HYPOCREALES 



43 



The family Perisporiaceae contains some twenty genera and the 

 Microthyriaceae as many more. 



LITERATURE. 



Lindau. Die naturlichen Pflanzenfamilien, i 1 : 325-343. 



Saccardo. Sylloge Fungorum, i: 1-87; 2: 658-671; g: 364- 

 442, 1053-1072; n: 252-271, 379-382. 



Leville. Organisation et disposition methodique des especes 

 qui component les genre erysiphe. Ann. Sc. Nat. III. 15: 109- 

 179. PL 6-1 1. 1851. 



Tulasne. Selecta Fungorum Carpologia. i: 1861. 



Burrill & Earle. The parasitic Fungi of Illinois. Part II. 

 Bull. 111. State Lab. Nat. Hist. 2: 387-432. 1887. 



Ellis & Everhart. North American Pyrenomycetes, 2-58. 

 1892. (The Erysiphaceae are by Burrill.) 



Harper. Die Entwickelung des Peritheciums bei Sphaerotheca 

 Castagnei. Berichte deutsch. bot. Gesell. 13: 475-481. PI. JQ. 

 1895. 



Martin. Synopsis of the North American Species of Asterina, 

 Dimerosporium and Meliola. Jour. Myc. i: 133-139, 145-148. 

 1885. 



Order 6. HYPOCREALES. 



The Hypocreales are for the greater part light colored fungi of 

 various habits, some parasitic on the higher plants, others para- 

 sitic on fleshy fungi, others still on insects, while numerous species 

 are saprophytic. Their color ranges in different species from 

 white to yellow and on to purple, scarlet and cinnabar red. A 

 few are plain brown but none of them are really black, a some- 

 what artificial distinction that separates this order from the Sphae- 

 riales. 



Among the members of this group one of the most common is 

 known as ergot. This fungus produces enlarged hard bodies in the 

 kernels of rye and other grasses ; these are known as sclerotia * 

 and in this condition they pass the winter season. In the spring the 

 mycelium of the sclerotium becomes active and produces a series 



* Sclerotia are produced on a number of species of fungi belonging to 

 widely different groups. They are receptacles of nutrition in a dormant 

 condition intended to carry the organism over an unfavorable period. 



