Festuca costata Nees
  • Fl. Afr. Austral. Ill.


Cite taxon page as 'WFO (2020): Festuca costata Nees. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000870180. Accessed on: 25 Sep 2020'

Morphology

Culms 50-120(150) cm. tall, 1-3-noded, stiffly erect, terete, growing from a slightly thickened base, glabrous, smooth.

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    Spikelets 10-20 mm. long, 3-6-flowered, green but often tinged with purple, gaping, often drooping.

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    Pedicels of unequal length, filiform.

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    Densely tufted perennial.

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    Panicle up to 25 cm. long, loose and open, rarely somewhat contracted, erect or slightly drooping; branches usually 2-nate, rather slender, flexuous, branched above the middle, the lower ones fairly remote.

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    Leaf-lamina 10-60 cm. long, 2-4 mm. wide, usually involute, very rarely expanded, tapering to a setaceous point, erect or obliquely ascending, glabrous, smooth but scaberulous along the edges.

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    Anthers c. 3·5 mm. long.

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    Paleas with the keels scabrous.

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    Lemmas 6-10 mm. long, chartaceous, lanceolate, dorsally scaberulous, with the apex subobtuse, acute or very shortly mucronulate from below two minute apical lobes.

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    Glumes 3-nerved, unequal, lanceolate, acute; the inferior 3·5-6·6 mm. long; the superior 4-8 mm. long.

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    Leaf-sheaths finely striate, open, fairly tight; the older ones remaining, splitting into regular thin brown fibres, which conspicuously surround the culm-bases.

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    Ovary glabrous or pubescent at the apex.

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    Ligule up to 4 mm. long.

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    Leaf-blades 15–50 cm. long and 2–4 mm. wide, mostly involute; ligule 1–4 mm. long.

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    Densely tufted perennial; culms 60 cm. to 1 m. high, the base sub-bulbous and thickly clad in the fibrous remnants of old leaf-sheaths.

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    Spikelets 3–6-flowered, oblong, 10–20 mm. long, gaping, often tinged with pink or purple; glumes unequal, the lower 3.5–6.5 mm. long, the upper 4–8 mm. long; lemmas ± indurated, scaberulous, the lower 6.5–10 mm. long, narrowly obtuse, often with an obscure subapical mucro less than 1 mm. long; palea as long as the lemma, the keels scabrid; ovary glabrous or hairy on the top; anthers 3.5 mm. long.

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    Panicle 10–20 cm. long, loose.

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    Tufted, erect, coarse perennial 600-1700 mm high; rhizomes short and stout or long and deeply burrowed; mostly with burnt-off traces of basal sheaths; basal sheaths persistent, splitting into course fibres that form a protective layer around young shoots. Leaf blade 700-1000 x 3.5-6.0 mm; auricles absent or poorly developed; ligule 1-12 mm long. Inflorescence an open panicle, 120-240 mm long; branches usually long, lower half bare, branches and pedicels glabrous, smooth or scabrid due to scattered prickles. Spikelet 10-20 mm long, 3-7-flowered; glumes ±equal, 3-nerved, glabrous; lemma scaberulous, acute or with a minute awn up to 1 mm long, rarely longer; anthers 3.5-5.0 mm long.

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    Tough, erect perennial, rhizomatous (rhizome short and stout or long and deeply burrowed), up to 1.7 m high. Leaf blades 700-1000 mm long, 3.5-6.0 mm wide. Leaf sheaths persistent, breaking into coarse fibres that form a protective layer around young shoots; ligules 3-12 mm long. Spikelets 10-20 mm long. Panicle open, 120-240 mm long; spikelets 3-7-flowered; lemma acute or minutely awned.

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    Perennial; up to 1.7 m high; tough; erect; rhizome short and stout; or long and deeply burrowed. Leaf blades 700-1000 x 3.5-6.0 mm; leaf sheaths persistent; breaking into coarse fibres that form a protective layer around young shoots; ligules 3-12 mm long. Flowers: panicle open; 120-240 mm long; lowest branches < 1/2 length of central axis; branches flexuous or rigid; either bare in lower 1/3 or with spikelets from ± the base upwards; spikelets 10-20 mm long; spikelets 3-7-flowered; lemmas acute or minutely awned.

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    Habitat

    Moist places in high altitude mountain grassland; encouraged by frequent burning.

  • Provided by: [A].e-Flora of South Africa
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    Moist places in high altitude mountain grassland, encouraged by frequent burning.

  • Provided by: [A].e-Flora of South Africa
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    Mesic Grassland. Moist places in high altitude mountain grassland; encouraged by frequent burning.

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

    Throughout eastern Africa to Kenya. S, L, LlM, M, FS, KZN, EC.

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

     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
    Plants Of the World Online Portal - FZ
    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
    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
    • C
    Poaceae
    • D CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).