512 LICH ENACEI. [ PHLYCTIs, 
or murali-divided. Spermogones with simple or slightly branched 
sterigmata, : 
Differs from the preceding subtribe in the apothecia being usually more 
open, and especially in the spores being murali-divided. It comprises 7 
Benera, four of which are entirely exotic, while Belonia Koerb., though 
European, does not occur in Britain. 
64. PHLYCTIS Wallr. Naturg. 
der Flecht. (1825) p. 527.—Thallus 
thinly crustaceous, continuous or 
pulverulent. Apothecia rotundato- 
difform, usually suffused, erumpent, 
the thalline margin irregularly 
dehiscent or indistinct; hypo- 
thecium colourless; spores large, 
1-2ne, ellipsoid or oblong, murali- 
divided, colourless; paraphyses 
slender ; hymenial gelatine scarcely 
tinged, but the thece bluish with 
iodine. Spermogones with simple 
sterigmata and short, slender, 
straight spermatia. Fig. 72. 
A small genus the plants belonging Pahiyctis agelea Koerb.—A. A 2- 
to which are, from the appearance of _ spored theca and paraphysis, x 
the fructification, readily overlooked. 250. B. ‘Two spores, x 350. 
In some respects it approaches Pertu- 
sarta, but is definitely separated by the muriform spores. Of the three 
European species two are found in this country, 
1. P, agelea Koerb. Syst. Lich. Germ. (1855) p. 391.—Thallus 
effuse or subdeterminate, thin, rugose or smoothish, often subleprose, 
white or greyish-white (K+ yellow, then deep-red). A/pothecia 
minute, blackish, white- or ceesio-suffused; spores 2ne (3—4n2%), 
ellipsoid, mucronate at the apices, 0,045-70 mm. long, 0,014-27 
mm. thick.—Mudd, Man. p. 279, t. 5. £. 118; Cromb. Lich. Brit. 
p. 61; Leight. Lich. Fl. p. 246, ed. 3, p. 237.—Thelotrema agelea 
Gray, Nat. Arr. i. p. 494 pro parte. Variolaria agelea Turn. & 
Borr. Lich. Brit. p. 78; Sm. Eng. Fl. v. p. 171. Lichen ageleus 
Ach. Prodr. (1798) p. 30; Eng. Bot. t. 1730. Variolaria con- 
stellata Tayl. in Mack. Fl. Hib. ii. p. 113 pro parte (ex specimine 
ab ipso).— Brit. Evs.: Leight. n. 282; Mudd, n. 269. 
Occasionally speads very extensively and then covers the lower portion 
of the trunks of trees. The apothecia, which are scattered or more 
frequently crowded, are at first entirely enclosed in thalline verruce: and 
at length leproso-coronate or almost covered by the thallus. The spermo- 
gones are very seldom visible in the British specimens. 
Hab. On trunks of trees in maritime and upland situations. Distr. 
General and common in England; scarce in S. Ireland; not seen from 
Scotland or the Channel Islands——B. M.: Ickworth, Suffolk; near 
Yarmouth, Norfolk; Epping Forest, Quendon, and Rickling, Essex ; 
Penshurst, Kent; Shiere, Surrey; Glynde and Hentield, Sussex ; Caris- 
fata 
\Nisfal 
