USTILAC40. 299 



Ust, Vaillantii Tul.-' appears in the anthers and ovaries of 

 Gagea, Scilla, Muscari, etc. The perianth of diseased llowers 

 remains, but is somewhat enlarged. The ovaries and anthers 

 become filled with spores ; the latter organs are, however, fully 

 developed and may even contain pollen-grains mixed with spores. 

 According to Brefeld, the spores germinate easily in water and in 

 nutritive solution. A promycelium is formed which, after detach- 

 ment from the spore, becomes three-celled and develops conidia. 

 These sprout for some time, then produce three-celled promycelia. 



Ust. ornithogali (Sclini. et Kze) forms leaf-swellings on Oniithogalum and 

 Gaijea. 



Ust. tulipae (HeuH.) produces swellings on the leaves of the tulij). 

 Ust. plumbea Rostr. occnrs on leaves of Arum maculatum in Denmark. 

 Ust. ficuum Reich. In the fruits of Ficus Carica in Asia Minor. 

 Ust. Trabutiana Sacc. In berries of Dracaena Draco in Algeria. 



Ust. Vrieseana YuilL- In the Botanic Garden at Amster- 

 dam, the roots of several species of Eucalyptus exhibited woody 

 tumours from which proceeded outgrowths resembling " witches' 

 brooms." These contained the mycelium of an Ustilago wliich 

 produced spores in the cortical tissues. 



Ust. (.') adoxae Bref. On Ado.ra moschatelliaa in cells of tlie subterranean 

 stem. The spores |)roduced only simple filaments without conidia. 

 Ust. Lagerheimii Bref. On Rumea from Quito. 

 Ust. Schweinfurthiana Thiim. On Lnperata cylindn'cu from Cairo. 

 Ust. boutelouae-humilis Bref. On Bouteloua humilis from Quito. 

 Ust. Ulei Henn. On Chloris. 

 Ust. spinificis Ludw. On Spinifex hirsuta from Adelaide, Australia. 



Ust. Treubii Solms.^ This Javanese fungus and the galls 

 produced by it deserve a somewhat lengthened notice on account 

 of their general biological interest. It causes a hypertrophy on 

 Polygoimm chinense in Java, which further exemplifies the 

 phenomena already noticed in connection with Cacoma deformans 

 on 'Thujoiisis (p. 30). 



The stems at attacked places show strong hypertrophy and 

 great change in their anatomical structure. Solrns designates 

 the thickenings, in common with those caused by Cacoma. 



^Tulasne, Ann. d. science natiir., Ser. in., Vol. vir., 1847, with plates of Muscari. 

 Worth G. Smith (Gardeners Chronide, xv., 1894, p. 463), gives a figure 

 and note on occurrence of this smut in Britain. (Edit.) 

 ^Vuillemin, Compt. rend,, 1894. 

 •'Solms, Annal. du jardin boian. de Buifenzor<i, Vol. vi., 1886-87, p. 79. 



