1260 Wisconsin Academy of Sciences, Arts and Letters. 
Comatricha Persoonii Rost. 
1875. Comatricha Persoonii Rost., Mon., p. 201. 
Macbride: “ Sporangia gregarious, erect, cylindric, obtuse, 
pale brown, stipitate; stipe short, one-half to one-third the total 
height, 1-1% mm., black, slender, even; hypothallus thin, scanty, 
transparent or white; columella black, tapering gradually to the 
apex, or very near it; capillitium very dense, formed of flexuous 
fuscous threads, branching abundantly, especially outwardly, 
and ending in numerous short, free tips; spores covered with 
distinct but scattered warts, pallid, tinged with purple, 9-10 /a.” 
Macbride also says: “This species in form and stature closely 
resembles C. tyhina, but differs in the capillitial structure and 
the epispore markings. In these particulars it more nearly cor¬ 
responds with C. pulchellai, from which its slender cylindric 
form and blunt, sometimes widened apex distinguishes it.” 
Lister has no single species to which this corresponds. 
Massee does not recognize the genus Comatricha, but puts all 
of these forms in the genus Stemonitis. He does not give C. 
Persoonii among his synonyms, and does not describe any form 
which corresponds to this as Macbride describes it. 
Of this species I have but one group. I find the sporangia, 
including the stipe, from 2 to 3 mm. high, the stipe alone %■ to 
1 mm. The spores are dusky, warted, and about Sfi in diameter. 
This collection was made in Vilas woods, July 16, 1904. 
Comatricha flaccida (Lister) Morgan. 
1894. Comatricha flaccida (Lister.) Morgan, Jour. Cin. Soc., 
p. 51. 
Macbride: “Sporangia semi-erect, closely crowded in tufts 
an inch or two in diameter, ferruginous, from a dark brown 
hypothallus, sessile or short stipitate; columella weak, crooked, 
percurrent, generally enlarged irregularly at the apex; capilli¬ 
tium of few slender brown branches which anastomose sparsely 
and irregularly; spore-mass ferruginous brown; spores by trans¬ 
mitted light bright reddish brown, minutely warted, 8-10^.” 
Lister adopts the name Stemonitis splendens Rost., but al¬ 
though Macbride gives this name (var. flaccida) as a synomym, 
