Leucadendron strobilinum Druce
  • Rep. Bot. Soc. Exch. Club Brit. Isles


Cite taxon page as 'WFO (2020): Leucadendron strobilinum Druce. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001107051. Accessed on: 19 Oct 2020'

Diagnostic Description

L. strobilinum is a stout shrub with short purplish stems clothed with a fairly long, rather widely spaced, erect pubescence, with dark green, glabrous leaves remaining conspicuously ciliate for a long time, with the apical callus not deeply immersed, with somewhat ivory white involucral leaves, with male heads depressed globose and female heads with many florets and with fruits which are quite flat and narrowly winged. It differs from L. laureolum (Lam.) Fourc. which has branches with a short dense erect somewhat matted pubescence, with thinly ciliate becoming eciliate leaves which are somewhat pubescent and narrower, with yellow involucral leaves which more or less conceal the head, with male heads more elongated and female heads with fewer bracts and florets and with broadly winged fruits. It also differs from L. microcephalum Gandoger which has almost glabrous branches, narrow glabrous and eciliate leaves, basal bracts which are conspicuous oily and brown in colour and fruits with the perimeter sharply ridged with a rough excrescence on the median ridge. Futhermore it differs from L. gandogeri Shinz ex Gandoger which has branches with a short dense erect rather matted pubescence, narrower leaves which are glabrous and eciliate except when young with the callus somewhat longer and more deeply immersed at the apex shewing as a distinct notch like mark and with broadly winged fruits.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

    Morphology

    Dioecious shrub to 2.6 m, branching below. Leaves elliptic, ciliate, to 67 mm long (male), to 80 mm long (female), involucral leaves larger, ivory. Male flower heads 24-36 mm diam., female 18-25 mm diam., yeast-scented.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Shrubs up to 2.6 m tall, erect, branching from near the base, with a stout trunk up to 15 cm diam. Branches erect, purplish, stout, more so in the female plants, clothed with an erect pubescence. Leaves in male plants up to 6.7 cm long, 2 cm broad, in female plants up to 8 cm long, 2.3 cm broad, elliptic, obtuse or subacute, mucro reddened recurved obtuse, margins rarely reddened towards the apex, distinctly nerved, dark green, lanate-ciliate at first, often becoming eciliate, sides curved outwards presenting a convex surface towards the axis, leaves of juveniles sparsely pubescent, densely ciliate. Involucral leaves more crowded, not numerous, becoming cream coloured, differing in size. Male inflorescence 1.8-2.5 cm long, 2.4-3.6 cm diam., globose, solitary, terminal, silvery white in bud, giving off a strong yeasty smell. Basal bracts 12 mm long, 8 mm broad, about 20 in number, ovate, subacute, glabrous, ciliate, somewhat oily, dusky and recurved above, the innermost becoming densely pubescent below. Floral bract 4.5 mm long, linear, obtuse, densely crisped-pubescent mostly in the middle, ciliate. Floral bud 10 mm long, slender, apex yellow or slightly reddened, evenly curved, glabrous, surrounded by a tuft of hairs at the base. Perianth tube 5 mm long, glabrous. Claw 3 mm long, slender, glabrous, recurved 180°. Limb 2.5 mm long, concave, spathulate. Anther 1.7 mm long, linear, curled upwards. Pollen triangular in polar view with swollen apices and sides 37 µ long, polar depth 23 µ. Stigma abortive, 1.5 mm long, clavate, entire, acting as a pollen presenter. Style 7.5 mm long, filiform, narrower above. Hypogynous scales 3.5 mm long, acicular, pale yellow. Nectar seen filling the perianth tube above the hypogynous scales. Receptacle 1.7 cm long, 1.4 cm diam., globose. Female inflorescence 3-4 cm long, 1.8-2.5 cm diam., narrowly ovoid, with florets numerous and arranged in 13 ascending spiral rows with about 30 cm each, giving off a strong yeasty smell. Basal bracts 12 mm long, 8 mm broad, about 15 in number, apex dark brown and recurved, somewhat oily. Floral bract 6 mm long, 10.7 mm broad, transversely oblong, ciliate, with a small area of pubescence towards the centre below. Floral bud 9 mm long, glabrous, transversely compressed. Perianth segments imbricated forming a tube 6 mm long, glabrous. Claw 2 mm long, recurved 145°, glabrous. Limb 1.2 mm long, glabrous, concave, hooked, anterior somewhat flattened. Staminode 0.5 mm long, curled upwards, anterior absent or rudimentary. Ovary 1.3 mm long, ovoid, lobed above, glabrous. Style 7 mm long, glabrous, filiform, narrower- below. Stigma 0.8 mm broad, suboblique, entire. Hypogynous scales 2.6 mm long, acicular, pale. Nectar gathers at the throat of the perianth tube. Receptacle 3 cm long, 1.2 cm diam., clavate with a conical apex. Mature female head indehiscent, 4-6.5 cm long, 3-4.1 cm diam., ovoid, glabrous, with bracts numerous, subretuse, sparsely pubescent in the middle, connate below, arranged in three spirals. Fruit samaroid, 6.5-8.5 mm long, 5-6 mm broad, compressed, ob-cordate, dusky, emarginate, winged, pitted.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

    Habitat

    Damp, S-facing, upper sandstone slopes.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Damp rocky places with a southern aspect, at altitudes over 1500 feet above sea level.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

    Distribution

    Cape Peninsula.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Endemic to the Cape Peninsula.

  • Provided by: [A].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

      Bibliography

    • 1 Manning, JC; Goldblatt, P. 2012. Proteaceae. 657 - 681. South African National Biodiversity Institute, Pretoria.
    • 2 Rep. Bot. Soc. Exch. Club Brit. Isles
    • 3 Williams, IJM. 1972. A revision of the genus Leucadendron (Proteaceae). Contr. Bolus Herb. 3: 425 - 425.

     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
    Global Tree Search
    https://tools.bgci.org/global_tree_search.php
    BGCI. 2018. GlobalTreeSearch online database. Botanic Gardens Conservation International. Richmond, U.K. Available at www.bgci.org. Accessed on 30/11/2018.
    • B Botanic Gardens Conservation International
    International Union for Conservation of Nature
    https://www.iucn.org/
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • C 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.
    • D See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use
    Proteaceae
    • E CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).