DotJiidea.] ruNGi. 287 



8. D. Ilerdclci, Wormsk. ( Cow-parsnep Dothidea) ; growing^ 

 on either side of the leaf, confluent angulra' rugoso-tuberculate 

 opaque black, blackish within, cells white. J^?\ jSt/st. Myc, v. 

 2. p. 556. Jo/msL Fl. Beriv. 2. p. 133. 



On leaves of Heracleum Sphond>,Uum. If the specimens sent to 

 Dr. Hooker by Dr. Johnston and Mr. Piirton (from 3Ir. Baxter) are 

 the true phmt, they are certainly in an early stage of growth. 1 can- 

 not find the least trace of cells ; but the substance is homogeneous and 

 brownish, like that of Sclerotium herharum. 



9. D. Gerdiiii, Fr. (^compound Geranium Dothidea) ; hypo- 

 pliyllous, cells minute slightly prominent mouthless somewhat 

 connate and forming a spot-like orbicular tuft. Fr. Syst. 3Iyc^ 

 V, 2. p. 538. Xyloma Geranii, Grev. ! Fl. Ed, p. 368. 



, On leaves of Geranium sijlvaticum. Auchindenny woods. JD)\ 

 Greville. — " Forming black spots, 1 — 2 lines broad, dotted with the 

 slightly prominent cells which are white within." Fr. I. c. 



10. Z>. astroidea^ Berk, (^star-like Elm Dothidea) ; epiphyllons 

 black, perithecia slightly prominent connate forming small 

 irregularly stellate-aggregate tubercles. — Asteroma Ulmi, Grev.E 

 Fl. Ed. ;?. 368. Fr. EL 2. p. 152. 



On green leaves of Elms. About Edinburgh. Dr. Greville. — This 

 is not a true Asteroma, according to the definition of De Candolle, hav- 

 ing no real filaments, and is perhaps only an early stage of Dothidea 

 Jjlmi. I have removed it to Dothidea, as keeping it in Asteroma could 

 only mislead, and as there is a true species of that genus found 

 likewise on elm leaves. Fries in his specific character says " spots 

 nofie ;" in Dr. Greville's specimens, however, the starry tubercles are 

 generally seated on a small round pale spot. 



11. Z). Fumdgo, Fr. (^Speedwell Dothidea) ; epiphyllous, cells 

 very minute black shining distinct scattered or crowded into a 

 roundish spot. Fr. Scler. Siiec. ! n. 422. 



On leaves of Vei-onica officinalis. Spring. Mr. W. TTilson.—- 

 Easily distinguished by its snuitty appearance, so that at first sight it 

 may l)e taken for some Tonda. A very pretty nondescript species on 

 tlic leaves of some Poh/gomnn, has been communicated by Mr. Stock 

 to Dr. Hooker forming round spots of crowded cells. 1 do not, how- 

 ever, propose it as new, as I think nothing is gained by multiplying 

 species distinguibhcd after all chiefly by their matrix. 



12. D. Fa?iu?iculi, Vi\ (Croirfooi Dothidea); liypopliyllows, 

 spots indeterminate uniform black, tubercles subgregarious de- 

 pressed unequal. Fr. Sysf. Myc. v. 2. p. 5G2. 



On leaves oi' Jiauuncidi. Berwick, Dr. Johnston. — I have seen no 

 authentic sj)ccimens, but imagine that the plant before me is the same 

 with that of Fries, as it is evident ly variable. In one specimen, how- 

 ever, the spots are determinate, though in the same individual >ome- 

 tin)es shaded oHinto a [jaliid bonier, which, like the black part, bears 

 tubercles. 



13. D. Potentilhc, Yv. (PotctUilla Dothidea); epiphyllouB 



