APPENDIX. 21 



o 



Coleospormm Petasitis, Lev. Eutteebur Rust; on 

 the under surface, minute, depressed, spreading, somewhat ag- 

 gregate, sub-confluent, irreguhir in form ; spores oval, orange, 

 or orange-red.— On Ttmilago Petasites. Autumn. Common. 



Coleosporiiim Campanula, Lev. Campanula Rust; 

 spots obliterated, brown on the opposite side, sori irregular, con- 

 fluent, plane, on the under surface ; spores subglobose, cohering, 

 j^eilow, at length pale. On leaves of various Campanulse. Sep- 

 tember and October. 



Coleosporium Sonehi-arvensis, Lev. Sow-thistle 

 Rust ; on the under surface, ; depressed, irregular in form, scat- 

 tered, partially confluent ; spores ovate, reddish orange.— On 

 Souchns oleraceus and arvensis. Summer. Common. (Plate 

 Yin. figs. 178, 179.) 



Coleosporium Bhinanthacearum, liev. Cow-wheat 

 Rust ; spots none or sub ferruginous ; sori irregular, confluent, on 

 the under, rarely on both surfaces ; spores subglobose, compact, 

 golden-yellow. — On Euphrasia officinalis^ Baiisia odontites, 

 Melampynim arvense, &g. August and September. Common, 

 (Plate VIII. figs. 176, 177.) 



Melampsora, Cast, 



Spores of two orders, crowded into a dense compact mass, with 

 or without a covering, wedge-shaped. Berk, Otitl., p. 333. 



Melampsora Euphorbise, Cast. Hypophyllous ; sori of 

 summer spores golden-yellow, scattered, distinct, sometimes 

 cauline ; spores small, subglobose ; sori of perfect spores becom- 

 ing black, small, roundish, spores prismatic, membrane thickened 

 above, dark brown. — On leaves and stems of Euphorbia helio- 

 scopia, E. exigua, and other species of spurge. Common. (Plate 

 IX. figs. 193, 191.) 



Melampsora Populina, Lev. Hypophyllous, epiphyllous, 

 or amphigenous, at first yellow or orange ; summer spores 

 obovate-oblong, attenuated or truncate, echinulate ; parapnyses 

 obovate, capitate or claviform, abundant in fully-ripened sori ; 

 sori of perfect spores at first tawny yellow, becoming black 

 during the winter, swelling in the spring, and becoming of a 

 cinnamon-colour, hypophyllous, roundish, or oblong- spores 

 prism-sbaped, 5—6 together, yellowish, smooth. — On leaves of 

 Fopulus nigra. Common. Spores perfected in February. (Plate 

 IX: figs. 195,190.) . 



