Lactuca mwinilungensis G.V.Pope
  • Kew Bull. 39(1): 168 (1984)


Cite taxon page as 'WFO (2020): Lactuca mwinilungensis G.V.Pope. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000013949. Accessed on: 24 Oct 2020'

Morphology

Synflorescences paniculate, diffuse.

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    Capitula precocious, numerous, subsessile or stalked, solitary or in clusters of 2–4 spaced along the branches; capitula stalks up to c. 3 cm. long, glabrous.

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    Achenes reddish-brown, 4–5 x 1.5–2 mm., ellipsoid, somewhat compressed, not or hardly beaked, broadly-ribbed on the margins or angles, with 1–3 narrower ribs between, minutely hispidulous; pappus several-seriate, copious of fine, white barbellate setae c. 5 mm. long.

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    Involucres cylindric 8–10 x 2 mm. at time of flowering, increasing to c. 12 x 3 mm. in fruiting capitula.

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    Florets c. 5 per capitulum; corollas yellow, 11–15 mm. long, the tube narrowly cylindric and puberulus above; ligule 8–11 x 2.5–3.5 mm., lorate, glabrous.

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    Phyllaries 3–4-seriate glabrous green, often brown or purple-tinged towards the apices, ciliate above, spreading with age; the outermost ovate, less than half the length of the inner; the innermost up to c. 11 mm. long, lanceolate-lorate, ± cucullate in bud.

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    A subscapose perennial herb up to c. 70 cm. tall, from a semi-woody fusiform-turbinate rootstock.

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    Flowering stalks erect striate much-branched glabrous, or sparsely setulose below; branches mostly simple up to c. 35 cm. long, divaricate-ascending, glabrous, bracteate.

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    Leaves often reddish-purple on the margins and veins, 1–6 in a ± prostrate basal rosette, appearing after the flowers; 6–15 x 3–7 cm., broadly elliptic to narrowly obovate, rounded to obtuse at the apices, ± broadly cuneate below with a petiole-like winged midrib up to c. 2.5 cm. long, denticulate on the margins, glabrous; cauline leaves absent, or if present, sessile and bract-like, up to c. 4 cm. long, narrowly oblanceolate to narrowly triangular.

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      Bibliography

     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).
    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
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).