Puccinia Apocynaceae. 143 



The teleutospores are frequently 3-4 celled, and there is great variety in 

 the arrangement of the septa. The spore may be divided vertically as in 

 Diorchidium, or it may have a vertical or oblique septum in its upper or 

 lower cell. . The septa may even be arranged muriformly. There may be 

 a lateral hyaline apiculus in the lower as well as in the upper cell, and the 

 pedicel may stand out at right angles to the lower cell. 



There is thus every gradation from the unicellular spore and the bicell- 

 ular, in which the upper cell is more or less atrophied, up to the multicellular, 

 which is vertically, obliquely or muriformly divided. 



Aecidia have been found on this plant and are regarded as belonging to 

 this species, but although numerous specimens have been examined from 

 various localities no trace of aecidiospores has been found here. 



It is worthy of note that some of our native species of Viola closely 

 resemble the Dichondra, and the one may easily be mistaken for the other 

 when no flowers are present. 



(Plate V., Fig. 42 ; Plate XL., Fig. 299.) 



APOCYNACEAE. 



Alyxia* 



67. Puccinia alyxiae Cooke and Mass. 



Cooke and Massee, Grev. XVI., p. 2 (1887). 

 Cooke, Handb. Austr. Fung., p. 338 (1892). 

 Sydow, Mon. Ured. L, p. 336 (1902). 

 Sacc. Syll. VIL, p. 714 (1888). 



III. Teleutosori generally hypophyllous, occasionally epiphyllous, 

 discoid, compact, dark-brown, girt by the ruptured epidermis, 

 l-2mm. diam. 



Teleutospores almost pear-shaped or oblong, yellowish to 

 brownish, constricted in the middle, thickened at apex and 

 generally apiculate, sometimes rounded or truncate, occasionally 

 3-celled, 40-52 x 20-25 p, average 45 x 20 p. ; epispore thick, 

 smooth, coloured ; pedicels persistent, hyaline, broadish, elongated, 

 up to 130 //, occasionally at right angles to the spore. 



X. Mesospores not uncommon, similarly coloured, elongated oblong, 

 thickened and sometimes apiculate at apex, 38-50 X 19-21 p. 



On leaves of Alyxia buxifolia B. Br. 



Victoria Brighton and Broadford, Sept., 1887 (Miss Campbell 1 ). 

 Beaumaris, March, 1895. Cheltenham, May, 1902 (C.French, 

 jun.) Sandringham, April, 1905. (Bobinson). 



South Australia Gawler, Sept., 1893. (Tepper). 



Tasmania Near George's Bay, Nov., 1892. (Bodway '). 



The sori are generally isolated, much inflated and surrounded by a 

 conspicuous, brown, elevated ridge. When on both surfaces they are 

 opposite to each other. 



In the Cheltenham material, the spores had germinated on the leaves 

 lying on the ground on 19th May, while the spores on the Gawler material 

 found in September had not. 



This spore probably undergoes a period of rest during the summer 

 before germination. Cooke and Massee have given the length of the spores 

 as 50-70 p, but this is evidently a misprint. 



(Plate VI., Fig. 46.) 



