384 FUNGI. lUredo. 



— U. aurea, Sow. t. 320. — U. linearis, (3. Polypodii, Pers. Syn, 

 J), 217. Moug. ^ Nest.! '289.~-C(Boma Filicum, Lk. Sp. 2. p. 

 36. 



On Pteris crispa. Sowerby. On the continent it is found on 

 various Aspidia and Polypodia. 



55. U. Bquiseii, Berk. (Mares-tail Uredo); sori linear occu- 

 pying the striae of the stem, bursting longitudinally, sporidia 

 globose minute atro-sanguineous. 



On Equisetum limosum. Fineshade, Norths. Rev. M.J. Berkeley. 



** Sporidia white. 



56. U. Candida, Pers. (white Uredo) ; sporidia globose ovoid 

 or oblong with obtuse apices, white. Pers. Syn. p. 223. Moug, 

 ^Nest. I n. 190. Grev. Fl. Ed. p. 442. Sc. Crypt.Fl. t. 251. 

 Baxt.! 88 — U. Thlaspi, Sow. t. 340. Purt. 3. n. 1543. (in 

 part). — U. cruciferarmn, Dec. Syn. p. 49. Moug. ^ Nest. ! ?i. 



290. — Cceoma candiduin, Lk. Sp. 2. p. 37. 

 On Cruciferce, &c. Very common. 



57. U. cylindrospora, Fr. (cylindric-seeded Uredo) ; sporidia 

 very minute cylindrical subtruncate white. Fr. Syst. Myc. v, 

 3./?. 516. — Cylindrosporium concentricum, Grev.! Sc. Crypt.Fl, 

 t. 29. Fl. Ed. p. All. 



On both surfaces of the living leaves of Cabbages. About Edinburgh. 

 Dr. Greville. — Certainly distinct from the foregoing, and if the sporidia 

 be not conglutinated, which from authentic specimens I do not perceive 

 to be the case, not distinguishable from Uredo. The sporidia are very 

 minute, cylindrical and subtruncate, but not so abruptly as represented 

 in Dr. Greville*s figure. 



B. Sporidia unequal. 



58. U. Lini, Dec. (Piirging-flax Uredo) ; spots yellowish, 

 sori convex subrotund, scattered surrounded by the ruptured 

 epidermis, sporidia globose or pyriform sometimes pedicellate. 

 Dec. Fl. Fr. 2. p. 234. Moug. <^ Nest. ! 90. Grev. Sc. Or. 



Fl. t. 31. Fl. Ed. p. 439. Desm. f 675 CcBoma Lini, Lk. 



Sp. 2. p. 38. 



On Linum catharticum. Not uncommon. 



59. U. gyrosa, Reb. (gyrose Uredo); spots obliterated, sori 

 minute confluent and forming a small distinct ring, epiphyllous, 

 epidermis bursting, sporidia subglobose and yellow, or pyri- 

 form and pale. Reb. Neom. t. 3./. 15. Grev. Fl. Ed. p. 439. 



— U. Rubi Idcei, Pers. Syn. p. 218. — Cceoma gyroswn, Lk. Sp. 

 2. p. 38. 



On Raspberry leaves. Bahnuto. Rosslyn, Dr. Greville. Appin, 

 Captain Carmichael. — Easily known by its forming a more, or less 

 perfect, often somewhat gyrose ring, the centre being unoccupied. 

 Sporidia globose and elongato-pyriform. 



