Uredo.^ FUNGI. 375 



2. U. Caries, Dec. (Bu/tt) ; included within the germen, 

 sporidia exactly spherical rather large globose black. Dec. Fl. 

 Ft. 6. p. 78. Grev. FL Ed. j?. 443. Johnst. FL Berw.! 2. 

 p. 204. — Uredo sitophHa, Dit:ii. I. c. t. 34. — CcBoina sitophilum, 

 Lk. Sp. 2. p. 2. 



On Wheat. Very common, exceedingly foetid when crushed. Highly 

 injurious, as the whole sample is spoiled by the bunty corn. — The 

 sporidia are much larger than in the foregoing species and contain 

 granules. 



3. U. longissima, Sow. {elongated Uredo) ; spots obliterated' 

 sori linear very long parallel dirty-olive, epidermis bursting 

 longitudinally, sporidia exactly globose minute olive-black. 

 Sow. t. 139. — Cceoma longissimum, Lk. Sp. 2. p. 4. KL ! n. 84. 



On Poa aquatica. Common. Summer. — Giving the leaves a very 

 remarkable appearance ; sporidia globose, breaking up into minute 

 granules. 



4. U.parallela, Berk, (parallel Uredo) ; sori very long linear, 

 epidermis bursting longitudinally, sporidia globose with several 

 projecting nodules dark-brown. 



On the culms and sheaths of Rye. Kensington, June 15, 1800. 

 Sowerby, Herb. 



5. U. Ii7iedris, Pers. [yellow grass Uredo); spots yellow-brown, 

 sori elliptic then elongated and linear, epidermis bursting, 

 sporidia oblong yellow. Pers. Syn.p. 216.' Grev. FL Ed. p. 440. 

 {in part). Johnst. FL Berw. 2. p. 198. — U. linearis, ct.frumenti, 

 Moug. S)- Nest.! n. 288. — CcBoma lineare, Lk. Sp. 2. p. 4. 



On the leaves and sheaths of corn and grasses. Very common. — Spo- 

 ridia oblong and globose in the same heap. 



6. U. Bubigo, Dec. (Rust); spots yellow, heaps oval scattered 

 generally epigenous, epidermis at length bursting longitudinally, 

 sporidia subglobose red-brown easily dispersed. U. Btibigo, 

 vera, Fl. Fr. 6. p. 83 Cceoma Rubigo, Lk. Sp. 2. p. 4. 



On grasses and corn. Common, but not so injurious as the true 

 njildew, {Puccinia graminis.} 



7. U. urceolorum, Dec. {Scdge-ghnne Urcdo) ; on the glumes 

 and utriculi in the latter case surrounding the abortive seed 

 with a dense mass, epidermis soon bursting, sporidia effuse 

 globose rather large. Dec. FL Fr. G. p. 78. Grev. FL Ed. 

 p. 443. Johnst. Fl. Berw. 2. p. 204. — U. Caricis, Pers. Syn. 

 p. 225. — Caoma Caricis, Lk. Sp.2. p.b. — Ustilugo lUriculorum, 

 Fr. Syst. Myc. v. 3. p. 519. — Farinaria carhonaria, Sotv. t. 396. 



/. 4. 



On various Carices. About Ediiiburtih, Dr. Grcvilk. Berwick, 

 Dr. JohiLston. Fotherinuli:«y, Norths., livv. M. J. litrhilcy.—lAuV, 

 in his specific character, culls the sporidia etliisc ; in n)y specimens they 

 form a compact nuiss, breaking up into grains like gunpowder, in the 

 centre ot which is the nearly abortive though white and slightly farinn- 



