1. Family: Phyllanthaceae Martinov
    1. Genus: Leptopus Decne.
      1. Leptopus pachyphyllus X.X.Chen

        This species is accepted, and its native range is China (NW. Guangxi).

    [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

    Type
    China, Guangxi, Huanjiang Xian, Xianan, Jingyang, 23 April 1978, Tan 4-3-424 (holotype GXMI!; isotype IBSC!).
    Habit
    Monoecious erect shrub, up to 2 m. Twigs bilaterally flattened, glabrous
    Stipules
    Stipules deltoid, basally not auriculate, apically acute, ferrugineous or almost black, c. 0.5 × 0.25 – 0.5 mm, glabrous, margin entire, glabrous
    Petiole
    Petiole 2 – 6 × 0.8 – 1 mm, ⅒ – ⅙ of leaf blade length, glabrous to sparsely hirsute
    Leaves
    Leaf blade ovate to elliptic or orbicular, basally obtuse to rounded, apically obtuse to acute, (1.7) 2 – 4 (5.5) × (1.2) 1.5 – 2.5 (2.7) cm, 1.2 – 2 times longer than wide, coriaceous, almost succulent, drying concolorous green or reddish brown, glabrous on both sides, margin glabrous to sparsely hirsute; midvein adaxially flat to impressed, abaxially prominent, secondary veins 4 – 6 pairs, adaxially prominent, abaxially prominent. Inflorescences unisexual, always fasciculate
    Bracts
    Bracts as stipules
    Disc
    Disc bilobed for ⅓ of length, lobes apically truncate to rounded, c. 0.5 × 0.5 mm, ¼ – ⅕ as long as sepals, ⅓ – ¼ as long as petals. Stamens 5, 1.6 – 2 mm long; filaments c. 1.5 mm long; anthers 0.2 – 0.3 × 0.25 mm
    Pistillodes
    Pistillode trilobed to base, 1.5 – 2 mm long, glabrous
    Flowers
    Female flowers solitary, 5 – 6 × 4 – 5 mm, larger than males, widely cupular Male flowers solitary, 3 – 4 × c. 5 mm
    Calyx
    Sepals 5, ovate to elliptic, apically obtuse to acuminate, cupular, 3 – 5 × 2 – 2.5 mm, 0 – 1-veined, glabrous outside, glabrous inside, margin entire, glabrous to ciliate, eglandular Sepals 5, ovate, apically acute to obtuse, 3 – 4 × 2.5 – 3 mm, membranaceous, with no venation visible, glabrous outside, glabrous inside, margin entire, glabrous to sparsely ciliate, eglandular
    Corolla
    Petals 5, linear, apically acute, c. 1.8 × 0.6 mm, extending to twice the length of the disc, 1-veined, glabrous. Disc bilobed for ⅓ – ½ of length, c. 0.7 × 0.8 mm, apically rounded to truncate, entire Petals 5, obovate, apically acute, 0.7 – 2 × 0.5 – 0.7 mm, ⅔ of the sepal length, membranaceous, without veins, glabrous on both sides, margin entire, glabrous
    Ovary
    Ovary 3 – 4-locular, glabrous; styles 3, c. 2.5 mm long, free or fused for up to ½ of their length, glabrous; stigmas dilated
    Pedicel
    Fruiting pedicel 25 – 28 mm long. Mature sepals accrescent to 7 – 10 mm long Pedicel 20 – 28 mm long, not articulate, glabrous Pedicel 13 – 17 mm long, articulate just above base, glabrous
    Fruits
    Fruit 7 – 9 × 4 – 6 mm, smooth to faintly reticulate, glabrous, drying orange Columella widest at base, apically linear
    Seeds
    Seeds triquetrous, 2.5 – 3 × 2 – 2.5 × 2 – 2.2 mm, without appendages, smooth, brown
    Embryo
    Embryo with radicle shorter than cotyledons.
    Distribution
    China: Guangxi. Map 3.
    Ecology
    Mixed deciduous or evergreen forest on limestone; c. 1000 m alt.
    Conservation
    Data deficient (DD): this species is known from two collections at the type locality only.
    Note
    Leptopus pachyphyllus is a clearly distinct species. Its thick coriaceous leaves, almost succulent receptacle, long female pedicels, styles connate for up to half of their length and radicle much shorter than the cotyledons are unlike any other Leptopus. The only two known collections are both from the Huanjiang County of Guangxi. Guangxi boasts the greatest diversity of Leptopus in the world, with four out of nine species. L. pachyphyllus has been collected c. 400 km from the other Guangxi endemic, L. fangdingianus. The closest relatives of L. pachyphyllus are most likely L. fangdiangianus and L. clarkei.

    Distribution

    Native to:

    China Southeast

    Leptopus pachyphyllus X.X.Chen appears in other Kew resources:

    First published in Guihaia 8: 233 (1988)

    Accepted by

    • 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 pachyphylla.]

    Sources

    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