Croton polytrichus Pax
  • Bot. Jahrb. Syst.


Cite taxon page as 'WFO (2020): Croton polytrichus Pax. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000932050. Accessed on: 12 Jul 2020'

Morphology

Stipules linear-subulate or filiform, 3–6 mm. long, sparingly to evenly stellate-pubescent, readily caducous.

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    A monoecious, sometimes semi-scandent shrub or small tree up to 7.5 m. tall, but more usually 3–5 m. tall.

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    Late-season axillary buds ovoid, 7 mm. long, 4-perulate, densely tomentose.

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    Petioles 1–4 cm. long, ferruginous to grey velvety-tomentose; leaf-blade ovate, ovate-lanceolate, oblong-ovate or oblong-elliptic, or in the first leaves of a flush somewhat obovate, (3–)5–8(–13) cm. long, (1.5–)3–6(–7) cm. wide, usually somewhat abruptly and acutely acuminate, the acumen being curved to one side, subcuneate, rounded or slightly cordate or cordulate, the 2 basal glands beneath small and sessile, subentire or minutely glandular-toothed, rigidly membranous to thinly chartaceous, 5–7-nerved from the base, remaining lateral nerves 4–6(–7) pairs, midrib and nerves prominent beneath, tertiary nerves subparallel, densely fulvous to ferruginous stellate-tomentose above and beneath at first, later becoming evenly or sparingly stellate-pubescent above and fairly densely or evenly so beneath, dark green above, paler beneath.

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    Female flowers: pedicels 0.5–1 mm. long, densely stellate-pubescent; sepals 5, linear-lanceolate, 3 mm. long, 0.5–1 mm. wide, sparingly stellate-pubescent without, glabrous within, greenish; petals 0, single stellate hairs occupying their expected points of insertion; disc 5-lobed, the lobes rounded, flat, glabrous; ovary subglobose, 1.5 mm. diameter, densely fulvous to ferruginous stellate-tomentose; styles 3, spreading, 3 mm. long, slightly pubescent at the base, bilobed, the lobes linear, 2 mm. long, glabrous.

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    Fruit 3-lobed, 6 mm. long, 6 mm. diameter, septicidal, evenly brownish stellate-pubescent.

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    Racemes terminal or subterminal, up to 12 cm. long, the lower third-half ♀, the upper half-two-thirds ♂, axis fulvous to ferruginous stellate-tomentose; bracts linear, 3–5 mm. long, evenly stellate-pubescent.

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    Male flowers: pedicels 4–5 mm. long, evenly stellate-pubescent; sepals 5, elliptic-ovate, 2 mm. long, 1 mm. wide, fulvous to ferruginous stellate-pubescent without, glabrous within, greenish; petals 5, oblong-obovate, equalling the sepals, puberulous at the base and apex, creamy-yellow or whitish; disc-glands free, rounded; stamens 15, filaments 2 mm. long, glabrous, anthers 1 mm. long; receptacle pilose.

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    Seeds broadly ovoid, 4–5 mm. long, 3–3.5 mm. wide, dark brown, with a flattened caruncle 1.5 mm. wide.

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    Young shoots densely fulvous to ferruginous stellate-tomentose, in the following season becoming quite glabrous and pale grey or grey-brown.

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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).
    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.
    • D Botanic Gardens Conservation International