r 



LAMPRODERMA.] STEMONITACE/E. 129 



Monograph, p. 95, and described as having smooth spores measuring 

 11 to 16 /x, which is misleading. Specimens received from the United 

 States, representing several gatherings, agree in all respects with the 

 type. The type of Enerthenema musconnn Lev. from New Granada 

 (B. M. 1023) is a form of L. irideum with scattered sporangia on 

 setaceous stalks, and dark capillitium ; the spores measure 8 to 9 p, 

 and are marked with 20 to 24 strong warts on the surface of the 

 hemisphere, not including those seen on the margin. The warting is 

 unusually pronounced, but in all other respects the specimen corre- 

 sponds with frequent English gatherings. 



Hab. On dead leaves. Common. Lyme Regis, Dorset (L:B.M.91) ; 

 Batheaston, Somerset (B. M. 194, 201) ; Highgate, London (B. M. 1111) ; 

 France (B. M. 617) ; Poland (Strassb. Herb.) ; Ceylon (K. 1634) ; 

 Philadelphia (L:B.M.98) ; Ohio (L:B.M.98) ; Iowa (B. M. 1000) ; S. 

 Carolina (B. M. 846) ; New Granada (B. M. 1032). 



5. L. violaceum Host., Versuch, p. 7 (1873). Plasmoclium 

 watery-white. Total height 0*6 to 1*5 mm. Sporangia sub- 

 globose, more or less flattened and umbilicate beneath, or shortly 

 ellipsoid, stipitate, erect, scattered or aggregated, 0*4 to 0'9 mm. 

 cliam., violet or bronze with iridescent reflections; sporangium- 

 wall membranous, somewhat persistent, pale violet-brown. Stalk 

 varying from very short to one and a half times the height of 

 the sporangium, black, rising from a red-brown membranous 

 hypothallus. Coluniella one-third to two-thirds the height of 

 the sporangium, cylindrical, obtuse, or sometimes narrowing to 

 the apex. Capillitium of almost colourless, pale brown or dark 

 violet-brown threads, springing from the upper part of the 

 columella; in the pale form branching and anastomosing in a 

 flaccid network, becoming very slender towards the surface, vary- 

 ing in density in the same group of sporangia ; in the dark form 

 the threads are either lax, or coarse and rigid, or flexuose and 

 forming a close network. Spores purplish-grey or purple-brown, 

 nearly smooth or minutely or strongly spinulose, 8 to 15/udiam. 

 In Fuckel, Symb. Nachtr., p. 69 ; Mon., p. 204 ; Cooke, Myx, Brit., 

 p. 50; Blytt, Bidr. K. Norg., Sop. iii. (1892), p. 8; Mass., Mon., 

 p. 94. Stemonitis violated Fr., Syst. Myc., iii., p. 162 (1829). 

 Stemonitis arcyrioides Somm., in Mag. Nat., vii., p. 298 (1827). 

 Lamproderma arcyrioides Host., Mon., p. 206 ; Blytt, I.e., p. 8 ; 

 Cooke, Myx. Brit., p. 50; Mass., Mon., p. 102. /Stemonitis Carestice 

 Ces. & de Not., Erb. Crit. Ital., No. 888. Lanwrod&rma Banter i 

 Host., Mon., p. 205 ; Mass., Mon., p. 100. Lamproderma robusta 

 Ellis & Everh., in Mass., Mon., p. 99. Tilmadoche Berkeleyi 

 Mass., Mon., p. 332. 



a. gen.uin.um : sporangia globose, flattened beneath ; stalk 

 slender ; capillitium nearly colourless, sometimes brown, flaccid ; 

 spores 8 to 10 /x diam., minutely spinulose. 



/3. Sauteri : sporangia globose or subovoid ; thickened below ; 

 capillitium brown ; spores 11 to 15 ^ diana., nearly smooth or 

 spinose. 



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