全 文 ：Received date: 2013-01-05
Projects funded: Shanghai Landscaping Administrtive Bureau
（Invasive Flora of China G1024011）
Authour: ZENG Xian-feng (1962-), male, Ph.D, professor, E-
mail: zengxianfeng0325@163.com
Mimosa pigra L.—A newly naturalized invasive
plant of Mainland of China
ZENG Xian-feng1, QIU He-yuan1, MA Jin-shuang2
(1.Department of Biology, Hanshan Normal University, Chaozhou 521041, China;
2.Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai 201602, China)
Abstract: Mimosa pigra L., a noxious shrub, has invaded in tropical region of the world, is reported as a new record of naturalized
invasive plant of Mainland of China. The population of M. pigra has been discovered in the riverbank of Nandu River of Haikou City,
Hainan province, China. In this paper, the distribution information in Mainland of China was given, and some discussion about the weed
was made.
Key words: noxious plant; naturalized plant; invasive plant; Mimosa pigra; Mainland of China
CLC Number: Q949.777.7 Document code: A Article ID: 1004-874X(2013)04-0072-02
刺轴含羞草——中国大陆新归化入侵植物
曾宪锋1，邱贺媛1，马金双2
（1.韩山师范学院生物系，广东 潮州 521041； 2.中国科学院上海辰山植物园科学研究中心，上海 201602）
摘 要：报道了1种中国大陆新记录归化入侵植物--刺轴含羞草 Mimosa pigra L.。 标本采自海南省海口市南渡江河岸湿地。 刺
轴含羞草在世界热带地区已经泛滥成灾，极有可能在我国成为入侵植物而造成危害。 提供了刺轴含羞草在中国大陆的分布信息，
并进行了相关讨论。
关键词：有害植物；归化植物；入侵植物；刺轴含羞草；中国大陆
In recent decades, rapid development made habitat
fragmentation and edge effects, could supply better and wider
spatial situation for population occupation, so the naturalized
plants (especially invasive ones) in South China increased
gradually[1-6].
In the recent trip to Hainan province during April 23 to
May 29, 2012, an unknown plant was collected.Upon refering to
the literatures[7-11], such as Flora of Java, the early records of the
Northern territory and a description of the genus Mimosa L.
(Mimosaceae) in the new world, we found Mimosa pigra L. was a
new recorded and naturalized species in Mainland of China. M.
pigra L. is a native of tropical Africa and America, and has been
already considered as a noxious weed in tropical America, and
tropical Asia, including Taiwan and Flora of Malesiana area,
and more serious is that it has been regarded as one of the worst
weeds in Taiwan[12].
1 The collection imformations of Mimasa pigra L. in
Hainan province
1.1 Taxonomy
Mimosa pigra L. (P1), Cent.Pl.1: 13.1755., Backer and
Bakhuizen in Flora of Java 1: 561.1963; Quentin and Fuller in
Plant Invaders p.91, f.4.9.1995; Nielsen in Fl.Malesiana 11:
185.1992.Mimosa asperata L., Syst.Nat.ed.10: 1312.1759; Lu et
al.in Trees of Taiwan 1: 170.2000.
1.2 Characters
The morphological characteristic of M. pigra L. were showed
in Fig.1.An erect and widely branched shrub forming riparian
thickets, up to 1~5 m height; stems with 2 larger sharp recurved
prickles and hairs.Leaves alternate, impinnate, sensitive pinnae
5~15 pairs, 3~6 cm long; leaflets 18~51 pairs, linear to linear-
oblong, apex acute, base obtuse, 4~11 mm long, 0.8~1.5 mm
wide, parallel veins 3~5, margin with bristles, glabrous above,
finely pubescent beneath; stipules erect, nerves 7~10, ovate to
lanceolate, 2~4.5 mm long, 1~2 mm wide, persistent; petiole 1~
2 cm; main rachis with many prickles; 1~2 aculeate on each
internode.Heads 1~3 in the leaf-axils on the higher ones or all
in a terminal raceme; peduncles 1.5~3.5 cm long, clothed with
appressed acroscopic hairs with a thick base; calyx pappus-
like; corolla gamopetalous; stamens as many as or twice as
corolla -lobed, far exserted; filaments free, violet during
anthesis , turning pale with age . Pods 4 ~6 clustered per
capitulum, 4~8 cm long, 1~1.2 cm wide, linear-oblong, flat,
closely beset with rather long, rigid, but not sharp bristles, 10~
25 articulates, splitting transversely into 1 -seeded joints;
sutures undivided, persistent; seeds elliptic- oblanceolate, 5~7
mm wide(Fig.1,inside back cover).
1.3 Location and habitat
Nandujiang(南渡江 ) River Bank, Nanxiangdonglu(南翔
东路), Qiongshan District (琼山区), Hainanin Province （海南
省）; Zeng Xianfeng, 12361(CANT), and 12563(CANT); alt. 5 m;
广东农业科学 2013 年第 4期72
DOI:10.16768/j.issn.1004-874x.2013.04.003
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in sunny and wetland area.
1. 4 Global distribution
Originally from Tropical South America, but now it was
pantropical and spreading rapidly in tropical Asia like as
Sumatra, Java, New Guinea[13], Taiwan[12]. This is the first record
in the Mainland of China.
2 Discussion
Although we really dont know when and how M. pigra was
dispersed or introduced in Hainan, it be sure that it is possible
that the plants invading rate will very high due to the strong
trade and monsoon wind influencing in Hainan province. M.
pigra are rich in the wetland in the region of the river or stream
in Hainan province. By artificial sprouting, we found that the
seeds of M. pigra has germinated easily in moisture soil but in
water. Misfortunely another population has built in lower
reaches of Nandujiang (南渡江 ). We propose that the vital
ability ofM. pigra will be stronger and distribute wider, quicker
and more abundance. The invading rate of M. pigra was so rapid
that it may be naturalized and migrate by water, animals,
topography and wind in the near future. It will threaten the
ecosystems of Hainan seriously. It can influence the growth of
native plants and take possession of them seriously. It is already
considered as a noxious weed in tropical America and rest of
tropical Asia, so the control of this strong invader in the future
is a very important and immeidately task for both amaeturs and
professionals.
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