512 C^OMACEI. 



On wheat, filling the grains. Autumn. Common. 



[United States.] 



Foetid when crushed. For particulars regarding the germination of these 

 spores, see paper by Rev. M, J. Berkeley, in Horticultural Journal, and by 

 the author in Quekett Journal, i. p. 167. {Fig. 205.) 



Gen. 171. USTILAGO, Link. 



Plant deeply seated ; sjoores simple, spring- 

 ing from delicate threads, or in closelj packed 

 cells, ultimately breaking up into a powdery 

 mass. — Berk. Outl.p. 33b. {Fig. 206.) 



Fig. 206. 



1520. XJstilago cazbo. Tul. " Corn Smut." 



Produced on the receptacle and rachis ; epidermis soon rup- 

 tured; spores loose, minute, globose, black. — Tul. Ann. Sc.Nat. 

 1847), t. 3, /. 1-12. Ustilago segetmn. Ditm. t. 33. Cooke M.F. 

 i. 5,/. 1)8-99. Cooke exs.no. 'bi:. Corda. iv. /. 9. Uredo segetum. 

 Pers. Syn.p. 224. Moug. exs. no. 291. Baxt. exs. no. 43. Eng.Fl. 

 Y.p. 374. Bull t. 472,/. 2. Kl. exs. no. 81. 



On the ears of corn and grasses. Autumn. Common. 



[United States.] 



1521. Ustilago urceoloium. Tul. " Sedge Smut." 



Produced on the glumes and utricles ; epidermis soon burst- 

 ing ; spores in a compact mass, afterwards breaking up, globose, 

 rather large, granulated. — Tul. Ann. Sc. Nat. (1847), vii. t. 4,/. 

 7-10. Cooke M.F.t.e.f. 109-111. Nees. f. 6. Kl. exs. no. 195. 

 Uredo urceolornm. B.C. Fl. Fr. \\.p. 78. Eng. Fl. Y.p. 375. Sow. 

 t. 396,/. 4. Berk. exs. no. 114. 



Surrounding the seed of various Carices as Carexprcecox, stel- 

 lulata, recurva, d^ndi pseudo-cyperus. Autumn. Rather common. 



[Mid. and Up. Carolina.] 



1522. 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. — Tul. Ann. Sc, 

 Nat. (1847), vii.^^, 76. Cooke M.F. t. 5,/. 105-107. Cooke exs. no. 

 55. Uredo longissima. Sow.t. 139. Eng.Fl. Y.p. 376. Berk, exs, 

 no. 230. Kl. exs. no. 84. 



