C)2 TABULAR ARRANGEMENT, ETC. 



349. Appendages dichotomous. Sporangium single. 



PoDOSPHJERA, Kze. 



350. Appendages floccose. Sporangium single. 



SpujEkotiieca, Lev. 



351. Appendages needle-shaped, rigid. Sporangia 



numerous. Phyli actinia, Lev. 



352. Appendages hooked. Sporangia numerous. 



TJncinula, Lev. 



353. Appendages dichotomous. Sporangia numerous. 



MICROSPH.ERA, Lev. 



354. Appendages floccose. Sporangia numerous. 



Erysiphe, Iledw. 



355. Perithecia brittle. Asci linear. Sporidia lemon- 



shaped, dark. Ch^tomitjm, Kze. 



356. Perithecia thin, seated on branched threads. 



Asci linear. Sporidia elliptic, dark. 



Ascotricha, Berk, 



357. Perithecia reticulated, coloured, seated on muce- 



dinous threads. Asci delicate. 



EUBOTIUM, Link. 



Order XXX.-- ONYGENEI. 



Peridium of closely woven threads ; sporidia in a com- 

 pact dusty mass. 



( 'Cnus. 



358. Parasitic on animal substances. Peridium sti- 

 pitate. Asci delicate. Sporidia forming a 

 dusty mass. Onygena, Pert. 



