Heracleum elgonense (H.Wolff) Bullock
  • Bull. Misc. Inform. Kew


Cite taxon page as 'WFO (2020): Heracleum elgonense (H.Wolff) Bullock. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000720072. Accessed on: 27 Nov 2020'

Morphology

Calyx-teeth narrowly to broadly triangular, ± 0.5–1 mm., early-deciduous.

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    Flowers white, the outermost petals of the outer partial umbels very strongly radiate, deeply cordate, (7–)8–ll mm.; inner petals elliptic-oblong, ± 2 mm., with an incurved tip.

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    Fruit broadly elliptic, ± 6–10 × 3.5–6 mm., pilose especially on the margins; stylopodia conical, exceeding the apical notch of the fruit; styles arcuate-recurved, slender, ± 2 mm.; vittae 4 dorsally, 2 on the commissure, all reaching 3/4 of the way to the base.

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    Fig. 41/1–6.

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    Umbels several, on sulcate peduncles 3–24 cm. long; rays 12–20, sulcate, densely pilose, 1.5–6.5 cm.; involucre absent or of 1–few linear to broadly oblong bracts up to ± 1 cm. long; partial umbels ± 20–26-flowered, pedicels 3–15 mm., densely furnished with rather shining hairs of diverse lengths; involucel of ± 4–14 linear bracteoles 6–13 mm. long, at least some exceeding the pedicels in young fruit.

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    Basal leaves several in a loose rosette, narrowly oblong in outline, ± 35–60 × 8–13 cm., simply pinnate with usually 6–7 pairs of roundish or bluntly deltoid, mostly ± 5 × 5–7 × 7 cm., irregularly pinnatifid leaflets (the upper often overlapping), the ultimate teeth obtuse, mucronate; indumentum ± densely pilose over the entire surface and especially the lower surface of the veins; sheaths tapering, broad, striate, ± 7.5–14 × 3_4 cm.; petiole ± 12–17 cm.; median stem leaves shortly petiolate or sessile on the sheaths, similar but usually with fewer and smaller pinnae at shorter distances apart; sheaths very broad, clasping the stem, ± 4.5–9 × 2.5–4.5 cm.; uppermost leaves commonly with the leaflets more congested, longer and narrower, with sharper teeth, these sheaths also broad and inflated.

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    Juicy perennial, 0.6–1.8 m. tall, with stout but easily broken, fistular, sulcate-striate, densely finely pilose stems; stems 1.25–1.8 cm. wide below, simple or with 1–2 ascending branches with very reduced leaves.

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     Information From

    Apiaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    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
    • B
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).