634 THE FUNGI WHICH CAUSE PLANT DISEASE 



Conidiophores more or less 

 straight 

 Conidia rhombic or 



biconic 8. RhombostilbeUa, p. 635 



Conidia globose to fu- 



soid 9. Ciliciopodium. 



Synnema polycephalous 

 Terrestrial, large, 1-2 cm.;. 



conidia ovoid 10. Macrostilbiun. 



Not terrestrial, small; co- 

 nidia elongate-ovate. . 11. Chondromyces. 

 Conidiophores conidium-like, sep- 

 tate; monocephalous 12. Atractiella. 



Head spiny with radiating spic- 

 ules 



Spicules conic, granulate 13. Actiniceps. 



Spicules with many curved 



branches at middle 14. Heterocephalum. 



Head of conidia persistent below, 



splitting above 15. Pilacre. 



Conidia in chains 

 Synnema with conidia above; conidia 

 without mucus 



Synnema not pubescent 16. Coremium, p. 635. 



Synnema pubescent 17. Lasioderma. 



Synnema with conidia below; conidia 



with mucus 18. Microspatha. 



Conidial part cylindric or long-clavate 

 Conidia more or less equally scat^ 

 tered 



Sterigmata denticulate, branched 19. Cladosterigma. 



Sterigmata none or simple 20. Isaria, p. 635. 



Conidia in lateral heads or racemes 

 Conidia in racemes; synnema lo- 



bate 21. Peribotryum. 



Conidia in heads 

 Conidiophores with lateral nodes, 

 usually escaping through the 



stomata 22. Helostroma. 



Conidiophores without nodes, usu- 

 ally entomophilous 23. Gibellula. 



