Rhabdodendron amazonicum

Description

Tree up to 15 m, usually smaller, 20 cm diam.; stem with thin hard bark, wood with anomalous secondary phloem; young branches with scattered peltate hairs. Stipules absent. Petiole 1.5-3.5 cm long, with scattered peltate hairs, not winged, terete; blade coriaceous, oblanceolate, oblong to oblong-obovate, 2-39 x 3-10 cm, apex acute, acuminate or mucronate, most frequently with acumen 2-9 mm long, gradually narrowed to cuneate base, glabrous above, with few scattered peltate hairs beneath, not rugose on surfaces; midvein plane to prominulous above, prominulous beneath, secondary veins 30-45 pairs, plane to prominulous above, prominulous beneath, anastomosing but not forming conspicuous marginal vein. Inflorescence supra-axillary and sometimes terminal panicles or occasionally reduced to racemes, 9-17 cm long, sparsely peltate pubescent becoming glabrous with age; bracts and bracteoles ovate to lanceolate, 1-2 mm long, persistent, chartaceous; pedicels 6-15 mm long, glabrescent, frequently recurved, often with 2lanceolate bracteoles; calyx-tube turbinate-campanulate, 2-4 mm long, exterior glabrescent, lobes small but distinct and apparent in young flowers only; petals 5, oblong, 7-8 mm long, sepaloid, minutely punctate; stamens ca. 45, anthers ca. 7 mm long; stigmatic surface long and linear. Fruit subglobose, 6-10 mm diam., exocarp glabrous, smooth but wrinkled when dry, mesocarp very thin, fleshy, endocarp thin, bony, fragile, with median line of fracture, glabrous within.

Distribution

Guianas: present central to eastern Amazonian Brazil: present
The Guianas and central to eastern Amazonian Brazil; many collections studied (GU: 15; SU: 7; FG: 5).

Common Name

English (Guyana, Republic of): mabua; English (Suriname, Republic of): powisitere

Phenology

Flowering .

Notes

Lemée, () reports R. macrophyllum (Spruce ex Benth.) Huber to have been found in French Guiana. So far this species, that is close to R. amazonicum, is known only from the vicinity of Manaus, Brazil.

Synonymy

Rhabdodendron amazonicum (Spruce ex Benth.) Huber in Bol. Mus. Goeldi Hist. Nat. Ethnogr. 5: 427. 1909 sec. B. Ståhl, G.T. Prance, C.A. Stace & al., 2009
  • Lecostemon amazonicum Spruce ex Benth. in Hooker’s J. Bot. Kew Gard. Misc. 5: 295. 1853
    • Holotype: Brazil, Pará, Santarém, Spruce 377.
    • Isotype: Brazil, Pará, Santarém, Spruce 377.
    • Isotype: Brazil, Pará, Santarém, Spruce 377 (P).
    • Isotype: Brazil, Pará, Santarém, Spruce 377 (MG).
    • Isotype: Brazil, Pará, Santarém, Spruce 377 (OXF).
  • =Lecostemom crassipes Spruce ex Benth. in J. Bot. Kew Gard. Misc. 5: 295. 1853
  • Rhabdodendron crassipes (Spruce ex Benth.) Huber in Bol. Mus. Goeldi Hist. Nat. Ethnogr. 5: 428. 1909
    • Holotype: Brazil, Amazonas, Manaus, Spruce 1497.
    • Isotype: Brazil, Amazonas, Manaus, Spruce 1497.
    • Isotype: Brazil, Amazonas, Manaus, Spruce 1497 (OXF).
    • Isotype: Brazil, Amazonas, Manaus, Spruce 1497 (CGE).
    • Isotype: Brazil, Amazonas, Manaus, Spruce 1497 (NY).
    • Isotype: Brazil, Amazonas, Manaus, Spruce 1497 (M).
    • Isotype: Brazil, Amazonas, Manaus, Spruce 1497 (P).
  • =Lecostemon crassipes var. cayennense Benth. in Hooker’s J. Bot. Kew Gard. Misc. 5: 296. 1853
    • Holotype: Martin s.n.
    • Isotype: Martin s.n.
  • =Rhabdodendron arirambae Huber in Bol. Mus. Goeldi Hist. Nat. Ethnogr. 5: 430. 1909
  • =Rhabdodendron duckei Huber in Bol. Mus. Goeldi Hist. Nat. Ethnogr. 5: 428. 1909
  • =Rhabdodendron longifolium Huber in Bol. Mus. Goeldi Hist. Nat. Ethnogr. 5: 430. 1909
  • =Rhabdodendron paniculatum Huber in Bol. Mus. Goeldi Hist. Nat. Ethnogr. 5: 429. 1909
    • Holotype: Brazil, Pará, Obidos, Ducke MG 8854.
    • Isotype: Brazil, Pará, Obidos, Ducke MG 8854.
    • Isotype: Brazil, Pará, Obidos, Ducke MG 8854 (US).
  • =Lecostemon sylvestre Gleason in Bull. Torrey Bot. Club 54: 608. 1927
  • Rhabdodendron sylvestre (Gleason) Maguire in Maguire et al., Bull. Torrey Bot. Club 75: 397. 1948
    • Holotype: Guyana, between Kangaruma and Potaro Landing, Gleason 211.
    • Isotype: Guyana, between Kangaruma and Potaro Landing, Gleason 211.

Specimens

CountryDateCollector + collecting numberHerbariaTypeScanDerivatives
Spruce 377P, MG, OXF
Citation: Brazil, Pará, Santarém, Spruce 377.

Specimen summary: P ()
Isotype of Lecostemon amazonicum Spruce ex Benth. Rhabdodendron amazonicum (Spruce ex Benth.) Huber
Specimen summary: OXF ()
Isotype of Lecostemon amazonicum Spruce ex Benth. Rhabdodendron amazonicum (Spruce ex Benth.) Huber
Specimen summary: MG ()
Isotype of Lecostemon amazonicum Spruce ex Benth. Rhabdodendron amazonicum (Spruce ex Benth.) Huber
Specimen summary: ()
Holotype of Lecostemon amazonicum Spruce ex Benth. Rhabdodendron amazonicum (Spruce ex Benth.) Huber Isotype of Lecostemon amazonicum Spruce ex Benth. Rhabdodendron amazonicum (Spruce ex Benth.) Huber
Feuillet 1209U, CAY
Citation: E of Pic du Grand Croissant, 40 km N of Camopi, Feuillet 1209.

Specimen summary: U ()

Specimen summary: CAY ()

Guyana, Republic ofMcDowell 3251U, US
Citation: Guyana, Republic of, Demerara-Berbice Region, Fairview Landing, E bank of Essequibo R., McDowell 3251.

Specimen summary: U ()

Specimen summary: US ()

Guyana, Republic ofter Steege et al. 399U
Citation: Guyana, Republic of, Upper Demerara Region, Mabura Hill, ter Steege et al. 399.

Specimen summary: U ()

Serv. Forestier 7406U
Citation: Route de Cayenne, km 8.5, Serv. Forestier 7406.

Specimen summary: U ()

Suriname, Republic ofLindeman & Stoffers et al. 785U
Citation: Suriname, Republic of, Lely Mts., SW plateau, Lindeman & Stoffers et al. 785.

Specimen summary: U ()

Suriname, Republic ofAcevedo-Rodriguez 6067U, US
Citation: Suriname, Republic of, Tumac Humac Mts., Acevedo-Rodriguez 6067.

Specimen summary: US ()

Specimen summary: U ()