PTjccixi^i. 499 



Trichohasis cichoracearum. Lev. Ann. Sc, Nat. CooJce M.F. p, 

 208. Cooke exs. no. 68. Cooke L.F. no. 36. 



Brand-spores. Spots obliterated or whitish; son small, 

 subrotund, generally hypogenous, encircled with the ruptured 

 epidermis ; spores brown, oral, scarcely constricted. — Lk. Sp. ii. 

 p. 75. Berk. Eng. Fl. y. p. 365. Cooke M.F. t. 4,/. 67-68. Cooke 

 exs. no. 33-34. Berk. exs. no. 219. Corda. iv.f. 45. Fckl. exs. no. 

 344. Ann. Sc. Nat. (1847) t. IJ. 22-27. Kl. exs. no. 274, ii. 194. 

 Cooke L.F. no.ll-12. 



On leaves of CentaurecB, &c. Autumn. Common. 



[United States.] 



1483. Pucciuia discoidearuxn. Link. " Mug- wort Brand." 



Uredo-spores. Spots obliterated, brownish on the opposite 

 side ; sori subglobose and oyal, minute, scattered, on both sur- 

 faces ; epidermis soon ruptured; spores subglobose, brownish. 

 TricJiobasis artemisice. Lev. Uredo artemisicE. Ann. N.H.yio.lSQ. 

 Berk. exs. no. 235. Berk. Outl. p. 332. Berk. exs. no. 235. Cooke 

 M.F. ^.209. Cooke exs. wo. 1 15. 



Braxd-spores. Spots obliterated ; sori subrotund, minute, 

 surrounded by the remains of the ruptured epidermis ; sporidia 

 brown, oblong or oyoid, somewhat rhomboidal, with both cells 

 attenuated and triangular ; peduncles elongated. — Link. Sp. Fl. 

 ii.p. 73. Kl. exs.no. 190, ii. 685. Corda. iy. t. 4,/. 43. Cooke exs. 

 no. 35. P. tanaceti. B.C. Fl.Fr. ii.p. 222. Fckl. exs. no. 341. P. 

 ahsinthi. D.C. Fl. Fr.Yi.p. 58. P. artemisiarum. Kze. exs. no. 

 93. P . artemisice. Fckl.exs.no. 360. 



On Artemisia maritima and Tanacetum vulgare. 



1484. Fuccinia syngenesiazuxn. Link. " Thistle Brand." 



Uredo-spores. Uredo cirsii. Lasch. 



Braxd-spgres. SjDots obliterated ; sori minute, collected in 

 oval blackish-brown, raised spots, covered with the epidermis ; 

 spores brown ; peduncles very short. — Lk. Sp. ii. p. 74. Berk. 

 Eng. Fl. v. p. 365. Cooke M.F. t. 4,/. 63, 64. Cooke, exs. no. 35. 

 Corda. iv.f. 53. Cooke L.F. no. 13. P. cirsii, Fckl. exs. no. 340. 



On leaves of Thistles. Autumn. Common. 



Distinguished from P. compodtaruni by the sori being collected into orbi- 

 cular heaps, as well as other features. 



Y 2 



