A new species and a revised of Sloanea cordifolia (Elaeocarpaceae) in China, southeast Yunnan
Author
Xie, Yifei
Author
Xie, Lei
Author
Zhang, Zhixinag
text
Phytotaxa
2018
2018-04-04
346
2
189
196
http://dx.doi.org/10.11646/phytotaxa.346.2.6
journal article
10.11646/phytotaxa.346.2.6
1179-3163
13708286
Sloanea longiaculeatae
Y. F. Xie & Z. X. Zhang
,
sp. nov.
(
Fig. 3
,
4
)
Type:—
China
.
Yunnan
:
Wenshan
City
,
Maguan County
,
Gulinqing
, alt.
900 m
,
6 Oct. 2017
,
Y.F. Xie
&
J. Zhang
2001
(
holotype
BJFC
00101437
;
isotype
PE
,
BJFC
)
.
Tree to
15 m
tall. Branchlets robust,
6–8 mm
in diam., brown puberulent. Petiole
2.5cm
–
5 cm
, robust, pubescent. Leaf blade broadly elliptic or oblong,
11–26 cm
(length) ×
7–24 cm
(width), thinly leathery, abaxially brown puberulent, midvein prominently raised on both surfaces,
2 mm
–
3 mm
wide, lateral veins 10–13 per side, very prominently raised abaxially, prominent adaxially, veinlets prominently raised abaxially, base cordate, sharp serrated edge, apex acute. Flowers axillary at twig apices, Pedicel length
3cm
-
4cm
, pubescent; Sepals 4 or 5, 6–8 × ca.
4–5 mm
, brown pubescent, outer side is denser. Capsule dehiscent into 4 valves; valves
3.5–4cm
× ca.
2 cm
,
4mm
–
5 mm
thick, woody; prickles yellow,
7–8 mm
long.
Fl. Sept., fr. Oct.
Distribution
&
Habitat
This species is distributed Napo county (
Guangxi
), Maguan county and Malipo county (
Yunnan
). Under dense evergreen broad-leaved wood forest, or tropical monsoon forest, on the limestone slope. The region is the eastern front of a low-latitude plateau and has a subtropical eastern monsoon climate. The elevation is 123–2579 metres above sea level, the average temperature is 16.9 °C, the total accumulated temperature reached is 6169 °C. Streams and rivers
form hot
, warm, and cool dimensional climates at different elevations in the valley.
Etymology:
‘longiaculeatae’ means that fruit prickles are larger than
Sloanea cordifolia
. This species also has described as a new species by Y.M. Shui & W.H. Chen in
Seed plants of the Karst region in
China
. But
Sloanea maguanensis
is a nomen nudum according to the Code (McNeill
et all.
2012). And our field surveys prove that this species is not only distributed in Maguan county.
FIGURE 2.
Flower morphology of
Sloanea tomentosa
(Benth.) Rehder & E.H. Wilson
var. cordifolia
(K. M. Feng ex Hung T. Chang) Y. F. Xie & Z. X. Zhang.
A.
flower at twig apices,
B.
flower adaxially,
C.
flower lateral,
D.
flower longitudinal cutting,
E.
stamen,
F.
sepal(upside) and petal(underside),
G.
ovary(cross-cutting),
H.
leaf (
a.
adaxially,
b.
leaf abaxially),
I.
fruit. (The fruit photoed by Xi-Bing GUO) (corresponding specimen: Flower,
Y.F. Xie & J. Zhang 2026
BJFC
00101462; Fruit,
Y.F. Xie & L. Wang 1743
BJFC
00095734).
FIGURE 3.
Field photos of
Sloanea longiaculeatae
Y. F. Xie & Z. X. Zhang
A.
habitat,
B.
leaf adaxially,
C.
leaf abaxially,
D.
young fruit,
E.
fruit,
F.
branch. (corresponding specimen:
Y.F. Xie & J. Zhang 2027
)
Additional specimens examined
:
China
.
Yunnan Province
, Wenshan City. Malipo County, Tianbo:
Y.F. Xie & J. Zhang 2027
(
BJFC
00101491, 00101503, 00101505, 00101507, 00101509, 00101511, 00101512, 00101514),
Y.F. Xie & J. Zhang 2028
(BJFC 00101483, 00101484, 00101492),
Y. F. Xie & L. Wang 1986
(
BJFC
00095725, 00095731, 00101605),
Y. F. Xie & L. Wang 1798
(
BJFC
00095737, 00101607, 00101608); Maguan County, Gulinqing:
Y.M. Shui 32121
(
PE
1732355),
Y.F. Xie & J. Zhang2001
(
BJFC
00101434, 00101435, 00101436, 00101438, 00101439, 00101440, 00101441, 00101453, 00101456),
Y.F. Xie & J. Zhang2002
(
BJFC
00101452, 00101454, 00101481),
Y.F. Xie & J. Zhang2003
(
BJFC
00101461).