A new synonym of Rhododendron leishanicum (subg. Hymenanthes) from China (Ericaceae)
Author
Chen, Sheng
0000-0002-2727-6504
Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, Guizhou, China
Author
Hao, Lei
https://orcid.org/0009-0001-0276-6523
Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, Guizhou, China
Author
Deng, Yi-Hui
https://orcid.org/0009-0006-2821-0247
Liuzhou Forestry Research Institute, Rongshui 545300, Guangxi, China
Author
Yang, Cheng-Hua
0000-0002-5941-676X
Guizhou Academy of Forestry, Guiyang 550005, Guizhou, China
Author
Yuan, Jun-Mei
https://orcid.org/0009-0007-1861-5790
Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, Guizhou, China
Author
Lou, Jia-Xin
https://orcid.org/0009-0001-0276-6523
Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, Guizhou, China
Author
He, Yun-Song
https://orcid.org/0009-0002-8791-558X
Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, Guizhou, China
Author
Chen, Xiang
https://orcid.org/0009-0008-0773-4978
Institute of Biology, Guizhou Academy of Sciences, Guiyang 550009, Guizhou, China
text
PhytoKeys
2024
2024-06-14
243
9
14
journal article
298475
10.3897/phytokeys.243.121263
0e55ac52-8ac1-43a4-8bae-8c44c0c83094
PMC11193047
38912087
Rhododendron oligocarpum
W. P. Fang & S. S. Chang
syn. nov.
Type.
China
.
Guizhou province
:
Yinjiang county
,
Sanduodian
,
2070 m
elev,
14 april 1964
,
Z. S. Zhang
et al. 401557 (
holotype
:
HGAS 0088928
!;
isotypes
:
IBSC 0481928
!;
PE 01297915
!,
PE 01297916
!;
paratype
:
HGAS 007915
!;
IBK 00187538
!,
IBK 00187539
!,
IBK 00187541
!,
IBK 00187559
!;
PE 00312607
!,
PE 00313389
!;
KUN 540382
!;
SZ 0036179
!)
.
Description.
Shrubs or small trees,
3–6 m
tall; bark grey, dehiscent on drying;
branchlets
terete, setose when young, gradually glabrescent.
Petiole
rounded abaxially, furrowed adaxially,
5–15 mm
, densely setose;
leaf
blade leathery, elliptic or obovate, 4–8 ×
2–4 cm
; base rounded or subcordate; margin revolute, apex rounded, with small apiculate; adaxial surface green, abaxial surface pistachio; mid-rib impressed abaxially, grooved adaxially, glabrous or sometimes sparsely hairy; lateral veins 11–15 - paired, slightly conspicuous on both surfaces.
Inflorescence
racemose-umbellate, 3–5 - flowered; rachis
5–7 mm
, tomentose.
Pedicel
1–2 cm
, densely setose-tomentose;
Calyx
small, discoid, lobes 5, triangular, tomentose,
1–2 mm
.
Corolla
campanulate, purple-red to rose-red, with deep purple basal spots,
3–3.5 cm
; lobes 5, suborbicular, ca. 1.5 ×
2 cm
, apex emarginate;
stamens
10, unequal,
1–3 cm
, filaments puberulent at base;
ovary
cone-shaped,
4–5 mm
, densely densely setose and tomentose;
style
2.5–3 cm
, glabrous, stigma slightly expanded.
Capsule
cylindrical, 20–25 ×
7 mm
, rough. Flowering from April to May and fruiting from September to October.
Distribution and habitat.
Rhododendron leishanicum
is distributed in Eastern
Guizhou
and North-eastern
Guangxi
. It grows in Thickets at
1800–2500 m
a. s. l.
Specimens examined.
China
.
Guizhou
:
Qiandongnan Prefecture
,
Leigong Mountain
,
P. L. Song
1016
(
GYBG
barcode 0002282, 0002283),
4407
(
CCNU
barcode 9018123),
4717
(
CCNU
barcode 9018122)
;
Tongren City
,
Fanjing Mountain
,
Z. S. Zhang
et al. 401673 (
IBSC
barcode 0481934),
401317
(
HGAS
barcode 0088940,
IBSC
barcode 0481929),
400681
(
HGAS
barcode 0088933),
400610
(
HGAS
barcode 0088939),
Z. P. Jian
32039
(
HGAS
barcode 0088938),
Wuling Mountain Expedition
731
(
GFS
barcode 0007355,
KUN
barcode 0339467, 0339468,
PE
barcode 00258535),
1348
(
GFS
barcode 0007356,
KUN
barcode 0339469)
.
Guangxi
:
Guilin City
,
Maoer Mountain
,
G. Z. Li
11272
(
IBK
barcode 00187540),
12378
(
IBK
barcode 00187542),
12084
(
IBK
barcode 00187561),
F. X. Jin
1066
(
HTC
barcode 0010523, 0010524, 0010525),
J. X. Zhong
83311
(
IBK
barcode 00187551, 00187552,
IBSC
barcode 0481913),
83523
(
IBK
barcode 00187560),
81647
(
IBK
barcode 00187566, 00187567),
L. M. Gao
20077
(
KUN
barcode 0767388, 0767389)
.