Pithecellobium saman (Jacq.) Benth.
  • rain tree


Cite taxon page as 'WFO (2021): Pithecellobium saman (Jacq.) Benth. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000179713. Accessed on: 18 Oct 2021'

General Information

A large, spreading, unarmed tree, the branchlets aureo-pubescent becoming glabrate, sparingly lenticellate. Leaves large, twice-compound, the pinnae 2-6 pairs, each pinna with 2-8 pairs of leaflets (terminal pinnae usually with the more numerous leaflets); petioles mostly 4-6 cm. long, canescent- or yellowish-tomen- tose, somewhat sulcate above; primary rachis (petiolar extension) 4-6 cm. long, similar to the petiole, bearing at or just below insertions of each pair of pinnae a small, sessile, subcupuliform, laterally extended gland; axis of the pinna like the primary rachis except the glands between (slightly below) insertions of the leaflet pairs smaller; leaflets asymmetrically ovate, oblong or obovate, up to about 4 cm. long and 2 cm. wide, obtuse or rounded apically, obliquely obtuse or rounded basally, puberulent or subglabrous and lustrous above, yellow-tomentulose below; stipules caducous. Inflorescence of 1 to few pedunculate umbels axillary and sub- terminal on the branchlets; peduncles at anthesis 4-8 cm. long, tomentose, sulcate; umbels congested, the pedicels mostly 1-3 mm. long (except central flower sessile.); bracts (except central flower) lanceolate, about 3 mm. long. Flowers whitish or pinkish, dimorphic; central (sessile) flower of umbel larger, persistent, its calyx campanulate, with 10 teeth, about 5 mm. long and 3-4 mm. wide, its staminal column gross and thick but the many stamens relatively short, its ovary ovulate but comparatively underdeveloped, this flower surrounded by 5 oblanceolate bracts about 5 mm. long; remaining (pedicellate) flowers first to fall, their calyx funnel- form, about 5 mm. long and only 1-2 mm. wide, 5-toothed, aureo-tomentose; their corolla funnelform, about 1 cm. long, valvate, aureo-pubescent apically only; their stamens about 3.5 cm. long, the staminal-tube included; their ovaries sessile, subglabrous except pubescent at base of style, the style becoming more or less glabrous apically and about equalling the stamens. Legume linear or linear-oblong, reported as much as 20 cm. long and 2 cm. wide, straight or slightly curved, glabrate, the valves thick, the margins prominent, indented and septate between the seeds, the seeds transverse.

  • Provided by: [C].Flora de Panama
    • Source: [
    • 1
    • ]. 

    Habit

    tree

  • Provided by: [C].Flora de Panama
    • Source: [
    • 1
    • ]. 

    Distribution

    Mexico, Central America, South America: naturalized in West Indies and Old World tropics.

  • Provided by: [C].Flora de Panama
    • Source: [
    • 1
    • ]. 

    Other Local Names

    NameLanguageCountry
    rain tree

     Information From

    Fabaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • B Missouri Botanical Garden
    Flora de Panama
    http://www.tropicos.org/Project/PAC
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • C Missouri Botanical Garden