186 
ENDOSPOREiE. 
[arcyria. 
This species is represented by two gatherings from California by 
Dr. Harkness (K. 839, 897) ; in one the sporangia and capillitium are 
bright yellow, in the other dull yellow ; they received respectively the 
names A. vitelUna Phill. and A. versicolor PhilL, but as they agree in 
other respects they are united under the latter name. A. versicolor is 
closely allied to A . ferruginea, from the pale form of which it only 
differs in shape, in the papillose thickenings of the sporangium- wall, 
and the smoother spores. 
Hab. On dead wood.— California (L:B.M.154). 
3. A. albida Pers., in Romer, N. Mag. Bot., i., p. 90 (1794). 
Plasmodium grey, in rotten wood. Total height 0'8 to 4 mm. 
Sporangia ovoid, more ra.rely globose or cylindrical, stipitate, 
erect, 0*5 to 1*2 mm. diam., pale grey or greyish flesh-colour, 
sometimes dull yellow ; cup of the sporangium-wall membranous, 
smooth or minutely papillose, plaited at the base, pale grey or 
yellowish. Stalk cylindrical, furrowed, 0*2 to 2 mm. long, 0-05 
to 0"15 mm. thick, dark grey or brown, hollow, filled with spore- 
like cells. Capillitium a close network of grey or yellowish-gi-ey 
threads ; the outer threads 2 /a, rarely 4 yu, thick, closely warted 
or spinulose, those composing the inner part of the network 
4 to 6 /X thick, smooth or minutely warted, with numerous at- 
tachments to the cnp. Spores marked with a few scattered 
warts, 6 to 7 /A diam. — Trichia cinerea Bull., Champ., p. 120 
(1791). Stemonitis cinerea Gmel., Syst. Nat., p. 1467. Arcyria 
cinerea Pers., Syn. Fung., p. 184 (1801) ; Schum,, En. PI. SaelL, 
ii., p. 213 (1803); Eost., Mon., p. 272; Cooke, Myx. Brit., 
p. 71, figs. 182, 183, 184, 185, 193; Blytt, Bidr. K. Norg., 
Sop. iii. (1892), p. 11 ; Macbride, in Bull. Nat. Hist. Iowa, ii., 
p. 123; Mass., Mon., p. 151. Arcyria striata Rost., Mon., App., 
p. 36. Arcyria pom-^ormis Rost., Mon., p. 271 ; Cooke, Myx. 
Brit., p. 70. Arcyria Friesii Berk. & Br., in Ann. Mag. Nat. 
Hist., Ser. 4, xvii., p. 140; Cooke, Myx. Brit., p. 71, fig. 259. 
Stemonitis digitata Schwein., Trans. Am. Phil. Soc, New Ser. 4, 
p. 260. Arcyria digitata Rost., Mon., p. 274 ; Mass., Mon., p. 153. 
Arcyria glohosa Schwein., in Comm. Soc. Nat. Cur. Lips., i., 
p. 66. Lachnoholus glohosus Rost., Mon., p. 283 ; Mass., Mon., 
p. 137. Arcyria Cookei Mass., Mon., p. 154. 
a. genuina ; sporangia ovoid, grey. 
pomiformis : sporangia globose, yellow. — A. pomiformis 
Rost. 
y. glofeosa : sporangia globose, white or pale ochraceous. — 
Lachnoholus glohosus Rost. 
Plate LXVII., B.— a, b. sporangia, x 20 ; o, globose sporangium on 
bramble, x 20 ; d, d'. outer capillitium of a, often with half-rings and 
coarse spines on one side, d x 280, d' x 600 ; e, e'. outer capillitium of the 
more usual form, with minute spines equally distributed ; and smooth threa<;l 
attached to sporangium- wall, e x 280, e' x 600 ; /. spore, x GOO (England) ; 
ff. sporangium of Lachnoholus glohosus Rost., on chestnut bur, x 20 ; /(. 
capilUtium of same, x 600 (United States) ; i. sporangium of Lachnoholus 
glohosus var. mmor EUiS; on male flower of chestnut, x 20 (United States). 
