Asteraceae
Senecio

Senecio pachyrhizus O.Hoffm.

First published in Bot. Jahrb. Syst. 30: 435 (1901)
This species is accepted
The native range of this species is Cameroon to Zambia.

Descriptions

Compositae, H. Beentje, C. Jeffrey & D.J.N. Hind. Flora of Tropical East Africa. 2005

Morphology General Habit
Dwarf perennial herb with woody rootstock, precocious; rootstock 1–2.5 cm in diameter, crown often woolly and with conspicuous fibrous remnants of old leaf-bases.
Morphology Stem
Stems usually several from each crown, forming small cushions 5–16 cm high, pale green, minutely glandular-pubescent and sometimes also slightly arachnoid, glabrescent.
Morphology Leaves
Leaves all basal, oblong to elliptic, 13–25 cm long, 1–4.5 cm wide, long-attenuate into petioloid base, margins crenate-serrate, apex acute to attenuate, arachnoid-pubescent above and beneath; stem-leaves scale-like, sessile, concave, pale green or brown, oblanceolate or lanceolate, 1–2.5 cm long, 0.2–0.5 cm wide, erose-denticulate, acuminate or acute, glabrous or sparsely arachnoid beneath, the uppermost constituting the calyculus.
Morphology Reproductive morphology Inflorescences Capitulum
Capitula erect, discoid, terminal, usually solitary; involucre broadly cylindrical, brownish, 15–22 mm long, 11–18 mm in diameter, glabrous or sparsely arachnoid at base; bracts of calyculus 5–8, broadly ovate to lanceolate, 10–20 mm long, acuminate or acute, shortly erose-denticulate; phyllaries 16–25, long-attenuate, 15–22 mm long, shortly ciliate at margins near apex.
Morphology Reproductive morphology Flowers Florets
Ray florets absent; disc florets white or cream, anthers fully exserted, corolla 15.5–20 mm long, tube abruptly expanded and campanulate in upper one-sixth, shortly hairy on the narrow cylindrical lower part, lobes 2–2.5 mm long.
Morphology Reproductive morphology Fruits
Achenes when mature 11 mm long, densely long-hairy; pappus 8–22 mm long, white.
Habitat
Pyrophytic, in upland grassland, flowering about a month after fire; in large clumps or cushion-forming; 1500–2600 m
Distribution
T4 T7 U1
[FTEA]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0