BRITISH LICHENS

268 GRAPIDDINEAll OPEGRAPHA
The specimen in the Crombie herbarium was collected at Holmwood.
Surrey.
Hub. On old oaks.-Dislr. Rather rare in the Channel Islands and
England.-B. ]rIo Brockenhurst, New Forest, Hants; near Glynde.
Danny, Hurstpierpoint, Parham Park, Sussex; Holmwood and
Shere, Surrey; Thorndon Hall, Gosfield Hall, and Epping Forest,
Hamault Forest, Essex; Penshurst, Kent; Windsor Forest, Berks;
Ickworth Park and Dennington Park, Suffolk; Sherwood Forest,
Nottinghamshlre; Purton, Wiltshire; Packington Park, Warwickshire;
Donnington Park, Leicestershlro; Haughmolld Hill, Shropshire;
Hoggarts Wood, Ingleby, Cleveland, Yorkshire.
24. O. prosodea Ach. Meth. 22 (1803}.-Thallus effuse,
thickish, membranaceous, dull-pallid-brownish. Apothecia
prominent, stout, subcylindrical, somewhat shining, straIght;
disc narrow; margins elevated, connivent; paraphyses distinct;
spores elongate-fusiform, colourless, up to 17 -septate, about
50-60 (J. or more long, 6 (J. thick; spermogones rod-shaped 5-6 (J.
long, ·7 (J. thick.-NyI. in Prodr. FI. N. Gran. 568; Cromb. Lich.
Brit. 99; Leight. Lich. FI. 387; ed. 3, 410.
Exsicc. Larb. Cresar. n. 92.
Hub. On bark of trees.-Distr. Rare in Chann('l Islands and S.
England.-B. M. Ann Port and St. Peter's Valley, Jersey; near
Penzance, Cornwall; Newton Bushell, Devon; New Forest, Hants;
Shere, Surroy.
25. O. viridis Pers. ex Ach. Meth. 22 (1803}.-Thallus paleyellowish
or brownish, thin, somewhat vaguely limited. Apothecia
innate or sessile, oblong or linear, rounded, straight or
curved mostly simple; disc narrow, uniform, the margins rounded,
inflexed; spores elongate-acicular or narrowly fusiform, up to
15-septate, colourless, 40-80 (J. long, 6-7 f1. thick; spermogones
with arcuate spermatia 14-16 (J. long, 5 (J. thick.-Carroll in
Journ. Bot. vi. 100 (1868); Cromb. Lich. Brit. 100; Leight.
Lich. Fl. 387; cd. 3, 410. O. siderella Leight. in Ann. Mag. Nat.
Rist. ser. 2, xiii. 209, t. 6, f. 14 (1854) (non Ach.1). O. rubella
Mudd Man. 233"t. 4, f. 90 (1861) (non Pers.1).
Exsicc. Mudd n. 213 (as O. rubella).
Distinguished from the preceding by the thinner thallus and tho
smaller and more slender apothecia.
Hab. On the bark of trees.-Dtstr. Rare in the Channel Islands,
England, Wales and Ireland.-B. M. Near St. Martin's Church,
Jersey; near Penzance, Cornwall; Ullacombe, near Bovey Tracey,
Devon; near Stoney Cross, New Forest, Hants; near Glynde, Sussex;
Shere, Surrey; Epping Forest, Essex; Dolgelly, Merioneth; Trefriw,
Carnarvon; Hoggart's Wood, Ingle by, Cleveland, Yorkshire; Castle
Bernard Park, Cork; Tore Mt. and Dmlsh, Killarney.
Form taxicola Cromb. Lich. Brit. 100 (1870}.-Differs from
the species in the slightly pulverulcnt thallus and in the more