CuxNiNGHAM.— The Ustilagineae, or “ Smuts,” of New Zealand. 412 
7. Ustilago bullata Berkeley. (Text-fig. 6, and Plate 42, fig. 3.) 
Berk., Fl. N.Zz vol. 2, p. 196, 1855. 
Son in inflorescences, at first enclosed in a lead-coloured membrane, 
when semi-compact, becoming exposed, when pulverulent, blac 
Spores globose to shortly elliptical, 8-12 x 7-8 mmm. ; epispore closely 
and finely verrucose, olivaceous, 1 mmm. thick. 
Host: Agropyron scabrum (Lab.) Beauv. In inflorescences. North 
Island, W. Colenso. 1849. (Туре in Herb. Kew.) 
Distribution: Australia. 
The host is indigenous and widespread; it occurs also in Australia 
Ep a 1906, p. 923 
This species was described by Berkeley from materia] forwarded by 
Colenso e Kew. I have no New Zealand material in the herbarium, the 
above description being drawn up from Australian material kindly for- 
warded by Mr. C. C. Brittlebank, Plant Pathologist, Department of Agri- 
culture, Melbourne. 
ion.—McAlpine mr 152) has successfully germinated the 
spores of this species. He found ‘that in water the probasidium became 
three-celled, the саана cell eventually developing into a well-developed 
Ерт hypha; по conidia were produced, but in pues solution a 
robasidium was produced, which gave rise to numerous coni 
8. Ustilago comburens Ludwig. (Text-fig. 4, and Plate 41, fig. 3.) 
Ludw., Zeitschr. Pflanzenkr., vol. 3, p. 139, 1893. 
U geni иа Mass. S се Kew Bull., p. 160, 1901. U. exigua Syd., 
Ann. Myc., vol. 1, p. 177, 1903. 
Sori in аны get iode at t first compact, bullate, and covered with 
a lead-coloured membrane, later destroying the entire panicle and becoming 
exposed on the rachis as a dense bronze pulverulent mass, eventually 
falling uec leaving the naked axis. 
s globose to shortly elliptical, 2 x 2-3 mmm. ; epispore smooth, 
Host: Danthonia Buchanani Hook. = In panicles. Herb. No. 497. 
Dunstan Mountains (Otago), 350 m., W. D. Reid / 6 Dec., 1921. 
Distribution: Australia. 
The host is endemic, and is M to the mountain regions of the 
South Island (Cheeseman, 1906, p. 91). 
The species is characterized by dio exceedingly minute size of the spores. 
It was first recorded on a species of Stipa, but McAlpine (1910, p 154), 
‘who has examined portion of ш type material states that the ав іп 
question is a species o 
I have been unable to арий аре the spores. 
9. Ustilago Readeri Sydow. (Text-figs. 9, 27, and Plate 43, figs. 2, 3.) 
| Syd. in letter; McAlp., Smuts. Austr., p. 159, 1910. 
Ustilago Agropyri McAlp., Ag. Gaz. N.S.W., vol. 7, р. 154, 1896. 
Е ш spikelets, stems, and leaves, commonly destroying the entire 
inflor On stems and leaves forming conspicuous striae; in in- 
"Resta at first enclosed within the leaf- sheath, becoming exposed and 
appearing in the form of semi-compact masses covered with the remnants 
of the glumes, when greyish in -— at ne naked, pulverulent, black, 
- finally falling away leaving the bare a 
