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KROG 1988); corticolous and saxicolous.
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Lower surface pale brown
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Upper surface not maculate
Bulbothrix setschwanensis (Zahlbr.) Hale
Bulbothrix setschwanensis
(Zahlbr.) Hale, Phytologia 28:
481 (1974).
Syn.:
Parmelia setschwanensis
Zahlbr., Symbolae Sinicae 3:
184 (1930).
Description:
Thallus adnate, 4-10 cm wide,
lobes 2–4 mm wide with sparse, bulbate marginal cilia; upper
surface pale grey, ± shiny, lacking isidia and soredia; lower
surface pale brown with dense, simple, pale brown to black
rhizines. Cortex K+ yellow; atranorin. Medulla K+ yellow
turning red, C–, KC-, P+ orange; salazinic acid.
Distinguished from
B. meizospora
by the pale brown (rather
than dark brown to black) lower surface.
B. hypocraea
has a
distinctly maculate upper surface.
Ecology and distribution:
Corticolous in northern Thailand, occurring in evergreen
forest above 1000 m and in dry dipterocarp forest at 600 m.
Reported from SE Asia, China (HALE 1976a; WOLSELEY
et al. 2002) and India (DIVAKAR & UPRETI 2005).
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Upper surface maculate
Bulbothrix hypocraea (Vain.) Hale
Bulbothrix hypocraea
(Vain.) Hale, Phytologia 28: 480
(1974).
Syn.:
Parmelia hypocraea
Vain. in Catal. Wolwitsch Afric.
Plants 2: 400 (1901).
Description:
Thallus adnate, 3–5(–7)
cm wide, lobes 1–3.5 mm wide with marginal bulbate cilia;
upper surface pale mineral grey, distinctly maculate, lacking
isidia, soredia and pustules; lower surface pale to dark brown
with moderately dense and thick rhizines, concolorous with
or darker than lower surface. Cortex K+ yellow; atranorin.
Medulla K+ yellow turning red, C–, KC-, P+ orange;
salazinic acid. Distinguished from other species with a pale
tan lower surface by the branched rhizines.
Ecology and
distribution:
Rare in northern Thailand, corticolous in a
deciduous forest at 830 m in Chiang Mai Province, Queen
Sirikit Botanical Garden (POOPRANG et al. 1999). Reported
from S America, S and W Africa (SWINSCOW & KROG
1988) and Asia (WOLSELEY et al. 2002).
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Lower surface rhizinate to margins
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Lower surface with a broad marginal zone without
rhizines
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Medulla K- (or K+ dirty brown)
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Medulla K+ yellow turning red
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Rhizines simple to squarrosely branched. Medulla KC-
Myelochroa irrugans (Nyl.) Elix & Hale