Physarum. , 295 



Physarum roseitm, Berk, and Broome, Fungi of Ceylon, ii., 

 n. 760, in Journ. Linn. Soc., vol. xiv., p. 84; Host., Mon. 

 Append., p. 10; Sacc., Syll., vii., 1, n. 1194. 



(Type in Herb. Berk., Kew.) 



On grass, moss, bark, &c. Ceylon ; Paraguay. 



Gregarious, 2'5 3 mm. high. Closely allied to Physarum 

 pulcherrimum, of which the present species may eventually 

 prove to be only a variety. The spores are generally smooth 

 under a T Vth objective, but some show a minutely verruculose 

 surface. 



Physarum ornatum, Peck. .f.oj^^V"^ 



Sporangia depressed or hemispherical, plane or slightly con- 

 cave beneath, greenish-cinereous, dotted with small yellow 

 granules, the empty walls whitish ; stem short, black or blackish- 

 brown, generally longitudinally wrinkled when dry; columella 

 none ; capUlitium with numerous, yellow, knot-like thickenings ; 

 spores globose, smooth, violet-brown in the mass, '0004' '0005' 

 in diameter ( = about 10 11 /x). 



Physarum ornatum, Peck, 31st Report of N. York State Mus., 

 p. 40; Sacc., Syll., vii., 1, n. 1220. 



Decaying wood. Albany, U. S. 



Physarum Petersii, B. and C. ?.?<AtV.s> 



Gregarious, stipitate, sporangia globose, wall thin, yellow, 

 with a thin sprinkling of minute particles of lime that soon 

 disappears ; stem elongated, slender, subequal or slightly thicker 

 below, expanded at the base into a small, orbicular hypothallus, 

 reddish-brown, longitudinally wrinkled and filled with lime; 

 columella subglobose or shortly cylindrical, whitish ; capillitium 

 rather dense, forming an irregular network, threads thin, with 

 scattered, elliptical, interstitial swellings containing yellow granules 

 of lime, nodes rarely swollen ; spores dirty lilac, smooth, 7 8 p 

 diameter. 



Physarum Petersii, B. and C., Grev., vol. ii., p. 66; Host., 

 Mon., p. 116, Append., p. 6 ; Sacc., Syll., vii., 1, 1174. 



