40 MYXOMYCETES. 



usually very small, globose, or ellipsoid, chalky-white; capillitium 

 bright-violet, combined into a thick net ; spores dull-violet, faintly 

 spinulose, -0083 mm. diam. Rtfki. Mon., 180. 



On dead leaves. (Fig. 138.) 



Mucilago 7, Mich., t. 96, f. 6 (1729). 

 Lycogala, Hall, No. 2143 (1763). 

 Reticularia sphceroidalis, Bull., 446, f. 2 (1791). 

 Diderma globosum, Pers. Disp., t. 1, f. 4, 5 (1797) ; Eng. Fl., 

 v. ; p. 312 ; Cooke Hdbk., No. 1114. 



Didymium candid-urn , Schrad. Nov. Gen., 25 (1797). 

 Didymiwn globosum, Chev. Fl. Par., t. 9, f. 28 (1827). 

 Physarwn sphceroides, Chev. Fl. Par., 339 (1827). 

 Cionium globosum, Spr. iv., 529 (1827). 



Sub- Genus 4. Leangium. 



Wall of sporangium single, crustaceous, very much loosened 

 from the inner mass of spores and capillitium, the latter often 

 covered by a single stratum of flattened, polygonal, angular, close- 

 fitting spores ; sporangium often splitting in a stellate manner. 



43. Chondriodexma Trevelyani. (Grev.} 



Sporangia ovate or globose, sessile, splitting in a stellate manner 

 into numerous, regular, linear, somewhat reflexed, pointed lacinise ; 



columella very small, globose ; capillitium ?; spores, ? 



Rtfki. Mon., 182. 



On Bryum ligulatum. (Figs. 161-163.) 



Leangium Trevelyani, Grev., S. C., Fl. t. 132 (1825). 

 Cionium Trevelyani, Spr. Sys., iv., 529 (1827). 

 Diderma Trevelyani, Fr. S. M., iii, 105 (1829) ; Eng. Fl., v., 311 ; 

 Cooke Hdbk., No. 1111. 



Polyschismium Trevelyani, Corda Ic., v., p. 20 (1842). 



44. Chondrioderma radiatum. (Linn.) 



Sporangia roundish or lenticular, flattened, almost sessile, or with 

 a stiff, erect, upwards thickened stem, umbilicate below, brown- 

 white, when mature splitting, in a stellate manner, into from four 

 to eight unequal but regular divisions ; columella always distinct, 

 either globose or ovate ; threads of the capillitium violet, either 

 simple or fasciculate, expanded above here and there in globose 

 swellings ; spores violet, spinulose, -0092--0125 mm. diam. Rtjki. 

 Man., 182. 



On bark of trees, &c. (Figs. 155, 156, 152, 153 and 170.) 



