CiEOMACEI. 513 



On leaves of Poa aquatica and P. Jluitans. Summer. Com- 

 mon. 



" Giving the leaves a very remarkable appearance." — Eag. Fl. 



1523. Ustilago olivacea. Tul. " Olive Smut." 



Infesting the enlarged receptacle ; epidermis soon bursting ; 

 spores olive-green, powdery, minute, mixed with filaments. — 

 Tul. Ann. Sc. Nat. (18-47;. Cooke M.F. t. 6,/. 126,127. Cooke 

 exs.no. 298, vii. t. 4,/. 11. Uredo olivacea^ Eng. Fl. Y.p. 376. 



On Car ex riparia. 



1524. Ustilago hypodytes. Fr. *' Grass-culm Smut." 



Produced on the culms beneath the sheaths, afterwards ex- 

 posed ; spores minute, subglobose, brownish-black. — Tul. Ann. 

 ;Sc.iV^a^(1847), vii.^.3./. 14. Cooke M.F. t.h,f.lOO,l(}l. Cooke 

 exs. no. 56. B. ^' Br. Ann. N.H. no. 256, 481. Uredo hypodytes, 

 Desm. exs. no. 473. Kl. exs. no. 83. 



On the culms of various grasses. Summer. [Low. Carolina.] 



1525. 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. — Tul. Ann. Sc. Nat. (1847), vii. t. 

 2. Cooke M.F. t. o,f. 108. Kl.exs.no. 193. Corda. Icon. iy. 3. 

 Philip. Traite. t. 5, 6, 7. 



On stems, &c., of Zea mays. [United States.] 



(Fig. 206, spores magnified.) 



1526. Ustilago znontagnei. Tnl. "Beaksedge Smut." 



Produced on the seeds ; epidermis bursting ; spores slightly 

 angular, small, dark-coloured, intermixed sparingly with fragile 

 filaments. — Tul. Ann. Sc. Nat. (1847), vii, t. 5,/. 31. Cooke M.F. 

 t. 5,/. 96, 97. B. 4- Br. Ann. N.H. no. 479. 



On seeds of Rhyncospora alba, [Low. Carolina.] 



1527. Ustilago grandis. Tul. "Reed Smut." 



Produced on the stems of reeds, forming thick bullate patches 

 several inches long, occupying whole internodes, covered by 

 their sheath ; spores globose, rather large. — Tul. Ann. Sc. Nat. 

 { 1847), vii^. 78. Ustilago typhoides, B. ^ Br. Ann. N.H. no. 480. 

 Cooke M.F. t. 6,f. 128, 129. 



