Scleria pergracilis (Nees) Kunth
  • Enum. Pl.


Cite taxon page as 'WFO (2020): Scleria pergracilis (Nees) Kunth. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000552165. Accessed on: 23 Feb 2020'

General Information

Annuals. Rhizomes absent. Culms tufted, erect, 11-30 cm tall, ca. 0.5 mm wide, 3-angled, sulcate, glabrous. Leaves basal and cauline, sheathing; contraligule rounded to obtuse; leaf blade capillary, ca. 1 mm wide. Involucral bracts setaceous, basal one to 0.6 cm and shorter than spikelet cluster; bractlets glumelike. Inflorescences spicate, 2.5-8.5 cm, formed by clusters of 2 or 3 spikelets each separated by 2-17 mm. Spikelets mostly bisexual, ovoid, 3-4 mm, rarely basal one unisexual with a single male flower. Glumes ovate, keeled, both sides of midvein membranous with reddish brown lines, apex mucronate; basal 2 glumes empty; middle glume with a female flower; apical 1 or 2 glumes with a male flower. Male flowers: stamens 3; connective apex protruding, forming a thin tip. Female flowers: stigmas 3. Disk obscure. Nutlet white, subspherical, ca. 1 mm in diam., slightly 3-sided, transversely rugose, base with a brown stalk, apex tipped. Fl. and fr. Aug-Oct. 2n = 10.

  • Provided by: [C].Flora Of CHina @ efloras.org
    • Source: [
    • 7
    • ]. 

    Diagnostic Description

    This annual species may be distinguished from the perennial S. dieterlenii which it resembles in its aerial parts, by the lack of a rhizome or any other perennating stem, by its broadly V-shaped lamina-profile (the lamina-profile of S. dieterlenii is flanged-V- shaped); by its glabrous glumes and by its grey, strongly tuberculate-verrucose achenes with the crests of the tubercles lighter grey.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 9
    • ]. 

    Morphology

    Slender annual 45 cm. high;

  • Provided by: [D].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
    • ]. 

    Leaves 1–2 mm. wide

  • Provided by: [D].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
    • ]. 

    Inflorescence a simple 5–13 cm. long spike of 5–30 glomerules

  • Provided by: [D].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
    • ]. 

    Annual, caespitose. Culms 0.13-0.38 m tall, glabrous. Leaves 1-2 mm broad, glabrous or the sheaths minutely pilose towards the truncate or concave mouths. Inflorescence unbranched, 20-65 mm long, or with one short basal branch bearing a single glomerule. Glomerules 2-13-(18) of 1-7 sessile or subsessile spikelets. Bracts acuminate, shorter than or slightly exceeding the spikelets. Spikelets 4-5 mm long. Glumes 2.5-3.5 mm long, glabrous, mucronu- late, pale with red-brown striae, or wholly reddish-brown. Achene subglobose, 1.4-1.8 x 1.2-1.6 mm, glabrous, trabeculate to tuberculate-verrucose, grey possibly with brown stipe (only immature achenes seen).

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 9
    • ]. 

    Ecology

    Seasonally wet and swampy places.

  • Provided by: [D].Plants Of the World Online Portal - FWTA
    • Source: [
    • 1
    • ]. 

    Habitat

    Open seasonal bogs in neutral or acid soil.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 9
    • ]. 

    Distribution

    This species is known in Southern Africa from a single gathering made near Dundee in Natal in 1944. The gathering was identified as var. brachystachys by Nelmes in 1955. Robinson expressed reservations about the validity of maintaining var. brachystachys. I am unable to express an opinion since the species is unknown to me in the field and 1 have seen very little material. The species is widely distributed in Africa, India, Sri Lanka and New Guinea and var. brachystachys is recorded outside the FSA area from Zimbabwe and Tanzania.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 9
    • ]. 

      Bibliography

     Information From

    Cyperaceae
    • 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
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Missouri Botanical Garden
    Plants Of the World Online Portal - FWTA
    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
    • D The Trustees of the Royal Botanic Gardens, Kew
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).