286 FUNGI. [Dothidea. 



asci are figured by Kunze in S. Padi {Dotliidea fulva), Myc. Heft. 2. 

 t. ]. f. 18 ; and, though Dr. Greville finds the nuclei consisting of 

 various sized globules, there is every reason to believe that the perfect 

 plant on fallen leaves will be found furnished with asci like the nearly 

 allied species D. fulva. Fully developed fructification in GasterGmy- 

 cetes is not to be expected on still living leaves. The stroma is innate 

 in the sheath and consequently surrounds the stem, but it is not super- 

 ficial as Dr. Greville supposes. 



3. D. rubra^ Pers. (^Sloe-leaf Dothided) ; liypophyllous orbi- 

 cular bright red, at length red-brown, cells immersed red, ostiola 

 subimmersed. Fr. Syst. Myc. v. 2. p. 553. Scler. Siiec. n, 

 191. — Xyloma riibntm, Pers. Syn. p. 103. Part. v. 3. n. 1571, 

 t. 33. — Poly stigma ruhrum^ Bee. I. c. t 6./. 7. Moug. ^' Nest, f 

 n. 270. Grev. ! Fl. Ed. p. 365. Sc. Crypt. FL t. 120. Baxt. ) 

 Ox. n. 32. 



On leaves of Primus spinosa, &c. Summer and Autumn. Com- 

 mon. — Resembling at first sight a young jEcidium. 



4. B. fulva, HoU. & Schm. (tawny Bothidea) ; hypophylloiis, 

 somewhat angular tawny, cells immersed of the same colour, 

 ostiola immersed. Fr. Syst. Myc. v. 2. p. 554. Scler. Suec. 

 n. 241. — Polystigma fulvumy Bee. /. c. t. 6.f. 8. Moug. Sf Nest. 

 n.27l. 



On leaves of Primus Padus. Not uncommon in Scotland. — Larger 

 and of quite a different colour from the last. 



5. B. collieulosa, Berk. (Pear-leaf Bothidea) ; epiphyllous, 

 spots yellow, orange in the centre, cells aggregate minute yel- 

 low distinctly pierced, sporidia oozing out. Sow. t. 409, ivith' 

 out a name. 



On Pear leaves. Southcote, [June 17, 1807. John Walker^ Esq. 

 — Scarcely thickening the leaf. Sporidia not very minute, nor to be 

 confounded with the tubercles on the reverse of JE. cancellatum, which 

 are evidently abortive pseudoperidia. Sphce. rubens, Johnst. ! is the 

 abortive pseudoperidia of ^. cornutum. 



6. B. hetulina, Fr. (Birch-leaf Bothidea') ; epiphyllous angu- 

 lar but irregular tuberculated shining black, black within, cells 

 white. Fr. Syst. Myc. v. 2. p. 554. Scler. Sued n. 144. 

 Grev. Sc. Crypt. Fl. t. 200. f. 2. — Xyloma hetuUnimh Fr. Gbs. 



1. p. 198. Bee. I. c. t. 3./. 1. Moug. Sf Nest. I n. 370 b. 



Betulce 7iancB, Wahl. Fl. Lapp. t. 30. /. 3. Un. Itin. ! 



On leaves of Betula alba. Common. — b. on Betula nana, Mr. 

 Walker Arnott. 

 I 



7. B. Ulmi, Duval, (Elm-leaf Bothidea) ; epiphyllous, round- 

 ish confluent convex greyish -black, black within, cells white, 

 ostiola granulceform. Fr. Syst. Myc. v. 2. p. 555. Grev. / 

 Sc. Crypt. Fl. t. 200. / l.—Sph. ulmaria, Soiv. ! t. 374. / 3. 

 '-^Stromatosphceria idmaria, Grev. Fl. Ed. p. 359. 



On Elm leaves. Autumn. Extremely common Larger, more con- 

 vex and duller than the last, which it otherwise much resembles. 



