88 Uromyces Orcliidaceae. 



\\. Uredosori on pale green patches, brick coloured to orange, 

 amphigenous, but more common on under surface of leaves, 

 elongated oval to elliptical, bullate, solitary or in groups, not 

 confluent, at first papillate, then bursting through and surrounded 

 by ruptured epidermis. 



Uredospores orange, subspherical to elliptic or ovate, finely 

 echinulate, relatively thick-walled, with two to three germ-pores 

 on one face, average 20-23 p diam. or 22-25 x 19-20 p. 



III. Teleutosori blackish on ruddy brown spots, elongated and 

 confluent, sometimes completely enveloping stem, at first bullate, 

 finally with greyish epidermis around or over them in shreds and 

 patches, generally 2 mm. long, sometimes up to 3 mm. 



Teleutospores variable in form, oval, ovate, or somewhat 

 globular, yellowish - brown to chestnut - brown, smooth, apex 

 thickened (up to 8 p), round or conical, 25-32 x 20-29 p, average 

 30 x 25 p ; pedicels persistent, pale yellow, especially towards 

 spore, up to 80 p long and 9 p broad. 

 On leaves and stems of Tricoryne elatior R. Br. 



Victoria Near Melbourne, Oct., 1892, II., III. (Robinson). 

 Rutherglen, July, Oct., 1893, 1., II., III. Murramurrangbong 

 Ranges, Nov. 1902 (Robinson). Nagambie, Nov., 1904, II., III. 

 New South Wales Richmond, Oct. (Musson). 



I. on both surfaces of leaves, July. II., on stems and leaves, not very 

 common in July, but prevalent in October and November. III. on stems 

 and branches and both surfaces of faded leaves, very common in July, 

 forming dark swollen patches. 



Several two-celled teleutospores occurred, coloured similarly to the 

 ordinary teleutospore and thickened at apex. The spores were constricted 

 at septum, which might be about the middle or towards the base. They 

 were longer than the ordinary spore, and measured about 37 x 27 p. The 

 pedicel was occasionally rather lateral. 



Darluca filum Cast., occurred on the uredosori. 



(PlateXVI, Figs. 134, 135.) 



ORCHIDACEAE. 



Microtis. 

 6. Uromyces microtidis Cooke. 



Cooke, Grev. XI V., p. 12 (1885). 

 Cooke, Handb. Austr. Fung., p. 332 (1892). 

 Sydow, Ann. Myc. I., p. 324 (1903), 

 Sacc. Syll. VII, p. 579 (1888). 



Sori amphigenous, loosely arranged in irregular groups, minute, puncti- 

 form, brown, pulverulent, girt by the ruptured epidermis. 



II. Uredospores globose, subglobose, ovate or ellipsoid, minutely acule- 



ate to warty, yellowish-brown, 22-30 x 17-25 p. 



III. Teleutospores intermixed with Uredospores, ovate, with hyaline 

 apiculus, rough with warte, brown, 25-35 x 17-25 p, but mav reach 



1 p t average 32 x 24 p pedicel very short, hyaline. 

 On living leaves of Microtis porrifolia R. Br. 



New South Wales Bullahdelah, II., III. 



