Croton alienus Pax
  • Bot. Jahrb. Syst.


Cite taxon page as 'WFO (2020): Croton alienus Pax. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000927260. Accessed on: 10 Jul 2020'

Morphology

Male flowers: pedicels 3–4 mm. long, sparingly stellate-pubescent; calyx 5-lobed, the lobes broadly ovate, 2 mm. long, 1.75 mm. wide, rounded-obtuse, subglabrous without, glabrous within, puberulous at the apex, green, the lower part of the calyx sparingly stellate-pubescent without; petals 5, elliptic-oblong, 2 mm. long, 1 mm. wide, obtuse, glabrous without except at the base, villous within and on lower margins, puberulous at the apex, greenish white; disc-glands free, rounded; stamens 11, filaments 2 mm. long, glabrous, anthers 1 mm. long; receptacle villous.

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    Racemes terminal, subterminal or pseudaxillary, (2–)4–9(–11.5) cm. long, either all ♂, all ♀, or mostly ♂ with 1–2 ♀ flowers at the base; axis sparingly stellate-pubescent to subglabrous; bracts oblong-lanceolate, 2 mm. long, subacute or obtuse, subglabrous.

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    Stipules linear-subulate, (2–)3–5(–6) mm. long, ± glabrous, subpersistent.

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    Petiole 0.2–1.3(–2.4) cm. long, evenly to sparingly scurfily stellate-pubescent; leaf-blade oblong, elliptic-oblong, elliptic or elliptic-lanceolate, (4–)5–11(–13) cm. long, 1.5–4.5(–5.5) cm. wide, obtuse or subacute, rounded or subcuneate, with 2 sessile turbinate basal glands on the adaxial surface, remotely denticulate-serrulate, firmly chartaceous, completely penninerved, with 7–15 pairs of lateral nerves looped well within the margin, not or slightly prominent above and beneath, glabrous or almost so above, and glabrous beneath except for the sparingly stellate-pubescent midrib, drying greenish.

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    Fig. 27.

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    A monoecious or ?dioecious shrub or small tree up to 4.5 m. tall.

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    Seeds compressed-ellipsoid, 8 mm. long, 4 mm. wide, reddish brown streaked with buff, somewhat shiny, with a small caruncle 1.5 mm. wide.

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    Young twigs evenly or sparingly scurfily stellate-pubescent.

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    Fruit trilobed-ellipsoid, 1 cm. long, 0.8 cm. wide, septicidal, very sparingly stellate-pubescent or almost glabrous, green at first, becoming dark red or black when ripe.

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    Older twigs greyish brown.

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    Female flowers: pedicels (2–)4–5 mm. long, stouter than the ♂ pedicels, extending to 8 mm. in fruit, evenly to sparingly stellate-pubescent; sepals 5, broadly ovate, 3 mm. long,  2.5 mm. wide, obtuse, very sparingly stellate-pubescent without, glabrous within, minutely puberulous at the apex, green; petals 0–5, oblong, 2 mm. long, 0.75 mm. wide, obtuse, glabrous without and within, villous on the margin towards the apex; disc of 5 very small free rounded glands; ovary subglobose, 2 mm. diameter, sparingly stellate-pubescent; styles 3, spreading, glabrous, bipartite almost to the base, the lobes filiform, 3 mm. long, creamy white.

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     Information From

    Euphorbiaceae
    • A CC0 1.0 Universal (CC0 1.0).
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • B
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).
    International Union for Conservation of Nature
    https://www.iucn.org/
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • D All Rights Reserved
    International Union for Conservation of Nature v.3
    https://www.iucnredlist.org/
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • E See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use
    Global Tree Assessment
    http://www.bgci.org/
    BGCI. 2018. GlobalTreeSearch online database. Botanic Gardens Conservation International. Richmond, U.K. Available at www.bgci.org. Accessed on 30/11/2018.
    • F Botanic Gardens Conservation International