480 GRAPHIDINE [ROCCELLA 
the Clyde area, Scotland.—B. M. St. Brelade’s Bay, La Moye and 
Noirmont, Jersey; Petit-Pot Bay, Guernsey; Sark; St. Mary’s, 
Scilly Islands; The Lizard, Tintagel Castle, Lamorna, Pentire and 
St. Minver, Cornwall; Kingswear, Bolt Head, Ilfracombe, Lynmouth 
and Lynton, Devon; Portland Island, Dorset; Bembridge and 
Godshill Church, I. of Wight; Millport, Cumbrae Island, Firth of 
Clyde. 
Form tenuior A. L. Sm.—Thallus of longer slender fronds 
much branched at the apices.—R. phycopsis f. tenuior Nyl. ex 
Leight. Lich. Fl. ed. 3, p. 74 (1879) ; Cromb. Monogr. i. p. 183. 
R. fuciformis (errore) f. tenuior Cromb. in Grevillea xv. p. 47 
(1886). 
Differs in the long slender fronds, almost 10 em. high. Leighton, 
who first published this form, ascribed it to Larbalestier, by whom it 
was collected, but on the herbarium specimen Larbalestier has 
written f. tenwior Nylander, to whom it had evidently. been sub- 
mitted. . 
Hab. On rocks in a maritime situation —B. M. La Moye, Jersey. 
2. R. fuciformis DC. Fl. Fr. ii. p. 335 (1805).—Thallus of 
compressed short or long fronds narrow or wide, irregularly 
branched, frequently proliferate and more or less sorediate at 
the margins, the soredia solitary or in dense masses, glaucous- 
white or -brownish (CaCl surface and medulla —, soredia + rose- 
red, medulla I+blue). Apothecia not uncommon, discoid, promi- 
nent, rather small, scattered or crowded, the disc black, at first 
pruinose, the thalline margin irregular in outline, at length 
almost excluded ; paraphyses stoutish with brown tips, the whole 
hymenium deep brown in thick section ; spores oblong-fusiform, 
20-30 p long, 4-6 p thick.—S. F. Gray Nat. Arr. i. p. 426; 
Hook. in Sm. Engl. Fl. v. p. 222; Mudd Man. p. 76, t. 1, 
fig. 18; Cromb. Lich. Brit. p. 23 & Monogr. i. p. 183; Leight. 
Lich. Fl. p. 82; ed. 3, p. 74. Lichenotdesyfuciforme tinctorium, 
corniculis longioribus et acutioribus Dill. Hist. Muse. p. 168, 
tt. 22, 23, fig. 6la—-p (1741). Lichen fuciformis L. Sp. Pi. 
p- 1147 (1753); Dicks. Pl. Crypt. fase. iii. p. 17; With. Arr. 
ed. 3, iv. p. 51; Engl. Bot. t. 728. 
Exsicc. Cromb. nos. 15, 125; Larb. Cesar. n. 12 & Lich. Hb. 
n. 123; Leight. n. 171. 
Generally found growing with the previous species, but very 
distinct in form and attaining a much larger size up to 6 inches in 
length, with the ribbon-like fronds from less than a line to nearly 
half an inch in width. Only the soredia in this species are stained 
with chloride of lime, the outer cortex and medulla are unaffected. 
Hab. On rocks in maritime districts.—Distr. Local though fairly 
plentiful on the southern coasts; rare in §8.W. and W. Ireland.— 
B, M. St. Ouen’s Bay, St. Brelade’s Bay and St. Martin's, Jersey ; 
Guernsey; St. Mary’s, Scilly Islands; Logan Rocks, near Land’s 
End, Tintagel, The Lizard, Penzance and Lamorna Cove, Cornwall ; 
Bolt Head, Lynton and Ilfracombe, Devon. 
