Macrosamanea discolor var. arenicola (R.S.Cowan) Barneby & J.W.Grimes

  • Authors

    Rupert C. Barneby

  • Authority

    Barneby, Rupert C. & Grimes, James W. 1996. Silk tree, guanacaste, monkey's earring: a generic system for the synandrous Mimosaceae of the Americas. Part I. Abarema, Albizia, and allies. Mem. New York Bot. Gard. 74: 1-292.

  • Family

    Mimosaceae

  • Scientific Name

    Macrosamanea discolor var. arenicola (R.S.Cowan) Barneby & J.W.Grimes

  • Type

    "VENEZUELA: Amazonas: ... on right bank of Río Pacimoni 50 km above mouth, alt. 100-140 m . . . 7 Feb 1954, Bassett Maguire, John J. Wurdack & George S. Bunting 37568 ..." — Holotypus US 2281823,4!; isotypus, NY!; paratypus, Maguire et al. 37264, NY!, US!

  • Synonyms

    Pithecellobium arenicola R.S.Cowan

  • Description

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    Variety Description - Characters as given in key to varieties. [Key: "Lfts venulose beneath, but smooth and veinless above, their midrib centric or forwardly displaced to divide blade ±1:2; peduncles all or almost all disposed in short terminal or subterminal pseudoracemes and only 4-15mm long; fls on the average smaller, the calyx (6.5-)7-13 mm, the corolla 15-24 mm."]

    Distribution and Ecology - In savanna on white sand, below 150 m, vicariant north and southward with var. discolor on the Orinoco-Negro divide in SW T. F. Amazonas, Venezuela, on the middle Atabapo, Siapo, and Pacimoni rivers. — Map 48. — Fl. II-V. [Key] "local on both sides of the Orinoco-Negro divide in SW T.F. Amazonas, Venezuela, and in Amazonian caatinga near S. Gabriel do Cachoeira on the upper Río Negro in Amazonas, Brazil, apparently confined to white sand savanna and savanna-forest ecotone......5b. var. arenicola"

  • Distribution

    Amazonas Venezuela South America| Amazonas Brazil South America|