Page 8 - 《广西植物》2020年第1期
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4 广 西 植 物 40 卷
2 ̄or 4 ̄hornedꎬ rarely 0 ̄hornedꎬ rhombic or triangular ̄ 13412 ( IBSCꎬ WUK )ꎻ Huizhouꎬ W. Chen 9685
rhombicꎬ exocarp succulentꎬ endocarp stonyꎻ crowns (IBSC). Guizhou: Jingpingꎬ C. Y. Wang 770012
conspicuousꎬ tetragonal or roundedꎬ rarely dome ̄shapeꎬ (JXU). Hebei: Anxinꎬ Baiyangdianꎬ Z. Y. Cao 54
or crownless and inconspicuousꎬ apex conspicuously ( PE ). Heilongjiang: Songjiangꎬ G. Z. Wang et
beakedꎬ or beakless. Seed 1ꎻ cotyledons unequalꎬ one al. 1282 ( IFP ). Henan: Mt. Funiushanꎬ Henan
large starchyꎬ and the other smallꎬ scale ̄likeꎻ For. Bur. Exped. 514 ( PE). Hubei: Jingshanꎬ a ̄
endosperm absent. nonymous 225 ( JXU ). Hunan: Qianyangꎬ
Two species: Trapa incisa and T. natansꎬ and anonymous 491 (PE). Jiangsu: Gaoyouꎬ East China
T. natans were divided into six varieties in Chinaꎬ Exped. 2608 ( NAS)ꎻ Liyangꎬ C. C. Chang 1673
mainly distributed in middle and lower catchment of the ( NAS )ꎻ Suiningꎬ anonymous 20297 ( NAS )ꎻ
Yangtzi River. Suzhouꎬ H. Migo s. n. ( NAS!). Jiangxi: Ji’ anꎬ
1. Trapa incisa Siebold & Zucc.ꎬ in Abh. Math. ̄ B. Y. Ding & T. Huang 6400 ( HZU)ꎻ Linchuanꎬ
Phys. Cl. Königl. Bayer. Akad. Wiss. 4 ( 2): 134. Y. Tsiang 9794 ( NASꎬ IBSC )ꎻ Nanchangꎬ W.
1845. ≡ T. bispinosa Roxb. var. incisa ( Siebold & H. Wan 770005 ( JXU )ꎬ H. Migo s. n. ( NAS )ꎬ
Zucc.) Franch. & Sav.ꎬ Enum. Pl. Jap. 1: 171. X. X. Yang 10780 ( IBSC ). Jilin: Fuyuꎬ Y. L.
1875. ≡ T. natans L. var. incisa ( Siebold & Zucc.) Chang & S. D. Zhao 2751 ( IFP )ꎻ Chunhuaꎬ Z.
Makinoꎬ Bot. Mag. ( Tokyo) 11: 283. 1897. Type: Y. Wang et al. 2108 ( IFP ). Liaoning: Shenyangꎬ
JAPANꎬ without precise localityꎬ P. F. Siebold s. G. Q. Guan s. n. ( SYAU)ꎻ Kaiyuanꎬ P. Y. Fu &
n. (lectotype: Mꎬ designated by S. Akiyama et al. in Y. L. Chang 3061 ( IFP)ꎬ 3071 ( IFP ). Shaanxi:
2016: 20). Nanzhengꎬ K. T. Fu 5486 (PE). Shanghai: Liuheꎬ
细果野菱 Fig. 1 H. Migo s. n. ( NAS). Yunnan: Daliꎬ C. W. Wang
Herbs annualꎬ floating. Stem slenderꎬ 1-2.5 mm 63487 (KUNꎬ NAS). Zhejiang: Deqingꎬ T. N. Liou
in diam. Leaves dimorphic: Floating leaves alternateꎬ 7942 (PE)ꎻ Hangzhouꎬ B. Y. Ding & Q. M. Zhang
crowned at tops of stems or branchesꎬ rosetteꎻ leaf 1816 ( HZU )ꎬ 2120 ( HZU )ꎬ B. Y. Ding 2001
blades triangular ̄ovateꎬ 1.5-2.5 cm × 2-3 cmꎬ in ̄ (HZU)ꎬ 2287 ( HZU)ꎻ Jinhuaꎬ B. Y. Ding 3983
cised ̄dentate at upper margin and entire at lower mar ̄ (HZU)ꎻ Jinyunꎬ B. Y. Ding 4877 (HZU)ꎻ Pujiangꎬ
ginꎬ broadly cuneate at baseꎻ petioles slenderꎬ B. Y. Ding & W. S. Yao 4449 ( HZU)ꎻ Shaoxingꎬ
slightly inflated at middle. Submerged leaves smallꎬ B. Y. Ding & Q. M. Zhang 1798 ( HZU )ꎬ 1806
caducous. Flowers pinkꎬ solitary in leaf axilsꎻ pedicel (HZU)ꎬ 2176 (HZU)ꎬ B. Y. Ding & M. Z. Shi 6201
1- 2 cm long. Sepals 4ꎻ petals 4ꎬ disk entireꎻ (HZU)ꎻ Tiantaiꎬ Zhejiang Bot. Exped. 28406 (HZU)ꎻ
stamens 4ꎬ filaments slenderꎬ anthers introrseꎬ versa ̄ Yinxianꎬ B. Y. Ding & M. Z. Shi 6211 (HZU)ꎻ Yiwuꎬ
tileꎻ ovary partly inferiorꎬ style subulateꎬ stigma capi ̄ W. H. Huang 8358 (HZU).
tates. Fruits triangular ̄rhombicꎬ 1-1.2 cm tallꎻ pedi ̄ Distribution. from south to north region of East
cels ca. 2. 5 cm longꎻ 4 ̄hornedꎬ 2 upper horns Chinaꎬ also in Myanmarꎬ Indonesiaꎬ Japanꎬ Koreaꎬ Lo ̄
slightly obliquely horizontalꎬ barbellateꎬ 2 lower horns asꎬ East Russiaꎬ Thailand and Vietnam.
downwardꎬ barbellateꎻ beaks ca. 3 mm longꎬ Note. The nameꎬ Trapa maximowicziiꎬ was
crownless. Fl. May ̄Sept. and fr. Jun.-Oct. misused in this entity by some Chinese scholars (Yanꎬ
Additional collections studied. China. Anhui: 1983ꎻ Wanꎬ 1984ꎬ 2000ꎻ Yuꎬ 1994). Trapa incisa is a
Anqingꎬ H. Migo s. n. ( NAS)ꎻ Chaohu Lakeꎬ B. distinct speciesꎬ with smaller leavesꎬ flowers and
Y. Ding et al. 6221 ( HZU )ꎻ Dangtuꎬ Dangtu fruits. The floating leaves of Trapa incisa are rhombicꎬ
Exped. 1011 ( NAS!)ꎻ Jingxianꎬ H. Zhang 843 incised ̄dentate on upper marginꎬ flowers pinkꎬ fruit 4 ̄
(NAS)ꎻ Shuchengꎬ East China Exped. 4065 (PE)ꎻ hornedꎬ with 2 upper horns barbellateꎬ and beak con ̄
Wuhuꎬ H. Migo s. n. ( NAS ). Fujian: Fuzhouꎬ spicuous.
M. S. Li 1100 ( IBSC )ꎻ Nanjingꎬ S. M. Hwang 2. Trapa natans L.ꎬ in Sp. Pl. 1: 120. 1753.
190047 ( IBSC). Guangdong: Dinghuꎬ G. L. Shi Type: ITALYꎬ Mantuaꎬ2 Sept.1902ꎬ A. Fiori et al. 471