BRITISH LICHENS

166 CYCLOCARPINEJE BACIDIA
Leighton (1. c.) records f. 'chlorotica on Thymus, Ulex, Oalluna,
and Ulmus. According to Zahlbruckner, .Pyrenothea furcella, which is
occasionally present, is the spermogonial form, with spermatia 6·5 f.t
long, 1·5-2 (J. thick. .
Hab. On trunks of trees, birch, ash, maple, etc., also on leather, in
maritime and upland wooded situations.-Distr. Not uncommon in England
and S. and W. Ireland, rare in S. Wales and the Channel Islands, not
recorded from Scotland.-B. M. St. Ann Port, Jersey; Newlyn Cliff,
Penzance, Cornwall; Shanklin, I. of Wight; near Bovey Tracey,
Devon; New Forest, Hants; Glynde, Sussex; Maidstone, Kent;
Ultmg and Gosfield Hall, Essex; WImp ole Park and near Newmarket,
CambridgeshIre; near Brandon, Suffolk; Deerhurst, GloucestorshIre;
near Worcester; Charnwood Forest, Leicestershrre; Fort
HIll, FIshguard, Pem brokeshire ; near Yarm, Cleveland, Yorkshire;
Leven's Park, Westmorland; Dunscombe's Wood, Cork; Tervoe and
Castleconnel, Limerick; Dinish, Killarney, Kerry.
7. B. fuscorubella Am. in Flora liv. 55 (1871).-Thallus
effuse, thin, dark-grey or whitish. Apothecia brown (containing
Bacidia-brown), sessile or adnate, large, at first plane and thinly
margined, then convex and immarginate; hypothecium brownishyellow
(K + carmine-red); paraphyses slender, loosely coherent,
yellowish at the apices; spores straight, rather stout, attenuate
towards the base, 4-16-septate, 60-75 f.t long, 3-5 f.t thick;
hymenial gelatme deep-purple-violet with iodine.-Verrucarw
fuscorubella Roffm. Deutschl. Fl. ii. 175 (1795). Lecidea fuscorubella
Cromb. in Grevillea xxii. 58 (1893).
A rare lichen. Arnold gives as the chief distinction between it
and allied lichens the reaction of the hypothecium with potash, probably
indicating the presence of parietin.
Hab. On the bark of trees.-Dist. Rare in S. and Central England.
--B. M. Near Stoney Cross, New Forest, Hants; Malvern. Worcestershire.
8. B. herb arum Am. in Flora xlviii. 596 (1865).-Thallus
effuse, very thin, granulose, greyish-white (K - , CaCI-), often
obsolete. ApotheCla moderate in size, sessile, at first promment
and almost closed, with a shining margin, at length convex and
immarginate, reddish or 'dark-red; hypothecium brownish- or
reddish-yellow; paraphyses coherent, slightly clavate at the
apices; epithecium colourless; spores acicular, straight or somewhat
flexuose, narrower at the apICes, 3-5- or usually 5-7-septate,
38-56 f.t long, 1-2 f.t thick; hymenial gelatine blue then sordidwine-red
with iodine.-Secoltga herbarum Stiz. in Acad. Cres.­
Leop. Nov. AC,t. xxx. 3, 46 (1863). Lectdea herbarum Cromb. in
Joum. Bot. xii. 148 (1874); Leight. Lich. Fl. ed. 3, 372.
Ilzsicc. Larb. Lich. Rb. n. 350.
Stizenberger considered this plant to be intermediate between
B. effusa or B. fuscorubella and B. muscorum, agreemg with the
latter ill habitat and colour of the older apothecia, but approaching