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241
ambitii tenuiter longeque sæpe radians, areolatus albus sufTusus
(pulviscuüs subtilibus fere areolatis); apothecia pauxillum vel
vix albo-su ffusa mediocria marginata, intus hypothecio fusco;
sporæ satis parvæ ellipsoideæ, longit. 0,oi2 millim., crassit.
0,oo6 millim. Gelatina hymenea iodo cærulescens.
Ad saxa gneissacea insularum Alandiæ. Vix nisi varietas
insignis Lecideæ contiguæ.
18. Lecidea contigüa var. notabilis Nyl. — Thallus
in-æqualiter minute granulosus fere leprosus passim acervulatus
(faciei fere ut in Stereocaulo condensato); apothecia sat magna
(sæpe låtit 2 millim.) prominula planiuscula opaca (trachylioidea),
margine parum vel vix distincto; sporæ mediocres ellipsoideæ.
Ad saxa granitica. Forte species distincta.
19. Lecidea alboatba var. epipoua (Ach.) ad muros.
Si-mul var. ambigua (Ach., margaritaeea Flot, son Ach.) ad saxa
gneissacea.
20. L. lentocularis Ach. (chalybeia Borr.). — Supra saxa
gneissacea thallo tenui umbrino continuo indeterminato.
21. Opegrapha varia Pers. *) formæ signata (Acb.) et
jmlicaris (Ach.). Occurrit simul ad muros ruinarum arcis
Raseborg in Nylandia forma saxicola, cui interdum epithecium
expla-natum et nonnihil rariiis flavo-suffusum; sporæ
oblongo-ftisifor-mes 5-septatæ, longit. circa 0,o22 millim., crassit. 0,oo6 millim.
22. 0. RiMALis Ach. — Ad fraxinos. Simul in Alandia
0. alra Pers. et vulgata Ach.; hæc quoque varietatibus siderella
*) 0. gregorio Acb. L. U. p. 252, hue relata, nihil aliud sistit quam
Dichænam rugosam fagineam dispersait!. Animadvertam simul, O.calcaream
Ach. L. ü. p. 250, Syn. p. 72, pertinero ad 0. atram Pers., Nyl. Prodr. p.
157 (Chevalieri Leight.), ex specimine anglico Turneri in hb. Ach. In Nyl.
Prodr. 1. c. relata fuit ad 0. saxatüem DC. æque ac 0. saxioota Ach. Syn.
p. 71, quæ (ex hb. Ach.) non diflfert ab 0. rvpestri Pers. (0. Persoomi var.
aporea Ach. hb. quoad specimen sueeicum).
14
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