Bactris horridispatha Noblick ex A.J.Hend., Fl. Neotrop. Monogr. 79: 98 (2000)

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Map uses TDWG level 3 distributions (
Brazil Northeast present (World Checklist of Arecaceae)B
Brazil (Bahia). Restinga forest or lowland rain forest on non-flooded forest, at 20-100 m elevation. (Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000)A


  • Bactris horridispatha is diagnosed by its to 7 cm long, yellowish brown leaf spines, regularly arranged pinnae, and 1-5, thick, short rachillae. It is named for the dense covering of leaf spines. (Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000)A

Common Name

  • Brazil: baralhá, marajá, tucum, tucum amarelo. (Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000)A


  • Stems cespitose, 1-6 m tall, 1.5-3 cm diam., spiny on internodes.
    Leaves 3-8; leaf spines scattered or clustered, yellowish brown or dark brown, darker at base and apex, tomentose, somewhat flattened, to 7 cm long, dense on sheath and lateral surfaces of petiole, fewer on abaxial surface of rachis; sheath 25-30 cm long, sheath, petiole, and rachis brown-tomentose; ocrea to 10 cm long; petiole 12-70 cm long; rachis 0.6-1.5 m long; pinnae 15-26, regularly arranged, spreading in the same plane, lanceolate; middle pinnae 29-66 x 3-8 cm.
    Inflorescences interfoliar; peduncle 11-27 cm long, slightly curved, not spiny; prophyll 10-16 cm long; peduncular bract 23-46 cm long, densely covered with black, brown or yellow, flattened, appressed spines to 3 cm long; rachis 6-14 cm long; rachillae 1-5,5-11 cm long, 2-5 mm diam.; triads irregularly arranged among paired or solitary staminate flowers; staminate flowers not seen; pistillate flowers 5-10 mm long; calyx tubular, 1-5 mm long; corolla tubular, 4-10 mm long; staminodes minute or absent; fruits 2.3-2.5 cm diam., ellipsoid, purple-black, with brown scales; mesocarp juicy; endocarp obovoid, the sterile pores displaced longitudinally; endocarp fibers numerous, with juice sacs attached; fruiting perianth with regularly lobed, 0.5 cm long calyx and regularly lobed, 1 cm long corolla, without staminodial ring. (Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000)A


    A. Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000
    B. World Checklist of Arecaceae