USTILAGINACEAE 403 



p. 202 (iS^i). = Usiilago treubii, Solms, Ann. Gard. Bot. 

 Buitenzorg, vol. vi., 1887, p. 79, pi. ix. — Spore-mass violet, 

 forming tubercles in the inflorescence, or causing the 

 formation of clustered, elongated, furrowed outgrowths 

 up to I in. long, and terminating in a capitate head con- 

 taining the spore-mass. Spores violet or lilac, smooth, 

 globose, or broadly elliptical, 5-6 /u. diam. ; promycelium 

 short, continuous ; secondary spores coalescing in pairs 

 before germination. 



Ustilago esculenta, P. Henn., Hedwigia, 1895, p. 10. — 

 Spore-mass olive-brown, forming spherical or elongated 

 tubercles in the unexpanded inflorescence, which is de- 

 stroyed : at first covered by the whitish cuticle ; spores 

 subglobose, 7-9 X 6-8 /i, brown, smooth. 



UstilagO sacchari, Rab., Isis, 1870. — Spore-mass black ; 

 spores globose or angularly globose, 8-18 /« diam., olive- 

 brown or rufous ; epispore thick, smooth. 

 [j.vioLcLcta,. 

 Tilletia, Tul. — Spores isolated, formed by a swelling of 



the tips of fertile hyphae, forming a powdery mass at 

 maturity ; promycelium bearing a terminal cluster of 

 elongated, cylindric-fusiform secondary spores, which after 

 conjugating in pairs either give origin to a curved spori- 

 dium, or protrude a delicate germ-tube. 



Tilletia tritici. Winter, Krypt.-Flora, i. p. no (1884). — 

 Spore-mass produced in the ovary, blackish, with an olive 

 sheen, foetid; spores globose, brown, 17-22 fi, diam., 

 border i-i'5 /*, not paler; epispore furnished with ridges 

 anastomosing to form a rather large-meshed network, 

 meshes often variable in size and form. 



Tilletia levis, Kiihn, Rab., i^««^. Eur., No. 1697 (1873). 



