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Eperua falcata

(Apa, Apa Roxo, Baboen Walaba, Bioudou, Biouolou Wata, Bootlace Tree, Bylhout, Carota, Itoeli Walaba, Mahomillo Negro, Sand Wallaba, Soft Wallaba, Tamoeno Pale-O, Wallaba, Wapa Gras, Wapa Huileux, Waraba, White Wallaba, Zwarte Walaba)

Conservation Status

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Population Analysis

  • For the 835,580 species in the Class Magnoliopsida (Dicotyledons), we average 4.30 observations each in our database; for the Mahomillo Negro, we have 177 observations. Compared to other species in this Class, this species is moderately common.
  • A two-sample t-test can be used to determine whether the trend in observations of the Mahomillo Negro is the same as the trend in observations of Magnoliopsida. Is this species just as common, as a proportion of all observations, as it once was? The answer is no, changes in observation rate of this species significantly differ from changes in observation rate of its Class. (t=11.749, p<0.001)
  • How do observation rates of the Mahomillo Negro differ from those of Magnoliopsida? To answer this, we examined the percentage of observerations for Magnoliopsida that were observations of the Mahomillo Negro each year. We then correlated this percentage with observation year. If observations of the Mahomillo Negro are becoming more common relative to other species of Magnoliopsida, the correlation should be positive, but if it is becoming less common, the correlation should be negative. In fact, the correlation is negative (r=-.46), with a negative slope (m = -.001), suggesting that the Mahomillo Negro may be in decline relative to other species of Magnoliopsida. This correlation is statistically significant. (F = 9.72, p<.05)
  • The scatter chart to the right shows the percentage of all observations for Magnoliopsida each year that were observations of the Mahomillo Negro.

Taxonomy

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Unambiguous Synonyms:

  1. Dimorpha falcata (Aubl.)Sm.
  2. Panzera falcata (Aubl.)Willd.

Notes:

Name Status: Accepted Name. Latest taxonomic scrutiny: Zarucchi J.L., 1993

Place of publication: Hist. pl. Guiane 1:369, t. 142. 1775

Name verified on 03-Apr-2007 by ARS Systematic Botanists. Last updated: 03-Apr-2007

Physical Description

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Family Fabaceae:

The Fabaceae are herbs, vines, shrubs, trees, and lianas found in both temperate and tropical areas. They comprise one of the largest families of flowering plants, numbering 630 genera and 18,000 species. The leaves are stipulate, nearly always alternate, and range from bipinnately or palmately compound to simple. The petiole base is commonly enlarged into a pulvinus that commonly functions in orientation of the leaves (sometimes very responsively, as in the sensitive plant, Mimosa pudica). The flowers are usually bisexual, actinomorphic to zygomorphic, slightly to strongly perigynous, and commonly in racemes, spikes, or heads. The perianth commonly consists of a calyx and corolla of 5 segments each. The androecium consists of commonly 1- many stamens (most commonly 10), distinct or variously united, sometimes some of them reduced to staminodes. The pistil is simple, often stipitate, comprising a single style and stigma, and a superior ovary with one locule containing 2-many marginal ovules. The fruit is usually a legume, sometimes a samara, loment, follicle, indehiscent pod, achene, drupe, or berry. The seeds often have a hard coat with hourglass-shaped cells, and sometimes bear a u-shaped line called a pleurogram. [Carr]

Subfamily Caesalpinioideae:

Mostly trees or shrubs. Leaves mostly pinnate, sometimes bipinnate, rarely apparently simple. Corolla usually showy, zygomorphic, the petals imbricate, posterior (upper or banner) petal innermost in bud. Stamens 10 or fewer, distinct, usually not showy, some commonly reduced to staminodes. Pollen released in monads. Seeds with u-shaped line (pleurogram) usually lacking. [Carr]

Habit: Tree • Climbing: Not Climbing

Distribution

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Range and Population

Native: .

Reproduction

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Duration: Perennial

Similar Species

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Members of the genus Eperua:

There are approximately 31 species, subspecies, varieties, forms, and cultivars in this genus: E. bijuga (Fava Do Matto) · E. bijuga f. typica · E. duckeana · E. falcata (Apa) · E. glabra · E. glabriflora (Muirapiranga) · E. grandiflora (Ituri Wallaba) · E. grandiflora grandiflora · E. grandiflora guayanensis · E. grandiflora guyanensis · E. grandiflora subsp. guyanensis · E. hohenkerkii · E. janmanii · E. jenmani · E. jenmanii (Concha De Suela) · E. jenmanii jenmanii (Concha De Suela) · E. jenmanii sandwithii (Concha De Suela) · E. jenmanii subsp. sandwithii · E. leucantha (Acana) · E. obtusata · E. oleifera · E. oleifera var. campestris · E. oleifera var. oleifera · E. praesagata · E. purpurea (Iebaru) · E. rubiginosa (Apa) · E. rubiginosa var. grandiflora · E. rubiginosa var. rubiginosa · E. schomburgkiana (Ituri Wallaba) · E. sp. · E. venosa

Bibliography

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  • Cowan, R. S. 1975. A monograph of the genus Eperua (Leguminosae: Caesalpinioideae). Smithsonian Contr. Bot. 28:26–28.
  • Steyermark, J. A. et al., eds. 1995–. Flora of the Venezuelan Guayana. (F VenGuay)

More Info

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Notes

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Contributors:

  • Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
  • Global Biodiversity Information Facility. Accessed December 02, 2007. http://www.gbif.org Mediated distribution data from 3 providers.
  • ILDIS World Database of LegumesNov 10, 2005.
  • USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN) [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland. URL (May 04, 2008)

Data Sources:

Accessed through GBIF Data Portal December 02, 2007:

Identifiers:

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Last Revised: May 16, 2008