APPENDIX VIII 



721 



Wood (pine). 



I. Producing orange to red stains in pine wood. P. pinophilum. 



Fig. 263. — Penicillium rugulosutn. a, b. Branching of conidiophore; c, d, e, 

 conidiiferous cells and conidiospores; /fully ripe conidiospore; g, h, j, swelling and 

 germination of conidiospore;./, m, diagram of conidial fructifications. (After Thorn.) 



APPENDIX VIII 



Keys to the Genera of the ERYSiPHACEiE 



(See Salmon, Ernest S.: A Monograph of the Erysiphaceae Mem. Ton. Bot. 

 Club IX, 1900.) 



A. Perithecium inclosing only a single ascus. 



(a) Appendage simple, filamentous, unbranched. r Spharolheca. 



(b) Appendage dichotomously branched at end. 2 Podosphccra. 



B. Perithecium containing many asci. 

 {a) Spores unicellular. 



I. Perithecia with appendages. 



* Appendages often basally swollen, never enlarged into a plate, 

 t Appendage unrolled at the end, or only slightly and irregularly curled. 

 *J Appendages simple, or only irregularly branched. 

 § Appendages mycelium-like, unbranched, or slightly irregularly 

 branched. 3 Erysiphe. 

 §§ Appendages stiff, bristly, radially arranged, numerous. 4 Pleoch- 

 ceta. 

 tX Appendages frequently dichotomously branched at apex. 5 Micro- 

 sphara. 

 46. 



