LICHENES EXTRA-EUROPÆI. 215 
fahlunensis Ach., Tuck. Lich. Americ. septentr. eæsice., n. 106; eadem, & vulgaris a major 
Schær. Lich. Helvet. exsicc. n. 373 et b minor ejusdem n. 374; Imbricaria fahlunensis D. C., 
Hepp Ælecht. Europ.n.586(tres posteriores numeri in herbario meo); Platysma fahlunense 
Nyl. apud Hue Zich. exot. n. 547; non Lichen fahlunensis L. quod ad Platysma commixtum 
refertur a cl. Wain. loc. cilato et conf. eliam Th, Fr. Lichenogr. scand., p.109 (inde hujus 
Pl, commixti Nyl. nomen verum et magis antiquum est //, fahlunense Wain). 
In America : in montibus Albis saxicolam legit Lesquereux, n. 222. 
Thaïllus spadiceo-fuscus, passim nigricans, suborbicularis, plagas 3-5 cent. latas for- 
mans, membranaceus, decumbens, opacus et in partibus junioribus nitidus, K supra non 
mutalus et intus flavens ; laciniæ 1-3,5 mm. lalæ, varie ramosæ et imbricalæ; supra 
læves, vulgo applanatæ, passim concavæ ; intus subflaventes ; subtus nigræ, lævigalæ et 
paucis rhizinis nigris substralo affixæ alque in margine seu marginem versus eisdem 
rhizinis non fulcrantibus ornalæ. Cortex superior 20-95 LH latus, albidus et in zona supera 
et angusla nigricans, primo aspectu pseudoparenchymalicus cum cellulis Ilumine 2-3 y 
lato et testaceo ; sed illius hyphæ superficiei perpendiculares et constricte seplatæ in 
hyÿdrale kalico immersæ et dein ope colorantis gallice bleu colon dicli et aquæ immixti, 
cellulas pariete incrassalo nune simplices, nunc breviler ramosas, sive in basi corlicis, 
sive in ejus parle supera præbent. Gonidia 9-12 y lala in strato conlinuo parum crasso sub 
corlice vigentia. In meaulla satis densa hyphæ 4-6 y crassæ. Cortex inferior 16-184 lalus, 
nigricans et cellulas in medio albidas offerens. Apothecia 3-10 mm. lala, supra lacinias 
sessilia, primum eupuliformia et demum applanala, excipulo et margine grosse tubercu- 
lato, tubereulis subsorediosis et in margine apothecii optime evoluli evanidis atque disco 
spadiceo-nigricante ornata. Corlex excipuli 50 y latus, albidus et in parte externa nigri- 
cans, ex hyphis verticalibus constricte septatis irregulariter ramosis atque primo intuitu 
pseudoparenchymalicus, sed re vera ex hyphis rete maculis valde imparibus, lumine 
magno formantibus, constans; gonidia sub hypothecio ; medulla subflavens in qua hyphæ, 
6-8 L crassæ, laxe implexæ ; epitheciumnigrescenti-rufum ; hypothecium albidum e duplici 
hypharum zona constitulum : in superiore hyphæ horizontales, in inferiore autem latiore, 
hyphæ verlicales septatæque ; paraphyses 60 s altæ, 2 » crassæ, articulalæ atque apice 
nigrescentes et incrassalæ, 5-6  metientes; thecæ 34-36 u longæ et 12-15 p lalæ, mem- 
brana apicali paulum incrassala ; sporæ 8, simplicas, ellipsoideæ, 7-10 y longæ et 5-7 & 
latæ. Gelatina hymenialis iodo cœrulescens. Spermogonia globosa, nigra et in ipsa 
mMmarginis crassitudinis nala, spermalia utroque apice leviter incrassata, 5 y longa et lu 
lala ; sterigmala articulata. In Lauder Lindsay Mem. on the spermog. lab. XIII, fig. 4-7, 
Sterigmata recla et cylindrica sunt delinealta. 
Viget in Asia boreali (freto Behringii, et ibi eliam lectum a CI. Wright ex Le: b. of the U.S. North 
Pacific. explor. exped. under comm. Ringgold and Rodgers, annis 1853-56); in America boreali, 
Cetraria fahlunensis Schær., Tuck. Synops. North Americ. Lich., I, p. 33); in Europa. A cel. Müll. 
Arg. indicatur insuper in Japonia, Lich. Migosh. p. 122. 
328. Platysma pachyspermum Hue. 
In Asia: in China, prov. Yun-nan corlicolam legit R. P. Delavay in silvis Yen-lze-hay, 
17 junii 1887, et Lopin-chan, altit. 3200 m., 31 julii 1888. 
Thallus pallide flavens et aliquando denigralus, parlim procumbens et partim 
ascendens ; sat anguste laciniatus, tenuis, opacus, K supra flavior, inlus non mutatus, sed 
CaCI rubens ; laciniæ primariæ 5-10 mm. lalæ, dendroideo-ramosæ, ramis 2-3 mm. lalis, 
marginibus crenalæ aut breviter lacinulatæ, angusle denigratæ (in laciniis flaventibus) 
atque ascendentes, lacinulis etiam ambitu crenalis et non raro ereclis; supra læves aut 
paulum rugosæ atque subcanaliculatæ ; intus albæ ; subtus pallide flaventes, aut brunneæ 
vel nigrescentes, passim læves, passim reliculatim rugosæ, sæpe tuberculis 0,2-0,5 mm. 
