Taxonomic studies on Amomum Roxburgh s. l. (Zingiberaceae) in Myanmar II: one new species and five new records for the flora of Myanmar
Author
Ding, Hong-Bo
Author
Yang, Bin
Author
Maw, Mya Bhone
Author
Win, Pyae Pyae
Author
Tan, Yun-Hong
text
PhytoKeys
2020
138
139
153
http://dx.doi.org/10.3897/phytokeys.138.38736
journal article
http://dx.doi.org/10.3897/phytokeys.138.38736
1314-2003-138-139
07BA6082162252F7B825F9783A0839A2
Amomum carnosum V.P. Thomas & M. Sabu
Fig. 3
Amomum carnosum
V.P. Thomas & M. Sabu in Kew Bull. 67: 549. 2012; De Boer et al. in Taxon 67(1): 19. 2018. Type: India, Nagaland, Tuensang Distr., Noklak, 20 May 2007,
Thomas & Muhammed Nissar 103698
(holotype: CALI).
Specimens examined.
MYANMAR, Kachin state, Putao district, Upper Shankhaung to Wasandum, understory herbs in tropical rain forest,
27°27'15"N
,
97°14'50"E
, 1007 m elev., 17 June 2018,
Myanmar Exped. M4626
(HITBC!; RAF!).
Distribution.
India, Myanmar.
Note.
Amomum carnosum
was first described by
Thomas et al. (2012)
and recorded as endemic to Nagaland, India. The species is similar to
A. maximum
(
Roxburgh 1810
: 344) in having a bifid membranous ligule, white flowers, but differs in its diffuse, low stoloniferous herb, 30-45 cm tall, leaves 2-3 per shoot, 3-lobed labellum, lamina elliptic and glabrous. In our collection from Myanmar,
Myanmar Exped. M4626
matches well with
Thomas's
type in its morphological structure (
Thomas et al. 2012
). However, it differs in the slightly floral structure and having non-3-lobed labellum. Considering the floral structure of
Amomum
s.l. is easy to tear and corrupt in the rainy season, we consider that the accurate description of
Amomum carnosum
requires further observation and collection of field individuals.
Figure 3.
Amomum carnosum
V.P. Thomas & M. Sabu
A
habit
B
single leaf (back view)
C
leaf blade abaxially
D
ligule
E
rhizome
F
basal part of plant showing inflorescences
G
single flower (side view)
H
single flower (back view)
I
single flower (front view)
J
calyx
K
dorsal corolla lobe
L
lateral corolla lobes
M
floral tube
N
labellum
O
stamen with lateral staminodes (front view)
P
stamen with lateral staminodes (back view)
Q
ovary with epigynous glands
R
style and stigma
S
young fruit with peduncle
T
cross section of fruit. Photographed by H.B. Ding.