z, average 25 X 20 p 

 epispore thick, smooth, dark bay brown when mature; pedicel 

 long, thick, persistent, may be flexuous, pale olivaceous, up to 

 150 p. 



On living leaves and stems of Zygophyllum billardieri DC. 

 S. Australia Spencer's Gulf (Tepper). (Winter ] ). 

 On leaves, stems, and fruit capsules of Z. glaucescens F.v.M. 



Victoria Near Dirnboola, November, 1894, and Warracknabeal, 



March, 1904 (Reader). 

 S. Australia Yorke's Peninsula, June, 1902 (Molineux). 



The confluent sori may form large conspicuous elongated patches up to 

 10 mm. long or more, and the greyish bladder-like epidermis remains 

 unbroken for some time. Several two-celled teleutospores were met with 

 and not constricted at the septum, which was decidedly thick and rather 

 below the middle, sometimes approaching the base. They were, in other 

 respects similar to the ordinary teleutospores, even to the size, and 

 measured about 27 x 22 u. 



