230 MICROSCOPIC FUNGI. 



C. Spores with a papillose epispore. 



Ustilago bromivora, Waldh. Produced in the inflo- 

 rescence ; mass of spores black-brown ; spores round or elongated 

 and irregularly flattened ("006-01 mm.) ; olive-brown ; epispore 

 very finely papillose. — Un the inflorescence of Bromus mollis and 

 other species. 



Ustilago vinosa, Tul. Oxyria Smut ; produced on the 

 swollen receptacles ; spores roundish, very small, and minutely 

 papillose, separately pellucid, in clusters, violaceous.— On the 

 receptacles of Oxyria reniformis. Uncommon. 



D. Spores with a spinulose epispore. 



Ustilago Salveii, B. and Br. Cocksfoot Smut ; produced 

 on the leaves, forming elongated parallel sori on the upper sur- 

 face ; spores obovate, rather large, rough with minute granules. 

 — On leaves of Bactylis glomerata and other Grasses. Not common. 

 (Plate VI. figs. 117-119.) 



Ustilago Maydis, Corda. Maize Smut ; produced on the 

 stems, germens, &c. ; epidermis at length burstins ; spores 

 spherical, minute, brownish-black, surface covered with echinu- 

 late warts.— On stems, &c, of Zea Mays. (Plate V. fig. 103.) 



Ustilago olivacea, Tul. Olive Smut ; infesting the en- 

 larged receptacle ; epidermis soon bursting ; spores olive-green, 

 powdery, minute, mixed with filaments. — On Carex riparia. Not 

 common. (Plate VI. figs. 126, 127.) 



E. Spores with a reticulated epispore. 



Ustilago antherarum, Fr. Anther Smut ; produced 

 on the anthers and germens; spores subglobose, effuse, violet. — 

 On the anthers of Silene inflata, &c. (Plate V. figs. 102-104.) 



Ustilago intermedia, Sclircet. Produced on the florets ; 

 mass of spores violet ; spores globose or elliptic (■011-'0137mm.) ; 

 epispore c ,o ar, violet, with narrow areolee.— On the florets of 

 Scabiosa columbaria. 



Ustilago utriculosa, Tul. Utricle Smut; produced in 

 the germen and perigomum ; epidermis soon ruptured ; spores 

 effuse, minute, globose, purple-black.— On Polygonum Hydropiper 

 and other Polygona. Autumn. Not uncommon. (Plate VI. 

 figs. 112-116.) 



Ustilago receptaculorum, Pr. Goatsbeard Smut; 



