LICHENS AND LICHEN. PARASITES

DODGE--LICHEN8 AND LICHEN PARABITEB 247
Apothecia 0.5-0.7 mm., not white margined ; ascospores
13-15 X 8-9p . . . . B. evamescem
Thallus white to ashy; apothecia 0.3-0.7 mm.
Ascospores a10 X 4-6 (-8)p; areoles flat, 0.33
mm. in diameter ; thecium 45-50p tall, paraphyses
13p in diameter, tips up to 5p . . B. alboradians
Aecospores 9-12 X 5-7p; areoles hemispheric to
flattened, 0.33 mm.; thecium 50-70p tall, para.
physes 1-1.5p in diameter, tips 1.5-2.5~~
B. stellata
Ascospores 11-16 X 8-llp; areoles more or less
- /---. -
granalar ; thecium 100-120p tall ; paraphyses
2-3p in diameter
Tips of parphyses 6-7p in diameter B. dimorphota
Tips of paraphyses 34p in diameter B. Margaritae
IIypotheciulu very dark brown to black
Thallus red within, ashy blackening, margin reddish;
ascosporcs 13-17 (-19) X 6-54 (-9)tr B. Tuxenii
Thallus white within
Tballus olive brown to red brown
Asci 31-50 (-57) X 14-l7p, ascospores 11-15
(-17) X 4-5-7p, thecium SOCI tall; thallus
pale to red brown . . . . B. muscicola
Asci (50-) 70-96 X (16) 18-28tr, ascospores
13-17.5 X 6-llp; thecium 90-110p tall;
thallus dark olive brown B. olivaceobrumneu
Asci 60 X 20p, ascospores (16) 16-18 X,
7-lop, thecium 100-14OP tall ; thallus rufous
to reddish . . . . . . B. Petenna~nni
Asci 60-70 X 20-24p, ascospores 12-17 X (7-)
&gp, thecium 80-110p, thallus ashy rufescent
. . . . . . . . B. Joannae
Thallus white or ashy with pale yellow or rufous
tints
Apothecia 0.1-0.15 mm. in diameter, thdlus
pale yellow, areoles about 1 mm. in diameter ;
ascospores 10-14 X 8-lotr . . B. adwensis
Apothecia 0.35 mm., thallus white, areoles 0.67
mm. ; ascospores 11-14 X 5.5-7~ B. albida
Apothecia 0.4-0.8 mm. in diameter; thallus
ashy with rufous tints.
Thecium 120-130p, ascospores 12-18 X 6.5-9~
B. caesiocinerescens
Thallus chalky-ashy, areoles 0.4-0.6 mm.,
t
; 200400p thick, hypothecium I-
v. typica
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