CuxxixGHAM.— The. Ustilagineae, or “ Smuts,” of New Zealand. 429 
2. Sorosporium solidum (Berkeley) McAlpine. (Text-fig. 21.) 
Е McAlp., Smuts Austr., p. 183, 1910. 
Ustilago solida Berk., Fl. Tas., vol. 2, p. 270, 1860. Urocystis solida F. v. Waldh., 
Apercu Syst. Ust., p. 38, 1877. 
Sori in occasional spikelets, partly enclosed within the glumes, at first 
- eompact, becoming pulverulent, black, elliptical, 3-4 mm. long. Spore-balls 
subglobose to elliptical, often irregular, composed of from 15 to 50 or more 
similarly coloured spores somewhat firmly united, attaining a size of 
15x50 
smooth, dark chestnut-brown, 1 mmm. : 
ost: Schoenus Carsei Cheesem. In spikelets. Herb. No. 423. 
Auckland, T. Patterson! Oct., 1921. 
Distribution : Australia. 
The host is confined to the swamps of the Auckland and Taranaki 
Provinces (Cheeseman, 1906, p. 781). 
The New Zealand form differs from the description given by McAlpine 
in that the sori are (when mature) pulverulent, the spore-balls larger, and 
the spores slightly smaller (McAlp., 20-24 mmm. long.). 
I have been unable to germinate the spores. 
Е 1. Urocystis Rabenhorst. 
Rabenh., Klotsch, in Herb. Viv. Myc., ed. 2, No. 393, 1856, 
Polycystis Lev., Ann. Sci. Nat., ser. 3, vol. 5, p. 269, 1846. 
Sori in the form of dark-coloured pulverulent masses of spore-balls, 
usually in the leaves and stems of the host, occasionally in the inflorescences. 
Spore-balls compact, permanent, of one or many fertile cells, enclosed 
istribution : World-wide. 
The following species is the sole representative of the genus that has 
been as yet collected in New Zealand. 
Members of the genus have been found on the following host families : 
Gramineae, Cyperaceae, Juncaceae, Liliaceae, Amaryllidaceae, Ranuncu- 
ЕД 
an indistinguishable semi-gelatino : he central portions of this 
the spores become differentiated ; the outer layer of the mass consists 
of slender branches derived from the gelatinous mass of hyph These 
become divided by transverse septa into numerous short cells; several 
persist as the sterile envelope so characteristic of the genus, the remainder 
become absorbed as the spores mature. 
