The lichen family Physciaceae in Thailand-I. The genus Pyxine
Author
Mongkolsuk, Pachara
Lichen Research Unit, Biology Department, Faculty of Science, Ramkhamhaeng University, Ramkhamhaeng road 24, Bangkok, 10240 Thailand. Email: pm-tamrapap @ ru. ac. th
Author
Meesim, Sanya
Lichen Research Unit, Biology Department, Faculty of Science, Ramkhamhaeng University, Ramkhamhaeng road 24, Bangkok, 10240 Thailand. Email: pm-tamrapap @ ru. ac. th
Author
Poengsungnoen, Vasun
Lichen Research Unit, Biology Department, Faculty of Science, Ramkhamhaeng University, Ramkhamhaeng road 24, Bangkok, 10240 Thailand. Email: pm-tamrapap @ ru. ac. th
Author
Kalb, Klaus
Lichenologisches Institut Neumarkt, Im Tal 12, D- 92318 Neumarkt, Germany. Email: klaus. kalb @ arcor. de & University of Regensburg, Institute for Botany, Universitätsstra e 31, D- 39040 Regensburg, Germany
text
Phytotaxa
2012
2012-07-13
59
1
32
54
http://biotaxa.org/Phytotaxa/article/view/phytotaxa.59.1.2
journal article
10.11646/phytotaxa.59.1.2
1179-3163
5061495
10.
Pyxine daedalea
Krog & R. Sant.
in Moberg,
Thunbergia
2: 7 (1986)
.
Type:—
COSTA RICA
.
Cartago Province
:
13 km
SE of
Cartago
,
2.5 km
SE of Orosi
near the bridge
over
Rio Grande de Orosi
, on a large boulder in a field, ca.
1150 m
;
9°47' N
,
83°50' W
,
10 January 1979
,
H
. Krog &
R
. Santesson 29074
(
holotype
O
; isotype hb. Kalb!)
.
Thallus usually corticolous, seldom saxicolous, 2–6 (–10) cm wide, adnate to loosely adnate, subdichotomously lobate. Lobes radiating, discrete to ± contiguous, plane to slightly concave at the tips, but usually convex from the tips to the centre, 0.4–1.0 mm wide, subrotund to truncate at the apices. Upper surface lead-grey to dark grey or grey-brown in older parts, not pruinose or seldom with a punctiform pruina near the apices. Soralia present, laminal, hemispherical with coarsely granular, grey soredia. Pseudocyphellae marginal and laminal, rare on convex thallus parts, but distinct on plane parts, becoming reticulate. Medulla beige, cream or pale orange in upper part; lower medulla white. Lower surface black in the centre, paler towards the margin; rhizines ± dense, furcate. Apothecia common,
obscurascens
-
type
,
0.3–0.6 mm
wide; disc epruinose. Internal stipe distinct; upper part pale cream or white, K-, P-, C-, KC-; lower part much paler or white, K-, P-, C-, KC-. Ascospores 10–15 ×
6–7 µm
. Pycnidia not seen.
Chemistry: Cortex
K
+ yellow, UV-; medulla upper part:
K
+ reddish to orange,
P
+ orange, C-, KC-, lower part: K-, P-, C-, KC-; containing atranorin (major), terpenes (major or minor), unknown pigment (minor or trace).
Distribution and habitat
:—Rare on bark in coniferous, dry dipterocarp, hill evergreen forests and lower montane scrubs. Also in Africa and South America.
Notes
:—
Pyxine daedalea
is characterized by the cortical atranorin, the presence of laminal soralia, the beige, cream or pale orange medulla and apothecia of the
obscuracens
-
type
with a whitish, K- internal stipe.
Pyxine obscurascens
is similar, but it has a medulla that is distinctly orange.
P. coralligera
exhibits the same array of terpenes as
P. daedalea
, but is readily distinguished in having polysidiangia rather than soralia (
Kalb 1987: 48
).
Material from
Thailand
examined
:—
Chiang Mai
; Queen Sirikit Botanic Garden, on
Catanopsis diversitoria
in dry dipterocarp forest,
530 m
,
18°53' N
,
98°51' E
,
24 January 1994
,
K
. Boonpragob et al. 1026
(
RAMK
).—
Chiang Mai
; Queen Sirikit Botanic Garden, on
Quercus mespilifolioides
in dry dipterocarp forest, 5
30 m
, 1 8°
5 3' N
, 9 8°
5 1' E
, 3
F
e bru a ry 1 99 4,
K
.
B
oo np r ag ob e t a l. 1 39 8, 1 400, 1 404, 1 409
(
RAMK
).—
Chiang Mai
; Queen Sirikit Botanic Garden, on
Adina cordifolia
in hill evergreen forest,
1430 m
,
8 November 1994
,
K
. Boonpragob et al. 3532
(
RAMK
).—
Loei
; Phu Luang Wildlife Sanctuary, Lon Tae Forest Ranger Station, on the bark of
Pinus kesiya
in coniferous forest,
1343 m
,
17°12'00'' N
,
101°33'48'' E
,
12 November 2009
,
MSPL
606, 610
(
RAMK
).—
Nakhon Ratchasima
; Khao Yai National Park, on the bark of
Sycopsis macrophylla
in lower montane scrub,
750 m
,
14°25' N
,
101°36' E
,
18 January 1999
,
K
. Boonpragob 15187
(
RAMK
).