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 muscorum Lev. from New Granada 
(B. ivi. 1023) is a form of L. irideum with scattered sporangia on 
setaceous stalks, and dark capillitium ; the spores measure 8 to 9 /a, 
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 Eost., Versuch, p. 7 (1873). Plasmodium 
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. 
diam., violet or iDronze 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. Columella 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 diam. — 
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 violacea Fr., Syst. Myc, iii., p. 162 (1829). 
Siemonitis arcyrioides Somm., in Mag. Nat., vii., p. 298 (1827). 
Lamjn-oderma arcyrioides Eost., Mon., p. 206 ; Blytt, ^.c, p. 8 ; 
Cooko, Myx. Brit., p. 50; Mass., Mon., p. 102. Stemonitis Carestiai 
Ces. & de Not., Erb. Grit. Ital., No. 888. Lamprodet 'ma Sauteri 
Eost., Mon., p. 205 ; Mass., Mon., p. 100. Lamx)roderma rohusia 
Ellis & Everh., in Mass., Mon., p. 99. Tihnadoche Berkeleyi 
Mass., Mon., p. 332. 
a. genuimim: sporangia globose, flattened beneath; stalk 
slender ; capillitium nearly colourless, sometimes brown, flaccid ; 
spores 8 to 10 /X diam., minutely spinulose. 
p. Sauteri : sporangia globose or subovoid ; thickened below ; 
capilhtium brown; spores 11 to 15 /x diam., nearly smooth or 
spinose. 
9 
