Ustilago longissima, Tul. Elongated Smut; produced on the leaves in linear, long, parallel, dirty-olive patches; epidermis bursting longitudinally; spores globose, breaking up into minute granules, olive-black.—On leaves of Poa aquatica and fluitans. Summer. Common. ([Plate V.] figs. 105-107.)
Ustilago olivacea, Tul. Olive Smut; infesting the enlarged receptacle; epidermis soon bursting; spores olive-green, powdery, minute, mixed with filaments.—On Carex riparia. Not common. ([Plate VI.] figs. 126, 127.)
Ustilago hypodytes, Fr. Grass-culm Smut; produced on the culms beneath the sheaths, afterwards exposed; spores minute, subglobose, brownish-black.—On the culms of various Grasses. Summer. Sometimes not uncommon. ([Plate V.] figs. 100, 101.)
Ustilago Maydis, Corda. Maize Smut; produced on the stems, germens, &c.; epidermis at length bursting; spores spherical, minute, brownish-black, surface covered with echinulate warts.—On stems, &c., of Zea mays. ([Plate V.] fig. 108.)
Ustilago Montagnei, Tul. Beaksedge Smut; produced on the seeds; epidermis bursting; spores slightly angular, small, dark-coloured, intermixed sparingly with fragile filaments.—On seeds of Rhyncospora alba. Not common. ([Plate V.] figs. 96, 97.)
Ustilago typhoides, B. and Br. Reed Smut; prodded on the stems of reeds, forming thick bullate patches several inches long, occupying whole internodes, covered by their sheath; spores globose, rather large.—On stems of Arundo phragmitis. Autumn. Not uncommon. ([Plate VI.] figs. 128, 129.)
Ustilago Salveii, B. and Br. Cocksfoot Smut; produced on the leaves, forming elongated parallel sori on the upper surface; spores obovate, rather large, rough with minute granules.—On leaves of Dactylis glomerata and other Grasses. Not common. ([Plate VI.] figs. 117-119.)
Ustilago grammica, B. and Br. Banded Smut; forming little transverse bands consisting of short parallel black lines, 1/12 of an inch or more in length; spores globose, very minute.—On stems of Aira aquatica and A. cæspitosa. Uncommon. ([Plate VI.] figs. 120-122.)
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.
Ustilago utriculosa, Tul. Utricle Smut; produced in the germen and perigonium; epidermis soon ruptured; spores effuse, minute, globose, purple-black.—On Polygonum hydropiper and other Polygona. Autumn. Not uncommon. ([Plate VI.] figs. 112-116.)