Ae 
II. Crusta albida, cinerea v. plus minusve obscurata (rarius oxy- 
data, ferruginea). 
1. Spor& dyblaste (tetrablastis rarissime immixtis). 
ÅA. Spore mature obscurate. 
a. Crusta KOH haud sanguineo-rubescens. Thecium KOH super- 
ne vulgo roseo-violascens. 
a«. Thallus verrucosus Vv. rimoso-areolatus, areolis planis Vv. con- 
vexulis, concoloribus. 
ex. Thecium superne plus minusve distincte violaceum v. pur- 
pureum, KOH roseo-violascens. Spore (27—)30—35(—40) u longe, 
(11—)13—16(—19) u crasse. 
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 disecretis, suborbicularibus, pla- 
niusculis Vv. concavis, margine vulgo pallidioribus. Thecium KOH 
superne purpureo-violascens. Spore (20—)22—28(—30) u long2e> 
(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 long2e, (9J—)10—12(—13) u crasse. 
8. Rh. Copelandii (Koerb.) Th. Fr. 
B. Spore etiam mature hyaline (tantum morbose obscurascentes). 
a. Hyphe medullares J coerulescentes. Thecium superne viola- 
ceo-nigricans, KOH roseo-violascens. Paraphyses apice haud cla- 
vato-incrassate. Spore (19—)22—26(—30) u longe, 8—11(—12) wu 
Crasse. 
9. Rh. polycarpum (Hepp) Th. Fr. 
b. Hyph&e medullares J haud coerulescentes. Thecium superne 
smaragdulo- v. olivaceo-nigricans, KOH haud reagens. 
a. Crusta verruculosa, KOH sanguineo-rubescens. Paraphyses 
apice neque capitate neque clavatx. Spore 18—24 u longe, 7—10 
(—11) u erasse. 
Rh. ignobile Th. Fr. 
8. Crusta subcontinua v. rimoso-areolata, rarius verruculosa, 
KOH haud sanguineo-rubescens. Paraphyses apice capitate v. 
distincte clavatze. 
