SYNALISSA. ] COLLEMEI. 37 
lular. Apothecia terminal, innate, lecanorino-endocarpoid, conco- 
lorous; spores ellipsoid or ovoid, ‘ 
usually 8ne, occasionally nu- 
merous, simple, colourless ; hy- 
menial gelatine variously tinged 
with iodine. Spermogones ter- 
minal or subterminal, with 
simplish sterigmata and oblong 
spermatia. 
Distinguished from Ompha-. 
laria, which ddées not occur in our 
islands, chiefly by the gonimic 
granules; these are in pairs 
between the thalline filaments or 
affixed to their branchlets. Only 
two species occur with us, rarely, 
and generally in poor condition. 
1. S. symphorea Nyl. Syn. 
i. (1858) p. 94, t. 3. f. 2.— 
Thallus fruticulose, fastigiately 
divided, opaque,black ; branches 
short, rounded, erect, obtuse at 
the apices, sometimes only no- 
dulose. Apothecia minute, 
punctiformi - impressed, at Fig. 8. 
length dilated, subconcolorous, Synalissa symphorea Nyl.—a. Section of 
the thalline margin tumid ; thallus with an apothecium, x 30. 
; fig Pao b. Section of a spermogone, x 30. 
spores 8-2dne, ellipsoid or ec. Syngonimia between the filaments, 
spherical, 0,009-11 ms long, x 350. d. Gonimia affixed to a race- 
0,006-7 mm. thick; hymenial —mosely divided filament, x 350. ¢. Spo- 
gelatine not tinged with iodine. riferous theca with three paraphyses, 
—Mudd, Man. p. 35, t. 1. tee Jf. Four spores, X 500.° g. 
f,2; Cromb. Lich. Brit. p.3; _Wrismata and spermatia, x 000. 
Leight. Lich. Fl. p. 16, ed. 3, p. 18.—Synalissa vulgaris Thwaites, 
Ann. Mag. Nat. Hist. 1849, iii. p. 219. Collema symphureum DC. FI. 
Fr. ii. (1805) p. 882, C. synalissa Ach., Tayl. in Mack. Fl. Hib. ii. 
p. 108. 
The thallus in our specimens is generally only noduliform. Elsewhere 
it often occurs amongst the squamules of ZLecidea lurida, and further 
research may discover it in Britain also similarly associated. A reference 
to fig. 8 will show the peculiar arrangement of the gonimia affixed to 
the branchlets of the filaments. The apothecia are very rare in Great 
Britain, and the spermogones are only seldom seen, with spermatia 
0,008 mm. long, 0,001 mm. thick. 
Hab. On calcareous rocks in maritime and upland districts.—Distr. 
Local and rare, having with certainty been gathered only very sparingly 
in 8.W. England, and in the 8.W. Highlands, Scotland; the Teh plant 
being very doubttul—B. M.: Portland island, Dorsetshire; Anstey’s 
Cove, Torquay, Devonshire ; St. Vincent’s rocks, Gloucestershire. Bar- 
caldine, Argyleshire. 
\ 
‘ 
