APPENDIX. 229 



little transverse bands consisting of short parallel black lines, 

 ■s^ of an inch or more in length ; spores globose, very minnte.— 

 On stems of Aira aquatica and A. ccespUosa, Uncommon. (Plate 

 VI. figs. 120-] 22.) 



TJstilago longissima, Tul. Blongateb Smut ; produced 

 on the leaves in linear, long, parallel, dirty-olive patches ; epi- 

 dermis bursting longitudinally ; spores glotiose, breaking up into 

 minute granules, ofive-blaok. — On leaves of Poa aquatica and 

 fluitans. Summer. Common. (Plate V. figs. 105-107.) 



TJstilago hypodytes, i'r. Gkass-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.) 



TJstilago segetum, Ditm. CoaN Smut; produced on the 

 receptacle and rachis; epidermis soon ruptured; spores loose, 

 minute, globose, black. — On the ears of Corn and Grasses. A.a- 

 tumn. Very common. (Plate V. figs. 98, 99.) 



TJstilago typhoides, B. and Br. Keed Smut ; produced 

 on the stems of reeds, forming thick bullate patches several inches 

 long, occupying whole internodes, covered by their sheaths; spores 

 globose, rather large. — On stems of Arundo phragmitis. Autumn. 

 Not uncommon. (Plate VI. figs. 128, 129.) 



b. Epispore violet. 



TJstilago Candollei, Tul. Developed in the ovary ; mass 

 of spores blackish-violet ; spores globose, ovoid-globose, and a 

 little flattened (about 'Oll-'OM mm.) ; epispore smooth, dull rosy- 

 violet. — In the ovaries of Polygonum ayckopiper and other species. 



B. Spores with a granular epispore. 



tTstilago Montagnei, Tul. Beakset)gb Smut ; produced 

 on the seeds ; epidermis bursting ; spores slightly angular, small, 

 dark-coloured, intermixed sparingly with fragile filaments. — On 

 &te^ oi Rhyncospora alba. Not common. (Plate V. figs. 96, 97.) 



TJstilago ureeoloruin, Tul. SEiieB Smut; produced on 

 the glumes and utricles ; epidermis soon bursting ; spores in a 

 compact mass, afterwards breaking up, globose, rather large, 

 granulated. — Surrounding the seed of various Carices ; as, Carex 

 prceeox, stelhlata, reeurva, and pseudo-cyperus. Autumn. Not 

 uncommon. (Plate VI. figs. 109-111.) 



