1. Family: Phyllanthaceae Martinov
    1. Genus: Leptopus Decne.
      1. Leptopus clarkei (Hook.f.) Pojark.

        This species is accepted, and its native range is E. Assam to S. China.

    [KBu]

    Vorontsova, M.S. & Hoffmann, P. 2009. Revision of the genus Leptopus (Phyllanthaceae, Euphorbiaceae sensu lato). Kew Bulletin 64: 627. DOI: https://doi.org/10.1007/s12225-009-9155-x

    Note
    Synonym: Arachne clarkei (Hook. f.) Pojark. (1940: 342), nom. invalid. Synonym: Andrachne clarkei Hook. f. (1887a: 285). Ascendant creepers, members of this species have a stretched habit, generally with longer thinner sepals and acuminate leaves. Leaf size, sepal size and indumentum vary.
    Type
    Assam, Nagaland, Kohima, 4 Nov. 1885, Clarke 41671 (lectotype K! 41671C, selected here; isolectotypes BM! 41671B, K! 41671A). The lectotype was chosen because it bears Hooker’s annotated drawings.
    Habit
    Monoecious procumbent to ascendent herb to subshrub, up to 1.5 m
    Stem
    Stem flexuous
    Twigs
    Twigs longitudinally strongly ribbed, glabrous to hirsute, white to light green, rarely reddish
    Stipules
    Stipules deltoid, basally not auriculate, apically acute, ferrugineous, 0.8 – 1.2 × 0.4 – 0.6 mm, glabrous, margin entire, ciliate
    Petiole
    Petiole 1.5 – 10 × 0.4 – 0.7 mm, c. ⅛ of leaf blade length or shorter, hirsute
    Leaves
    Leaf blade ovate to lanceolate, basally rounded, sometimes obtuse, rarely acute, apically acuminate, (1.5) 2 – 6.5 (10) × (0.8) 1 – 2 (3) cm, 2 – 3 (rarely up to 6) times longer then wide, chartaceous, sometimes membranaceous, drying concolorous to slightly discolorous; whitish green to yellowish or greyish light green, glabrous adaxially, glabrous to sparsely hirsute abaxially, margin glabrous to hirsute; midvein adaxially flat to prominent, abaxially prominent, secondary veins 3 – 6 pairs, sometimes not visible, adaxially flat, abaxially flat to prominent
    Inflorescences
    Inflorescences unisexual or bisexual, male inflorescence axis 0 – 0.1 (3) mm long
    Bracts
    Bracts as stipules
    Flowers
    Male flowers 1 – 3 per fascicle, 1 – 2 × 2 – 4 mm Female flowers 1 – 2 per fascicle, 2 – 5 × 2.5 – 6 mm, 2 – 3 times larger than males, predominantly narrowly cupular
    Stamens
    Stamens 5, 0.8 – 1.3 mm long; filaments 0.7 – 1.2 mm long; anthers 0.2 – 0.3 × 0.2 – 0.25 mm
    Pistillodes
    Pistillode trilobed for ¼ of length or almost to base, 0.4 – 0.6 mm long, ⅓ - ⅔ of stamen length, glabrous to hirsute
    Pedicel
    Pedicel 10 – 20 mm long, not articulate, glabrous Pedicel 5 – 17 × less than 1.5 mm, articulate just above base, glabrous to hirsute
    Calyx
    Sepals 5, ovate to elliptic, apically acute to acuminate, 1.5 – 5 × 0.7 – 1.8 mm, 0 – 3-veined, glabrous to hirsute outside, glabrous inside, margin entire, glabrous to ciliate, eglandular Mature sepals not accrescent Sepals 5, obovate to oblong, apically rounded, 1.2 – 3 × 0.7 – 1.4 mm, membranaceous, 0 – 3-veined, hirsute outside, glabrous inside, margin erose, glabrous to sparsely ciliate, eglandular
    Corolla
    Petals 5, obovate, apically rounded, 0.2 – 0.5 × 0.2 – 0.3 mm, slightly shorter than disc or extending slightly beyond disc, without veins, glabrous Petals 5, obovate, apically rounded, 0.8 – 1.5 × 0.25 – 1 mm, ⅔ of sepal length, membranaceous, 0 – 1-veined, glabrous on both sides, margin entire to erose, glabrous
    Disc
    Disc bilobed for ¾ of length, 0.5 – 1 × 0.2 – 0.7 mm, apically acute to truncate, erose or crenulate, up to ⅓ of sepal length Disc bilobed for ⅘ - ⅚ of length, lobes apically truncate to rounded, 0.7 – 1.8 × 0.1 – 0.25 mm, ⅔ as long as sepals to slightly shorter than sepals, slightly longer or shorter than petals
    Ovary
    Ovary 3-locular, glabrous to sparsely hirsute; styles 3, 0.7 – 1 mm long, free, glabrous; stigmas dilated to capitate. Fruiting pedicel 14 – 35 mm long
    Fruits
    Fruit 2 – 3.5 × 3.5 – 5.5 mm, smooth to faintly reticulate, glabrous to sparsely hirsute, drying red brown to brown Columella widest at base, apically linear, 2 – 3 × c. 0.5 mm
    Seeds
    Seeds triquetrous, 1.8 – 2.5 × 1.5 – 2 × 1.5 – 2 mm, without appendages, smooth, orange to brown
    Embryo
    Embryo with radicle slightly shorter than cotyledons
    Distribution
    Southern China, extending west to Assam and Burma, and south to northern Vietnam. Map 1.
    Ecology
    Mixed forest understorey on sand, granite or limestone; 500 – 2500 m.
    Conservation
    Least concern (LC): extent of occurrence exceeds 20,000 km2.

