EXOSPORE^E 19 



plant seems to be in autumn exceedingly common. Micheli 

 not only described the form but figured it nearly two hundred 

 years ago. Micheli's figure is good, as is that of Mueller, 

 Fl. Dan., I.e. Mueller referred the species to a Linnean genus 

 Byssus, which seems to have included Algae rather than any- 

 thing else, if one can determine its limits at all. The same 

 thing is true of Tremella ; but this name is now otherwise 

 applied, as are all the other generic names down to Ceratiuin, 

 Alb. and Schw. But this had been by Schrank preoccupied, 

 1793. See the reference above for 1889. As for specific name, 

 there seems no reason to depart from the rule of priority, 

 since Mueller's work is determinative. 



Common everywhere in summer on decaying sticks and 

 wood of every description, especially in wet places. Alaska to 

 Nicaragua. 



2. CERATIOMYXA PORIOIDES (Alb. and Sc/nv.) Scliroeter. 



1805. Ceratium porioides Alb. and Schw., Consp. Fung., p. 359. 



1829. Ceratium porioides Fries, Syst. Afyc.. III., p. 295. 



1873. Ceratium porioides Fam. and Wor., Mem. Acad. Imp., XX. 3, p. 5. 



1889. Ceratiomyxa porioides Schroeter, Ene;l. n. Prantl, I. i., p. 16. 



1894. Ceratiomyxa mucida Schroet. van porioides Lister, Mycetozoa, p. 26. 



Entire fructification confluent into a mucilaginous mass, 

 porose. Pores ample, angulate, at length radiate-dentate. Spores 

 as in the preceding. 



Of these two species Fries remarks : "... duae sunt dis- 

 tinctissimas, inter has vero longa formarum intermediarum 

 series." Famintzin and Woronin not only concur, but consider 

 it were more fitting to place the present species in a distinct 

 genus, as Polyporus is set off from Hydnnm, The intermediate 

 series is a fact, however, and even specific difference hard to 

 maintain in this part of the world. The color is most incon- 

 stant, - - white, rosy, yellow. 



Iowa, Tennessee, Missouri. Probably common everywhere. 



