Bactris chaveziae A.J.Hend., Fl. Neotrop. Monogr. 79: 49 (2000)

Primary tabs

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Boliviapresent (World Checklist of Arecaceae)B
Brazil Northpresent (World Checklist of Arecaceae)B
Perupresent (World Checklist of Arecaceae)B
Peru (Cusco, Madre de Dios, Pasco), Brazil (Acre), and Bolivia (La Paz, Santa Cruz); lowland rain forest on terrafirme, at 280-500 m elevation. (Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000)A

Discussion

  • Bactris chaveziae is diagnosed by its Iinear-lanceolate or sigmoid pinnae, irregularly arranged in clusters; staminodial ring, and purple-black fruits. Henderson (1995) recognized three varieties of Bactris concinna, of which this was one (B. concinna var. sigmoidea). These are given specific rank here, because there appear to be consistent differences among the three, and few, if any, intermediates. A new name has been given to this taxon because B. sigmoidea Burret already exists. (Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000)A

Common Name

  • Peru: chonta. (Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000)A

Description

  • Stems cespitose, 0.7-4 m tall, 1.5-2 cm diam.
    Leaves 6-10; leaf spines scattered, terete, yellowish brown, darker at base and apex, to 12 cm long, on petiole and rachis; sheath 12-15 cm long, fibrous on margins; ocrea to 12 cm long; petiole 70-80 cm long; rachis 50-76 cm long; pinnae 8-19 per side, linear-lanceolate or sigmoid, irregularly arranged in clusters, spreading in different planes, with a metallic sheen on drying; middle pinnae 21-35 x 2.5-5 cm (apical pinna usually wider than the others).
    Inflorescences interfoliar; peduncle to 15 cm long, straight, not spiny; prophyll not seen; peduncular bract to 25 cm long, densely covered with spreading, yellowish brown spines to 1 cm long; rachis absent; rachilla 1-2, to 5 cm long, at anthesis glabrous; triads regularly arranged; staminate flowers 4-6 mm long; sepal lobes 1 mm long; petals 4-6 mm long; stamens 6; pistillode absent; pistillate flowers 2-3 mm long; calyx tubular, to 2 mm long; corolla tubular, 2-3 mm long; staminodial ring obscure, adnate to corolla, seldom free; fruits 2-3.5 x 1-2 cm, congested on rachillae, ellipsoid, purpleblack, brown-tomentose; mesocarp juicy; endocarp ellipsoid, the sterile pores displaced longitudinally, the fertile pore displaced latitudinally; endocarp fibers free, numerous, with juice sacs attached; fruiting perianth with small, lobed calyx and much longer, scarcely lobed corolla, with staminodial ring. (Henderson, A.J., Bactris (Palmae) in Flora Neotropica Monographs 79. 2000)A

Bibliography

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