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2311
II. Crusta albida, cinerea v. plus minusve obscurata (rarius oxy-
data, ferruginea).
1. Spore dyblaste (tetrablastis rarissime immixtis).
A. Spore mature obscurate.
a. Crusta KOH haud sanguineo-rubescens. Thecium KOH super-
ne vulgo roseo-violascens.
«. Thallus verrucosus v. rimoso-areolatus, areolis planis v. con-
vexulis, concoloribus.
ee. Thecium superne plus minusve distincte violaceum v. pur-
pureum, KOH roseo-violascens. Spore (27—)30—35(—40) u longe,
(11—)13—16(—19) u crassz.
5. Rh. badioatrum (Floerke) Th. Fr.
88. Thecium superne smaragdulo- v. fuligineo-nigricans, KOH
haud reagens. Spore (21—)25—30(—34) u longe, (11—)13—15
(—16) u crasse.
6. Rh. jemtlandicum Malme.
8. Thallus ex areolis formatus discretis, suborbicularibus, pla-
niusculis v. concavis, margine vulgo pallidioribus. Thecium KOH
superne purpureo-violascens. Spore (20—)22—28(—30) u long»
(11—)12—14(—16) u crasse.
7. Rh. rittokense (Hellb.) Th. Fr.
b. Crusta albida v. cinerea, KOH sanguineo-rubescens. Thecium
superne smaragdulo- v. olivaceo-nigricans, KOH haud reagens.
Spore (18—)20—25(—27) u longe, (9—)10—12(—13) u crasse.
8. Rh. Copelandii (Koerb.) Th. Fr.
B. Spore etiam mature hyaline (tantum morbos: obscurascentes).
a. Hyphe medullares J coerulescentes. Thecium superne viola-
ceo-nigricans, KOH roseo-violascens. Paraphyses apice haud cla-
yato-incrassate. Spore (19—)22—26(—30) u longe, 8—11(—12) u
crasse.
9. Rh. polycarpum (Hepp) Th. Fr.
b. Hyphe medullares J haud coerulescentes. Thecium superne
smaragdulo- y. olivaceo-nigricans, KOH haud reagens.
a. Crusta verruculosa, KOH sanguineo-rubescens. Paraphyses
apice neque capitate neque clavate. Spore 18—24 u longe, 7—10
(—11) u crasse.
Rh. ignobile Th. Fr.
B. Crusta subcontinua v. rimoso-areolata, rarius verruculosa,
KOH haud sanguineo-rubescens. Paraphyses apice capitate v.
distincte clavatze.
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