PARMELIELLA | PANNARIACEA 81 
28. PARMELIELLA Miill.-Arg. in Mém. Soc. Phys. Hist. 
. Nat. Genéve xvi. p. 376 (1862). Pannularia Nyl. in Flora Ixii. 
p- 360 (1879) pro parte; Cromb. Monogr. i. p. 340 pro parte. 
Coccocarpia Nyl. Syn. ii. p. 41 (1885) pro parte (non Pers.) ; 
Cromb. Monogr. i. p. 345. Pannaria Mudd Man. p. 121 (1861) 
pro parte. (Pl, 28.) 
Thallus squamulose or almost foliose, corticate, with hypo- 
thallus and rhizine. Algal cells Nostoc. Apothecia without a 
thalline margin, sessile, small ; spores 8 in the ascus, elongate or 
ellipsoid, simple, rarely 1-septate, colourless. 
Distinguished from other genera of the Order by the small apo- 
thecia without a thalline margin. 
1. P. corallinoides A. Zahlbr. in Ann. K. K. Naturhist. 
Hofmus. Wien xiii. p. 462 (1899).—Thallus minutely granular, 
thinly coralloid-squamulose, brownish-green or leaden-grey, the 
hypothallus bluish-black or blackish. Apothecia small, plane or 
convex, brown or reddish-brown, usually paler at the margin, 
internally brownish-black ; paraphyses slender, sparsely septate ; 
spores ellipsoid, simple, 12-19 » long, 6-8 pw thick ; hymenial 
gelatine intensely blue with iodine.—Stereocaulon corallinoides 
Hoffm. Deutschl. Fl. ii. p. 129 (1795) fide Wainio in Medd. Soe. 
Faun. & Fl. Fenn. xiv. p. 23 (1888). Lichen microphyllus Sm. Engl. 
Bot. t. 2128 (1810) (non Swartz). Lecidea microphylla Hook. 
Fl. Scot. ii. p. 41 (1821) (Ach.?). Lepidoma triptophyllum 8. F. 
Gray Nat. Arr. i. p. 462 (1821). Placodium microphyllum Hook. 
in Sm. Engl. Fl. y. p. 198 (1833). Parmelia plumbea var. 
microphylla Tayl. in Mackay Fl. Hib. ii. p. 142 (1833). Pannaria 
triptophylla Nyl. in Act. Soc. Linn. Bord. sér. 3, i. p. 313 (1856) 
pro parte ; Mudd Man. p. 123; Leight. Lich. Fl. p. 167 ; ed. 3, 
p. 152; Cromb. Lich. Brit. p. 42. Pannularia triptophylla Stiz. 
Lich. Helv. p. 82 (1882) ; Cromb. in Grevillea xviii. p. 44 (1889) 
& Monogr. i. p. 341. 
Ezxsicc. Cromb. n. 153. 
Differs from P. microphylla in the less developed thallus and the 
darker hypothecium on which the squamules are adnate and plane, 
becoming broken up into granules later. It varies in colour according 
to situation, and may be almost black (f. nzgricans Leight. Lich. I'l. 
ed. 3, p. 153). It is rarely fertile in the British Isles. 
Hab. On the trunks of old trees in wooded districts. — Distr. Some- 
what local, though plentiful where it occurs in the hilly or mountainous 
regions of Great Britain and Ireland.—B. M. St. Breock, Cornwall ; 
near Lydford, Hustyn’s Wood and Lyn, Devon; Dolgelly, Barmouth, 
Cwm-Bychan and Harlech, Merioneth; Beddgelert, Carnarvon ; Kent- 
mere, Westmoreland; New Galloway, Kirkcudbrightshire ; Inverary, 
Barealdine and Appin, Argyll; Crianlarich, Loch Katrine and Glen 
Lochay, Perthshire; Craig Cluny, Braemar, Aberdeenshire; Moidart, 
Invernessshire ; Glen Ach-na-Shilloch, Rossshire; Glen Bower Woods 
and Glengariff, Cork; Tore Mt. and Dinish, Killarney, Kerry. 
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