Fabaceae
Senna

Senna × floribunda (Cav.) H.S.Irwin & Barneby

First published in Mem. New York Bot. Gard. 35: 360 (1982)
This hybrid is accepted
The native range of this hybrid is Mexico. It is a shrub or tree and grows primarily in the seasonally dry tropical biome. The hybrid formula is S. multiglandulosa × S. septemtrionalis.

Descriptions

International Legume Database and Information Service

Morphology General Habit
Perennial, Not climbing, Shrub/Tree
[ILDIS]

Leguminosae, J. B. Gillett, R. M. Polhill & B. Verdcourt. Flora of Tropical East Africa. 1971

Morphology General Habit
Herbaceous undershrub, shrub or small tree usually up to 3(–4.5) m. (or ? more) high.
Morphology Branches
Branchlets glabrous, green.
Morphology Leaves
Leaves:petiole eglandular; rhachis glandular between all, or all but the topmost pair of leaflets. Stipules linear, very quickly falling off. Leaflets in normally 3–4 pairs (very rarely and sporadically 2 pairs by reduction, and in America as many as 5 pairs), lanceolate to ovate, almost symmetrical, (3–)4–11.3 cm. long, (1.6–)2–4 cm. wide, acutely and gradually tapering or subacuminate to apex, glabrous.
Morphology Reproductive morphology Inflorescences
Racemes axillary and apparently terminal, often aggregated near branchlet-ends.
Morphology Reproductive morphology Flowers Calyx
Sepals rounded at apex.
Morphology Reproductive morphology Flowers Corolla
Petals obovate to obovate-suborbicular, bright yellow, 1–1.5(–2) cm. long.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens:2 with large anthers and long filaments; 1 with medium anther and filament; 4 with rather smaller anthers and very short filaments; 3 with usually reduced empty rounded anthers and very short filaments.
Morphology Reproductive morphology Fruits
Pods subterete, brown, very shortly or not beaked, slowly dehiscent, 6.2–10 cm. long, 1–1.5 cm. in diameter, longitudinally and transversely septate within.
Morphology Reproductive morphology Seeds
Seeds many, not embedded in pulp, olive, asymmetrically obovate, 5–6 × 3.5–4 mm.; areoles absent.
Habitat
Various: grassland, wooded grassland, river-banks, papyrus-swamps, upland dry evergreen forest; also in hedges, by roadsides, and in disturbed or waste ground; 910–3200 m.
Distribution
widespread in the tropics, but probably native of America onlydoubtless an alien in East Africa K3 K4 K6 T1 T2 T3 T7 U2
[FTEA]

Sources

  • Flora of Tropical East Africa

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

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • International Legume Database and Information Service

    • International Legume Database and Information Service (ILDIS) V10.39 Nov 2011
    • http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. 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

  • World Checklist of Vascular plants (WCVP)

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. 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