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Myelochroa subaurulenta
(Nyl.) Elix & Hale, Mycotaxon
29: 233–244 (1987).
Syn.:
Parmelina subaurulenta
(Nyl.) Hale, Phytologia 28:
483 (1974).
Description:
Thallus closely adnate, to 7 cm
wide, lobes closely imbricate, to 4 mm wide, ± truncate at
apices and sparsely ciliate mainly in the axils; upper surface
grey to yellowish grey, smooth; medulla yellow to pale
orange–yellow; lower surface black with dense, simple to
squarrose margins; rhizines up to margins. Cortex K+ yellow;
atranorin. Medulla K+, C+, KC+, P+ orange red; zeorin,
leucotylic acid, leucotylin and related triterpenoids, galbinic
acid (major), secalonic acid (trace).
Ecology and
distribution:
A first record for Thailand where it is
corticolous, in an oak/chestnut and montane evergreen forest
at c. 1550 m in Chiang Mai Province, Doi Suthep National
Park. Asian, previously reported from India and Japan
(HALE 1976c; AWASTHI 2007).
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Lobes with marginal black cilia which are swollen at
the base
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Lobes without cilia, or with simple, eyelash-like cilia
(not swollen at the base)
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Medulla K-. Rhizines branched
Bulbothrix bulbochaeta (Hale) Hale
Bulbothrix bulbochaeta
(Hale) Hale, Phytologia 28: 480
(1974).
Syn.:
Parmelia bulbochaeta
Hale, in Hale & Kurokawa,
Contr. U.S. Natn. Herb. 36: 138 (1964).
Description:
Thallus
adnate, 3–6 cm wide, lobes 1–2 mm wide with marginal
bulbate cilia; upper surface pale grey, lacking isidia and
soredia; lower surface brown with dense, simple to branched
rhizines. Cortex K+ yellow; atranorin. Medulla K– C–, KC,
P–; no medullary compounds detected. According to HALE
(1976), the species has a black lower surface but that of the
Thai specimens is brown (immature).
Ecology and
distribution:
A new record for Thailand (Chiang Mai
Province) where it is rare; corticolous in an evergreen forest
at 1100–1350 m. Known from India (DIVAKAR & UPRETI
2005) and E Africa (SWINSCOW & KROG 1988).
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Medulla K+ yellow turning red (salazinic). Rhizines
simple
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Lower surface dark brown to black
Bulbothrix meizospora (Nyl.) Hale
Bulbothrix meizospora
(Nyl.) Hale, Phytologia 28: 480
(1974).
Syn.:
Parmelia tiliacea var. meizospora
Nyl., Syn. Lich.
1(2): 383 (1860).
Description:
Thallus closely adnate, 7–10
cm wide, lobes 2–5 mm wide with sparse marginal, bulbate
cilia; upper surface pale, glaucous–green, isidia and soredia
absent; lower surface dark brown to black with simple, brown
to black rhizines. Cortex K+ yellow; atranorin. Medulla K+
yellow turning red, C–, KC-, P+ orange; salazinic acid.
Distinguished from
B. setschwanensis
by the dark brown to
black (rather than pale brown) lower surface.
Ecology and
distribution:
Corticolous in northern Thailand (Chiang Mai
Province) in evergreen forest above 1000 m and in dry
dipterocarp forest at 800 m; also reported by POOPRANG et
al. (1999) from Chiang Mai. Predominantly Asian (HALE
1976a; DIVAKAR & UPRETI 2005), but also reported from
Brazil (MARCELLI 1993) and Africa (SWINSCOW &