131 363 
thallo immersa, Perithecium fuligineum, integrum, labiis patentibus. Di- 
scus apertus, concavus aut planus, tenuissime pruinosus lividusque aut 
nudus fuscescensque, margine proprio concolore, tenuissimo saepe cinctus. 
Sporae 8: nae, fuscescentes, septis 3, long. 13—17, crass. 0,005—0,006 mm. 
(loculis lenticularibus). 
Ad corticem Arecae catechu prope Stationem navalem Lem Dan in 
insula Koh Chang (no. X, XL, fig. 7). 
Area: In regionibus tropicis Americae, Africae et Asiae distributa. 
56. Gr. (sect. Platygramma) subtigrina Wain., Lich. Nov. Rar. IV 
(Hedwigia 1907), p. 177. 
Thallus tenuis, sat laevigatus, epiphloeodes, albidus, sat opacus aut 
leviter nitidus, KHO primum lutescens, dein rubescens. Pseudostromata 
haud distincta. Apothecia aggregata confluentiaque et vulgo radiato-ra- 
mosa, radiisque vulgo numerosis, circ. 0,2—0,15 mm. latis, flexuosis, 
acervulos 5—2 mm. latos formantia, partim circumscissa, thallo immersa. 
Perithecium tenuissimum, fuligineum, aut latere fuscescens basique _palli- 
dum, labiis patentibus. Discus apertus, concavus aut planus, tenuiter 
pruinosus lividusque, immarginatus aut margine thallino tenui circumscisso 
partim cinctus. Sporae 8: nae, fuscescentes, septis 3, long. 0,010—0,015, 
crass. 0,005—0,006 mm. 
Thallus jodo passim leviter violascens, haud bene reagens, hypo- 
thallus indistinctus. Hymenium circ. 0,080 mm. crassum, haud oleosum. 
Epithecium fuscescens. Paraphyses simplices. Asci cylindrico-clavati, 
membrana tenui, apice leviter incrassata. Sporae distichae, ellipsoideae, 
apicibus rotundatis aut obtusis, loculis lenticularibus. — Graphis tricosula 
(Nyl.) Wain. (Glyphis Nyl. apud Cromb., Lich. Ins. Rodrigu., Journ. of 
Bot. 1877, p. 444) secund. specim. orig. (no. 7130 in herb. Nyl.) thallo 
albido, tenuissimo, KHO lutescente deindeque fulvescente (nec rubescente) 
et ramis paucis apotheciorum a planta nostra differt. Gr. tricosa Ach. 
(Wain., Etud. Lich. Brés. I, p. 116) praesertim thallo glaucescente, tantum 
ad apothecia KHO reagente ab ea recedit. 
Ad corticem Arecae catechu prope Stationem navalem Lem Dan in 
insula Koh Chang (no. XXI). 
57. Gr. (sect. Platygramma) labyrinthica (Ach.) Wain., Catal. Welw. 
Afr. Pl. II, P. Il (1901), p. 439. Glyphis Ach., Syn. Lich. (1814), p. 107; 
Nyl., Enum. Gén. Lich. (1857), p. 134; Hue, Lich. Exot. (1892) p. 271 
et 322. Sarcographa Mill. Arg., Graph. Féean. (1887), p. 62, Lich. 
Beitr. (FI. 1887), no. 1100 et 1102. 
Thallus tenuis, laevigatus, epiphloeodes, leviter nitidus, glaucescens 
vel stramineo-glaucescens, KHO leviter rubescens. Pseudostromata di- 
stincta, elevata, applanata, lateribus sensim dilatatis, extus alba, opaca, 
KHO primum lutescentia, dein leviter rubescentia. Apothecia in pseudo- 
stromatibus crebre aggregata confluentiaque et seriata, humida rotundata 
aut parcius etiam oblonga, sicca angulosa difformiaque et saepe fissuris 
separata circumscissaque, long. circ. 0,1—0,3, latit. circ. 0,1 mm. Peri- 
thecia fusco-fuliginea, integra, basi crassiora, partim confluentia. Discus 
