A revision of the genus Lasianthus Jack (Rubiaceae) from Vietnam
Author
Dang, Van-Son
0000-0001-8681-4141
Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. & Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam. & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam. & dvsonitb @ gmail. com; https: // orcid. org / 0000 - 0001 - 8681 - 4141
dvsonitb@gmail.com
Author
Naiki, Akiyo
0000-0002-3235-2823
Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. & Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. & naiki @ lab. u-ryukyu. ac. jp; https: // orcid. org / 0000 - 0002 - 3235 - 2823 * Author for correspondence
naiki@lab.u-ryukyu.ac.jp
text
Phytotaxa
2023
2023-01-26
581
1
1921
1935
http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN
journal article
10.11646/phytotaxa.581.1.1
1179-3163
7571550
31.
Lasianthus honbaensis
V.S.Dang, Tagane
& H.
Toyama
(2015: 263)—
Fig. 54
(plate),
Fig. 52
(map)
Type:
—
VIETNAM
.
Khanh Hoa Province
,
Hon Ba Nature Reserve
,
30 km
west of
Nha Trang City
,
1498 m
elev.,
18 July 2013
,
Tagane S.
,
Yahara T
..
Nagamasu H.
,
Fuse K.
,
Toyama H.
,
Tran H.
,
Son V.D.
with
Loi X.N.
,
Thach N.D.
,
Cuong Q.N.
,
Hieu P.N.H.
,
Thach K.N. V
275
(
holotype
VNM
! [
VNM00042895
]; isotypes
FU
!,
KYO
!,
VNM
! [
VNM00042896
,
VNM00042897
])
.
Specimens
examined:
—
VIETNAM
.
Central:
Khanh Hoa Province
, Hon Ba Nature Reserve,
30 km
west of Nha Trang City,
1498 m
elev.,
18 July 2013
,
Tagane S., Yahara T.. Nagamasu H., Fuse K., Toyama H., Tran H., Son V.D. with Loi X.N., Thach N.D., Cuong Q.N., Hieu P.N.H., Thach K.N. V275a
(
VNM
); in the same location,
1524 m
elev.,
28 November 2017
,
Dang V.S. & Naiki A.
N10118
(
VNM
); in the same location,
1500 m
elev.,
23 July 2018
,
Dang V.S. & Hoang N.T.B.N., Dang 191
(
VNM
, the herbarium of Iriomote Station (Japan));
Lam Dong Province
, Bidoup Nui Ba National Park,
50 km
northeast of Dalat City,
1490 m
elev.,
19 November 2014
,
Toyama H., Tagane S., Dang V.S., Nagamasu H., Naiki A., Tran H., Yang C.J.
V1924
(
FU
,
VNM
).
Distribution:
—Endemic to
Vietnam
(currently known as Hon Ba Nature Reserve of
Khanh Hoa Province
and Bidoup Nui Ba National Park of
Lam Dong Province
).
Habitat & Ecology:
—Growing under secondary and primary montane forests at
1200–1600 m
elev.
Phenology:
—Flowering and fruiting from July to December.
Vernacular name:
—Xú hưƠng hòn bà.
Notes:
—
Lasianthus honbaensis
was described as new from a Vietnamese specimen by
Dang
et al.
(2015)
. It is characterized in having densely appressed pubescent branches, leaf blade coriaceous, secondary veins 6–7 on each side of midrib, flowers white, and fruits orange when ripe.