HETERODERMACEiE. 
137 
LINDBLADIA.] 
Sporangia stalked; sporangium-waU with tluckenings in tlie form 
of a delicate persistent net expanded at the nodes. 
(23) Cribraeia. 
Fig. 3l.— Crihraria aurantiaca Schrad. 
a. Group of sporangia. Twice natural size. 
b. Sporangium after dispersion of the spores. Mag- 
nified 20 times. 
Sporangia stalked; sporangium- wall with thickenings in the form 
of nearly parallel ribs extending from the base to the apex, 
connected by delicate threads. 
(24) DiCTYDIUM. 
Fig. 32. — Bictyclium nmbilicatum Schrad. 
a. Group of sporangia. Twice natural size. 
i. Sporangium after the dispersion of spores. Mag- 
nified 20 times. 
Fig. 32. 
Genus 22.— LINDBLADIA Fries, Summa Veg. Scand., p. 449 
(1849). Sporangia minute, either combined to form an sethalium, 
or closely compacted ; rarely free, sessile, or stalked ; sporangium - 
wall membranous, unifoim, beset with microscopic, dark, plas- 
modic granules. 
1. L. Tubulina Fries, I.e. (1849). Plasmodium? Sporangia 
minute, combined to form a more or less complex, effused or 
pulvinate sethalium, 1 to 10 mm. thick, black with a cortex of 
imperfectly developed spores, or umber-brown with the surface 
formed by the membranous walls of the convex summits of the 
component sporangia ; hypothallu.s strongly developed, of mem- 
branous, more or less spongy tissue ; sometimes the sporangia are 
shortly cylindrical and closely compacted, sessile, 0"3 to 0'5 mm. 
broad; in rare instances they are free and shortly stalked; 
sporangium- wall membranous, yellow-brown, uniform, beset with 
scattered clusters of dark, round, plasmodic granules, 1 fx diam. 
Stalk, when present, short, dark brown, rugose. Spores och- 
raceons-brown, faintly warted, 4 to 6 /u, diam. — Licea effusa Ehr., 
Sylv. Myc. Berol., p. 26 (1818). Lindbladia efusa Rest., Mon,, 
p. 223 (1875); Cooke, Myx. Brit., p. 55; Macbride, in BwW. Nat. 
Hist. Iowa, ii., p. 115 ; Rex, in Bot. Gaz., xvii., p. 201. Tubulina 
