MO NOBLEPH ARID ALES 721 



KEY TO THE SPECIES OF MONOBLEPHARELLA 



Male and female gametangia both formed ; oospores typically exog- 

 enous 

 First formed gametangium of a pair female, the male gametangium 

 hypogynous or terminal on a short branch subtending the female 

 Male gametangium hypogynous, less than five times as long as 

 wide; female gametangium bearing a single oosphere, rarely 



more M. taylori, p. 721 



Male gametangium hypogynous or terminal on a short branch 

 subtending female, more than five times as long as wide; 

 female with one to three oospheres, rarely more . . M. elongata, p. 722 

 First formed gametangium of a pair male, female terminal on a short 

 branch subtending male or directly beneath it, or intercalary; 

 male terminal or epigynous, never hypogynous 

 Female gametangium always terminal on a short branch sub- 

 tending the male; male gametangium predominantly more 



than 15 \j. in length M. mexicana, p. 723 



Female gametangium frequently formed directly beneath the male, 

 male gametangium then appearing epigynous, and less than 



15 [J. in length M. laruei, p. 724 



Male gametangium apparently lacking; oospores typically endogenous 



M. endogena, p. 725 



MONOBLEPHARELLA TAYLORI SparrOW 



Allan Hancock Pacific Expeditions, Publ. Univ. S. Calif., 3(6): 103, pis. 16- 



17. 1940 

 (Fig. 51, p. 710) 

 Monoblepharis taylori Sparrow, Mycologia, 31:737. 1939. 



Mycelium well developed, consisting of tenuous flexuous branched 

 hyphae mostly 2-5 \l in diameter, often with swellings of various shapes, 

 the contents reticulately vacuolated; sporangia narrowly siliquiform or 

 fusiform or cylindrical, with a tenuous wall, variable in size, 18-115 u. 

 long by 5-20 \l in diameter, with a very narrow (2.5-4 jx) base, occurring 

 singly or in pairs at the tips of the hyphae or after sympodial branching 

 of a hypha appearing lateral; zoospores ovoid or somewhat cylindrical, 

 7-10 \i long by 4.5-6 \l wide, the posterior fiagellum from two to three 

 times the length of the body; oogonium at first terminal or, after 

 sympodial branching of the supporting hypha, often appearing lateral, 

 clavate or obpyriform, with rounded apex and narrow cylindrical base 

 10-22 \x long by 7-16 \i wide tapering to 2-3 u. at the base, the contents 



