Hydrochorea marginata var. panurensis (Spruce ex Benth.) 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

    Hydrochorea marginata var. panurensis (Spruce ex Benth.) Barneby & J.W.Grimes

  • Type

    ". . . in silvis ‘Gapó’ ad flumen Uaupés prope Panuré, prov. do Alto Amazonas: Spruce n. 2425." — Holotypus, K(herb. bentham.)! = NY Neg. 2014; isotypi, †B = F Neg. 1214!, NY!, P!

  • Synonyms

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    Arthrosamanea panurensis (Spruce ex Benth.) Pittier

  • Description

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    Variety Description - Pinnae of all lvs 1-jug.; capitula 17—26-fld; bracts 2-3.5 mm; pedicel of lower peripheral fls a little stouter than in var. marginata, 6.5-13 x 0.25-0.4 mm; calyx glabrous overall, 4-7(-8) x 2-3(-3.7) mm, the teeth 0.8-2.6 mm; corolla 7—11 (—12) mm, glabrous or puberulent at tip of lobes, these often unequal, 0.8-4.5 x 1.7-2.3 mm; stamens (14—)16—24, the stemonozone 1.4-2.5 mm, the tube 3.5—6.5 mm; calyx of central fl(s) 2.5—4 x 2—3 mm, the corolla 8-23 mm, the androecial tube (9)11-28 x 2-3 mm. [Key] "Pedicel of lower peripheral fls 6.5-13 mm; pinnae consistently 1-jug. in all lvs;"

    Distribution and Ecology - In seasonally flooded habitats of var. marginata, and like it mostly, perhaps exclusively, on blackwater, below 250 m, nearly confined to the Río Negro basin in T. F. Amazonas, Venezuela, and state of Amazonas, Brazil, downstream in typical form to Barcelós and intergradient to var. marginata as far as Río Cueiras NW of Manaus (not mapped), E just into S state of Roraima (Río Cheriuini) and W to the upper Vaupés and Apaporis in Vaupés, Colombia, in Venezuela not known from N of the mouth of Río Atabapo. — Map 3. — Fl. V-X. [Key] "range as given above, but in Venezuela N only to the mouth of Río Atabapo in lat. 4°N.............3b. var. panurensis"

  • Discussion

    One leaf of Colella 2161 (NY) from Río Casiquiare has two pairs of pinnae suggesting passage into var. scheryi.

  • Distribution

    Amazonas Brazil South America| Amazonas Venezuela South America| Roraima Brazil South America| Vaupés Colombia South America| Amazonas Venezuela South America|