374 FUNGI. [Uredo. 



sporidia at length white. Dec. Fl. Fr. 6. p. 95. — C, Legu- 

 minosatum, Lk. 2. 61. 



On the stems and leaves of Orobus tuberosus. Scotland, Dr. 

 Greville. 



29. ^. Euphorbice, Pers. {Spurge ^cidiuni); spots obli- 

 terated, leaf incrassated, pseudoperidia scattered and crowded 

 distinct generally hypogenous, sporidia orange. Pers. in 

 GmeL Linn, v. 2. p. 1473. Sgji. p. 211. Purt. 2 4^ 3. n. 

 1537. — CcBoma EuphorUalum^ Lk. Sp. 2. p. 61.—^. Cypa- 

 rissics, Moug. «3r Nest. ! n. 87. 



On Spurges. Common. 



30. ^. UrticcB, Dec. {Nettle yFcidiurn) ; spots obliterated, 

 subiculum incrassated, pseudoperidia disposed in elongated or 

 subrotund heaps at first subglobose then widely gaping hypo- 

 genous, sporidia orange. Dec. Fl. Fr. 2. p. 243. Moug. 4' 

 Nest. ! n. 389. Grev. Fl. Ed. p. 445. Johnst. Fl. Berw. 2. 

 p. 206. Desm. ! n. 676. 



On Nettles. Extremely common. 



31. IE. Pini, Pers. {Pine jEcidium) ; pseudoperidia oblong 

 somewhat compressed scattered bursting irregularly, sporidia 

 orange. Pers. in Gmel. I. c. Syn. p. 213. Moug. ^ Nest. ! 

 n. 186. Grev. Sc. Crypt. Fl. t. 7. Fl. Ed. p. 444.^Cceoma 

 Pineum, Lk. Sp. 2. p. 66. 



On the leaves and bark of Scotch Firs. Common in the highlands 

 of Scotland and occasionally occurring in England, especially in young 

 plantations. On branches it is sometimes two -lines or more high. 



154. Uredo. Pers. Uredo. 



Sporidia* free, aggregate, covered by the epidermis of living 

 plants. — Name, U70, to burn. 



A. Sporidia equal. 

 * Sporidia yellow^ broivn, black. 



1. U. segetum, Pers. {Smut) ; on the receptacle and rachis, 

 epidermis soon ruptured, sporidia loose minute perfectly spheri- 

 cal black. Pers. Syn. p. 224. 3Ioug. 4^ Nest. ! n. 291. Grev. 

 Fl. Ed. p. 442. Jo/uist. FL Berw. 2. p. 203. Baxt. ! n. 43. 

 — Ustilago segetum, Ditm. St. Deutsch. Fl. t. 33. Fr. Syst. 



Myc. V. 3. p. 519 CcEoma segetwn, Lk. 2. p. I. Kl. ! n. 81 — 



Beticularia segetum^ Bull. t. 412. f. 2. With. 4. p. 356. Purt. 

 2 S^S.n. 1079. 



On wheat, barley, oats, &c. Very common and destructive. 



* Such is the state of the sporidia in normal Uredines. But many of the 

 species approach very near to Puccinin, being attached by more or less per- 

 fectly developed peduncles, and differing only in being simple and not septate. 



