Corchorus argillicola Moeaha & P.J.D.Winter
  • Bothalia


Cite taxon page as 'WFO (2020): Corchorus argillicola Moeaha & P.J.D.Winter. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000506884. Accessed on: 29 Nov 2020'

Diagnostic Description

This species was included in Corchorus confusus by Wild, but the comparison of live and herbarium material indicates that two distinct taxa are involved and that the populations from deep black turf or clay soils represent a distinct species, ecologically separated from C. confusus. Corchorus argillicola is related to C. confusus and C. trilocularis by the more or less straight capsules and fruiting pedicels. Herbarium specimens of these three species may easily be confused. Wild hypothesized the confusion of C. confusus and C. trilocularis in herbarium material to the possibility that C. confusus is of hybrid origin with C. trilocularis and C. asplenifolius as putative parents. However, field visits have indicated that these species are quite different. The new species differs mainly in the distribution of trichomes, which occur all over the surface on the capsules, and in the lack of longitudinal ridges on the capsules at all stages of development. In contrast, the capsules of C. confusus are angular, and sparsely scabrous on the angles or glabrous, whereas in C. trilocularis they have trichomes confined to the ridges and on the angles, and are otherwise glabrous. Furthermore, this new taxon is a perennial, whereas C. trilocularis is an annual weed of cultivation.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Morphology

    Perennial herb with prostrate or spreading stems from a woody rootstock; branches with pubescence all around stem, or sometimes with line of short hairs on one side of stem only. Leaf blade narrowly ovate, 30-50(-80) x 10-18(-25) mm, obtuse in basal leaves, crenate or serrate-crenate, sometimes with pair of basal setae, pubescent on both surfaces, especially on nerves, hairs not tubercle-based; petiole up to 15 mm long, pubescent; stipules up to 7 mm long, setaceous, pubescent. Inflorescence of (1)2-4-flowered cymes opposite upper leaves; peduncles 3-5(-20) mm long, pubescent, pedicels up to 3-5(-7) mm long, pubescent. Sepals narrowly lanceolate, up to 8 mm long, pubescent abaxially. Petals yellow, narrowly obovate, up to 8 x 5 mm, with short ciliate claw, androgynophore ±0.5 mm long, with an annulus. Stamens numerous. Ovary cylindrical, densely pubescent; style ±2.5 mm long, slender, glabrous, stigma cuspidate. Capsules up to 90 mm long; fruiting pedicel straight, densely or sparsely pubescent, without longitudinal ridges. Seeds numerous, black, ±1.5 x 1 mm.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Habitat

    Corchorus argillicola is restricted to deep black turf and clayey soils.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Distribution

    It occurs mainly in the Limpopo basin, but extends to the Chipinge District in SE Zimbabwe and to Maputaland in northern KwaZulu-Natal.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

      Bibliography

    • 1 Bothalia
    • 2 Moeaha, MJ. 2006. Malvaceae: A new species of Corchorus in Southern Africa. Bothalia 36(2): 168 - 171.

     Information From

    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • A All Rights Reserved
    Malvaceae
    World Flora Online Data. 2017.
    • B CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).