Osteospermum imbricatum L.
  • Mant. ii. 290.


Cite taxon page as 'WFO (2020): Osteospermum imbricatum L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000088381. Accessed on: 25 Oct 2020'

Diagnostic Description

O. imbricatum has narrowly obovoid or ellipsoid achenes, furnished with three acute or very narrow-winged primary ridges and six more or less prominent (sometimes inconspicuous), obtuse secondary ridges with pitted interspaces between the ridges. The involucral scales are usually sparsely glanduloso-muriculate. The closely allied species O. polygaloides has, in contradistinction to O. imbricatum, achenes with obtuse primary ridges and dense glanduloso-muriculate involucral scales. In younger, well-developed specimens of O. imbricatum the stem is erect, c. 1-2 m high, and strongly lignified, usually simple except at the summit, where it ends in more or less corymbose flowering-branches. In older specimens, particularly such as have been damaged by fire or by animals and have lost the primary stem, a varying number of prostrate or ascendent lateral branches, furnished with divaricate twigs, arise from the crown of the root. Thus, older and younger specimens of this species may have quite a different habit of growth.

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

    Morphology

    Suffrutex vel frutex 0.5-2 m altus; caulis erectus vel rarius adscendens valde lignescens dense foliatus indumento ± denso albidolanato deciduo vestitus vel ad axillas modo foliorum floccoso-lanatus vel rarius glaberrimus inferne simplex superne corymboso-ramosus; in speciminibus vetustioribus destructisve plerumque rami laterales adscendentes vel saepe prostrati iterum ramosi, ramis divaricatis, e collo radicis 1-2 cm crasso exeuntes. Folia alterna coriacea glabra glauca sessilia semiamplexicaulia margine integerrima leviter (albido-)cartilaginea leavia vel scabrida; folia basalia et inferiora caulis linearia vel lineari-lingulata vel lineari-oblonga usque 10(-14) cm longa 0.5-2 cm lata obtusa-subacuta mucronulata nervo medio albido prominenti et plerumque nervis longitudinalibus utrinque 1-2 conspicuis instructa; folia caulina sursum sensim longitudine decrescentia; folia intermedia et superiora caulis et folia ramealia oblanceolato-oblonga-late obovata-suborbiculata 0.5-2 cm longa 0.3-1.5 cm lata plerumque imbricata obtusa vel subacuta saepe mucronulata nervo medio subtus prominenti instructa. Inflorescentiae in apicibus caulis et ramorum superiorum corymbosae multi-vel paucicapitulatae; in ramis lateralibus inferioribus pedicelli capitulorum plerumque in apicibus ramulorum solitarii; pedicelli capitulorum sat rigidi ± glanduloso-muriculati 1-5(-10) cm longi bracteis paucis lanceolato-linearibus-lineari-subulatis 3-8 mm longis instructi. Involucri squamae uni-vel subuniseriatae 10-14 fere aequilongae oblongae-obovatae-oblanceolatae 5-7 mm longae 1.5-3 mm latae dorso sparse glanduloso-muriculatae(-puberulae) vel subglabrae acuminatae vel obtusae et mucronatae margine ± late albidoscariosae ciliato-fimbriatae. Flores radii 10-14; ligulae flavae subtus saepe passim violascentes involucrum plus duplo superantes. Flores disci flavi involucro fere aequilongi; appendix apicalis connectivorum atro-violacea. Achaenia glabra c. 6 mm longa c. 2 mm diam. jugis instructa; juga primaria tria acuta saepe minute alata, secundaria sex ± conspicua obtusa bina inter primaria composita; valleculae inter jugas foveolatae.

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

    Habitat

    It occurs down at the coast on the sand dunes as well as up on the mountains, where it ascends to an altitude of c. 1000 metres.

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

    Distribution

    The southernmost part of Cape Colony from the Cape and Malmesbury districts in the west to the Bathurst and Stockenstrom districts in the east.

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

      Bibliography

    • 1 Mant. ii. 290.
    • 2 Norlindh, NT. 1943. Studies in the Calenduleae: 1. Monograph of the genera Dimorphotheca, Castalis, Osteospermum, Gibbaria & Chrysanthemoides. C.W.K. Gleerup, Lund.

     Information From

    Compositae
    CC0 1.0 Universal (CC0 1.0). https://creativecommons.org/publicdomain/zero/1.0
    • A CC0 1.0 Universal (CC0 1.0).
    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
    • B All Rights Reserved
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).