    Images

    Distribution

    Native to:

    Assam, China South-Central, China Southeast, Myanmar, Vietnam

    Leptopus clarkei (Hook.f.) Pojark. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Aug 1, 2007 Clarke, C.B. [41671], India K000186354 lectotype
    Aug 1, 2007 Clarke, C.B. [41671], India K000186355 isolectotype
    Aug 1, 2007 Esquirol, J.H. [110], China K000186273 isotype
    Jun 16, 2003 Forrest, George [22495], China Andrachne esquirolii K000186275
    Jun 16, 2003 Forrest, George [10917], China Andrachne esquirolii K000186278
    Cavalerie, J. [1075], China Andrachne esquirolii K000186282
    Cavalerie, J. [1288], China Andrachne esquirolii K000186283
    Henry, Aug. [10,989c], China Andrachne esquirolii K000186279
    Henry, Aug. [10,989], China Andrachne esquirolii K000186280
    Henry, Aug. [10,989], China Andrachne esquirolii K000186284
    Henry, Aug. [10,989], China Andrachne esquirolii K000186285
    Henry, Aug. [10,989A], China Andrachne esquirolii K000186286
    Henry, Aug. [10.989B], China Andrachne esquirolii K000186287
    Maire, E. E. [608], China Andrachne esquirolii K000186281
    Jun 16, 2003 Delavay, abbe M. [3269], China Andrachne clarkei K000186272
    Bor, N.L. [6397], India Andrachne clarkei K000186356

    First published in Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk S.S.S.R. 20: 272 (1960)

    Accepted by

    • Chakrabarty, T. & Balakrishnan, N.P. (2018). Indo-Burmese Phyllanthaceae: A Taxonomic Revision: 1-437. Bishen Singh Mahendra Pal Singh, Dehra Dun.
    • Vorontsova, M.S. & Hoffmann, P. (2010). Revision of the genus Leptopus (Phyllanthaceae, Euphorbiaceae sensu lato) Kew Bulletin 64: 627-644.

    Not accepted by

    • Govaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew. [Cited as Andrachne clarkei.]

    Literature

    Kew Backbone Distributions
    • Vorontsova, M.S. & Hoffmann, P. (2010). Revision of the genus Leptopus (Phyllanthaceae, Euphorbiaceae sensu lato) Kew Bulletin 64: 627-644.
    • Balakrishnan, N.P. & Chakrabarty, T. (2007). The family Euphorbiaceae in India. A synopsis of its profile, taxonomy and bibliography: 1-500. Bishen Singh Mahendra Pal Singh, Dehra Dun.

    Sources

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Bulletin
    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0