Parasitic Fungi of Illinois. 427 



hand, but it contains nothing to contradict the supposition 

 that they belonged to some of the many forms of the species 

 under consideration; and this is so abundant in all parts of the 

 country, that there can be no reasonable doubt that the above 

 supposition is correct. 



Accepting this view of the case, priority demands the use of 

 the name given by Schvveinitz, rather than the more familiar 

 one by Cooke and Peck; hence we write M. quercina and not 

 M. extensa. 



M. elevata, Burrill. 



(Bull. 111. St. Lab. Nat. Hist, Vol. I., No. 1, p. 58.) 



Mostly epiphyllous. Mycelium abundant, persistent, fre- 

 quently covering the leaves for some time before the appear- 

 ance of perithecia; perithecia usually few, occasionally abund- 

 ant, 100-1 20,u, reticulations large, evident when young; append- 

 ages 6-12, sometimes more, 3-4 times as long as the diameter 

 of the perithecium, hyaline, slightly colored at base, smooth, 

 2-4 times dichotomous, branches short, not swollen, tips at first 

 truncate, divergent, becoming acute and recurved; asci 4-8, 

 ovate, about 33 by 60/*; spores 4-6, mostly 4. 



M. elevata, n. sp. Upper sides of leaves of Catalpa bignonioides. 

 Mycelium thin, web-like, rather evanescent. Conceptacles .004 in., 

 conspicuously reticulated, raised from the leaf ; appendages about 

 twelve, colored at base, often simple, sometimes branched near the 

 base, usually 2 to 4 times dichotomously forked, very long; sporangia 

 four, oval, strongly rostrate.— Burrill, 1. c. 



On Catalpa bignonioides: Jackson, Nov. 5, 2256; Union 

 Oct. 2, 6537; Champaign, Oct. 17, 6571; Oct. 20, 6577. Ca- 

 talpa speciosa: Union, Sept. 15 (Earle). 



This species sometimes involves the foliage of an entire 

 tree, giving it a gray color noticeable at some distance, and 

 causing the leaves to fall prematurely. 



The appendages resemble those of M. vaccinii: but the 

 branches are not swollen and the tips are usually recurved. 



Microsphaera . 



Epiphyllous. Mycelium delicate, sub-persistent; perithecia 

 small, 80-100 ^, reticulations small, indistinct; appendages 



