Australian Fungi. 217 



spores reddish-brown, stalked, elliptic, upper and lower cell 

 about same size ; upper cell rounded and not thickened at apex, 

 hemispherical ; lower cell somewhat similar, but often tapering 

 towards base, average 38 x 22yu., pedicel transparent, deciduous. 



On leaves and flowering stems of Hypodueris radicata. All 

 the year round when moisture is present, but especially common 

 about April and May, and September to November. Ardmona, 

 in Goulburn Valley, Victoria (Robinson, ^^^.^ 96). 



The presence of the fungus seems to check flowering, or at 

 least, to retard development greatly, for healthy plants are met 

 with flowering fi'eely, while diseased specimens are conspicuous by 

 the absence of flowers. The leaves begin by assuming a pale gi*een 

 ro yellowish tint, then turn snuff'-brown and shrivelled. This 

 form approaches P. cauliiicola, Corda, found by Cooke on 

 Hypochceris glabra from Queensland, and which he considers 

 may possibly be a form of P. Hieracii. 



(6) Piicciiiia Hypochaeris, McAlp., n. sp. 



^cidiospores and Teleutospores occurring together on both 

 surfaces of leaf. 



^Pcidiospores. — Pseudoperidia amphigenous, on greenish-yellow 

 to brownish orbicular patches, clustered, orange-yellow, round to 

 elliptical. Aecidiospores subrotund to oval, pale orange-yellow, 

 14 - 16/x X 12-5/x. 



Teleutospores. — Sori intermixed with jecidia, black, elliptical, 

 sometimes run together, girt by ruptured epidermis, sometimes 

 exactly opposite each other on upper and under surface of leaf. 

 Teleutospores chestnut-brown, pedicellate, constricted at middle ; 

 upper cell dark bi-own, rounded or scoop-shaped, thickened at 

 apex ; lower cell pale brown, usually tapering towards base ; 

 47 - 50|a X 19 - 23/>i.. Pedicels hyaline, sometimes persistent, 

 about length of one of the cells, viz., 24/x. 



On leaves of Hypochceris radicata. October. Ardmona, in 

 Goulburn Valley, Victoria (Robinson, 117). 



This species belongs to the group Piicciniopsis, Schroet., in which 

 only ^cidiospores and Teleutospores are known, occurring on 

 the same host plant. 



