LAMPRODERMA.] STEMONITACE^E. 131 



L. pliysaroides, which it very closely resembles, in the shape of 

 the columella, and the smaller size and less strong warting of the 

 spores. 



Hob. Alsace (Schimper). 



The characters above given are frequently met with in typical 

 developments of L. physaroides. 



7. L. leucosporum Host., Mon., App., p. 26. Sporangia globose, 

 0*5 mm. diam., iridescent. Stalks black, shining, subulate, slender. 

 Columella cylindrical, truncate. Capillitium dusky after the dis- 

 persal of the spores ; composed of variously branching threads 

 combined into a very dense network. Spores violet, smooth, 

 8 to 9 fj. diam. L. niyrescens Host., Mon., p. 205. 



Hob. Eberbach, Germany (Fuckel) ; Paris (Roze). The specimen 

 from Roze has colourless capillitium. 



This description applies to L. violaceum. 



8. L.Fuckelianum Host., in Fuckel, Symb., Nachtr., p. 69 (1873). 

 Sporangia globose, almost sessile, O75 mm. diam., iridescent red, 

 slightly umbilicate beneath. Stem, short, inconspicuous, pene- 

 trating the sporangium as a short conical columella. Capillitium 

 loosely branching, combined into a network by transverse 

 branchlets. Spores pale violet, marked with minute ridges uniting 

 to form a reticulation, 8 to 9 yu, diam. Mon., p. 207, tab. xiii., 

 fig. 6. 



Hal). On the twigs and leaves of oak. Eberbach, Germany (Fuckel). 



9. L. minutum Host., Mon., App., p. 26. Sporangia globose, 0*6 

 mm. diam., somewhat iridescent. Stalks black, slender, cylindrical. 

 Columella cylindrical, slender, truncate. Capillitium threads 

 colourless, branching in a fasciculate manner ; fascicles few. 

 Spores violet, delicately verruculose, 6*6 //, diam. 



Hab. Near Paris (Roze). 



This description applies to a form of L. irideum with pale 

 capillitium. 



10. L. nigrescens Sacc., in Mich., ii., p. 262 (non Host.) Sporan- 

 gia gregarious, stipitate, globose, not umbilicate, smooth, erect, at 

 first yellowish, then opaque black. Stalks filiform, 0'5 mm. high, 

 40 fji thick, black, with a small reddish hypothallus. Columella 

 cylindrical, reaching half the height of the sporangium, giving 

 rise at the obtuse apex to the radiating, dichotomously branching, 

 filiform, dusky threads of the capillitium. Spores dull violet, very 

 minutely echinulate, 9 to 10 /x, diam. L. Saccardianum Mass., 

 Mon., p. 101. 



Hab. On heaps of dead leaves and twigs. N. Italy. 



From the size of the spores it is probable that this is a minute form 

 of L. violaceum. 



11. L. Ellisiana Cooke, in Ann. Lye. Nat. Hist. N. York, xi., 

 p 397. Sporangia globose, stipitate, minutely rugulose, blackish- 



