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Senna alata
Fabaceae FAMILY

Senna alata

Senna alata

Edibility
2/5
Medicinal
4/5

Safety & Hazards

The plant can become a weed in pastures; it is not eaten by livestock and is reported to be poisonous, especially for goats[1]. The bark is used as fish poison[1].

Cultivation Details

HabitDeciduous Shrub
GrowthFast

A plant of moister areas in the tropics, where it is usually found at lower elevations but occasionally as high as 2,100 metres. It is reported to tolerate a mean annual rainfall of 600 - 4,300mm and average yearly temperatures of 15 - 30°c. It is very susceptible to frost damage[1]. Prefers a moist but well-drained soil in a sunny position[2]. It grows well on both heavy and sandy, acid to slightly alkaline, well-drained soils[1]. This species occasionally escapes from cultivation to become naturalized, but it does not readily spread[2]. In many countries, including most countries of tropical Africa, it has become naturalized and is often considered a weed[1]. It is sometimes becoming a troublesome weed in pastures since the livestock will not eat it and a rapid spread can reduce the area available for grazing[3]. A fast-growing, but short-lived plant[1]. Plants can flower and produce fruit all year round[1]. Very tolerant of pruning, it can be cut back severely on a regular basis in order to maintain its shape[4]. Although many species within the family Fabaceae have a symbiotic relationship with soil bacteria, this species is said to be devoid of such a relationship and therefore does not fix atmospheric nitrogen[5].

Propagation

Seed - requires pre-treatment to soften the hard seedcoat and allow the ingress of water[1]. This can be done by soaking the seed in a small amount of nearly boiling water (which cools down quickly and does not cook the seed) and then soaking the seed for 12 - 24 hours in warm water. Alternatively, a small area of the seed coat can be abraded, being careful not to damage the embryo[PFAF]. Cuttings Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2026-02-20. <tropical.theferns.info/viewtropical.php?id=Senna+alata>

Pollinators

Bees

References

  1. [1]Protabase - Plant Resources of Tropical Africa. — http://www.prota.org ↩︎An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
  2. [2]Tropical Ornamentals; A Guide — Whistler. W. Arthur. · Timber Press Inc. Oregon. · 2000 · ISBN 0-88192-448-2 ↩︎An excellent little guide to some of the more commonly cultivated ornamental plants of the Tropics, often giving some information on the plants other uses.
  3. [3]Flora Malesiana Series 1 — Various · Nationaal Herbarium Nederiand, Universiteit Leiden branch · http://www.archive.org ↩︎A massive treatment of the plants of the Malaysian Archipelago. Much of it has been made available to download from the Internet
  4. [4]Tropical and Subtropical Trees - A Worldwide Encyclopaedic Guide. — Barwick. M. · Thames & Hudson, London · 2004 · ISBN 0-500-51181-0 ↩︎A superb book, very concise and well written, giving a wealth of information on 400 or more species including descriptions, habitat, cultivation details and plant uses. A wealth of colour photographs bring each plant vividly to life.
  5. [5]Nodulation Plants in GRIN Taxonomy — United States Department of Agriculture · http://www.ars-grin.gov/~sbmljw/cgi-bin/taxnodul.pl?language=en ↩︎An online database listing plants that have either positive or negative reports on root and stem nodulation with nitrogen-fixing bacteria.
  6. [6]Medicinal Plants in Papua New Guinea — World Health Organisation · 2009 · ISBN 978-92-9061-249-0 ↩︎Traditional medicinal uses of 126 species from Papua New Guinea, including information on modern research into the plants.
  7. [7]Edible Leaves of the Tropics — Martin. F. W.; Ruberte. R. M. & Meitzner. L. S. · Echo. USA. · 1998 · ISBN 0-9653360-1-8 ↩︎A terse guide, giving reasonable detail on the more common leaf crops and brief information on a wide range of lesser known plants.
  8. [8]Medicinal Plants in the South Pacific — WHO Regional Publications, Manilla. · 1998 · ISBN 92-9061-118-9 ↩︎Excellent guide to 102 medicinal herbs of the Pacific Islands, with photographs of each plant and details of their constituents, biological activities and traditional uses. A description of each plant, together with habitat and distribution is given.
  9. [9]Medicinal Plants of the Guianas — DeFilipps, R. A.; Maina, S. L.; & Crepin, J. · Smithsonian Museum · http://botany.si.edu/bdg/medicinal/index.html ↩︎A down-loadable PDF document of a book in pre-publication awaiting illustration. An excellent, if rather terse, guide to the traditional medicinal uses of the plants of the region
  10. [10]Plant Resources of Southeast Asia — http://proseanet.org/ ↩︎Lots of information on the uses of the plants of SE Asia.
  11. [11]Medicinal Plants in Vietnam — Nguyen Van Dan & Doan Thi Nhu · World Health Organisation · 1989 · ISBN 92 9061 101 4 ↩︎An excellent book, giving information on over 200 plants, their medicinal compounds and applications.
  12. [PFAF]Plants for a Future — pfaf.org ↩︎