Melampsora Hypericaceae. i 9I 



Considering its occurrence on indigenous Leguminous plants, together 

 with the narrower teleutospores and colourless promycelial spores, as com- 

 pared with C. asdepiadeum, I considered it a new species and had named it 

 C. leguminum. But I find that Hennings in a footnote in Hedwigia XL., 

 p. 127, states that the form occurring on Jacksonia is specifically distinct 

 from C. asclepiadeum, and had better be named C. jacksoniae, the name now 

 adopted. 



(Plates XXXVII., XXXVIII.) 



MELAMPSORA Castagne. 



In this genus there are both heteroecious and autoecious species, but only 

 the latter occur in Australia. The two species known are on native plants, 

 but they also occur in Britain on the same genera. They only possess uredo 

 and teleutospores, but the three spore-forms may occur on the same host 

 (M. amygdcdinae Kleb.), or only aecidia and teleutospores (M. saxi- 

 fragarum (DC.) Schroet.). 



The teleutospores form flat irregular crusts, and are united to each other 

 like the cells of a honeycomb. 



Rostrup first pointed out in 1883 the connection between this genus and 

 Caeoma species, and now the relation between a number has been proved by 

 cultures. 



General description. Spermogonia forming a minute, hemispherical, 

 flattened stratum, often subcuticular, otherwise subepidermaL 



Aecidia after the eaeoma type, destitute of a pseudoperidium, usually 

 without paraphyses, pustular. 



Uredospores usually without distinct germ-pores, included in more or less 

 developed peridia. 



Teleutospores unicellular, rarely transversely divided, coalescing in a 

 plane, firm, black or dark-brown stratum. Sporidiola globose, yellow, then 

 orange. 



Australian species, 2. 



HYPERICACEAE. 



Hypericum. 



127. Melampsora hypericorum (DC.) Schroet. 



Schroeter, Brand und Rost., p. 26 (1872). 

 Sacc. Syll. VII., p. 591 (1888). 



II. Uredosori mostly hypophyllous, scattered or subgregarious, at first 



bright orange, becoming pale, pulverulent, small, up to J mm. 

 diam, erumpent and surrounded by the ruptured epidermis. 



Uredospores subglobose to ellipsoid, finely verrucose, orange 

 yellow, with two germ-pores on one face, 14-21 x 11-17 ^, 

 average 17 X 1 4 p ; paraphyses intermixed, numerous, hyaline, 

 capitate, over-topping the spores, 50-68 p long, with head 18-24 p. 



III. Teleutosori minute, dark-brown, flat, irregular, solitary or gre- 

 garious. 



Teleutospores yellowish-brown, intercellular, subcylindrical or 

 prismatic, 25-37 + 6-9 p. 

 On leaves and occasionally on stems of Hypericum japonicum Thunb. 



Victoria Murramurrangbong Ranges, Nov. and Dec., 1902-3, and 

 Mt. Blackwood, Jan., 1903 (Robinson). Buffalo Mts. and 

 Alps, near Bright, Nov. and Dec., 1903-4 (C. French, jr.). 

 Near Melbourne, Nov., Jan. 



