Kew Bulletin

, Volume 67, Issue 4, pp 789–796 | Cite as

Steinbachiella (Leguminosae: Papilionoideae: Dalbergieae), endemic to Bolivia, is reinstated as an accepted genus



The monospecific genus Steinbachiella Harms is reinstated as a distinct genus in Leguminosae, tribe Dalbergieae, based on recent collections from Bolivia. The fruits are samaras similar in appearance to those of the related genus Machaerium Pers. A combined morphological and molecular phylogenetic analysis suggests that the distally winged fruit of Steinbachiella and most Machaerium species is homologous. Nevertheless, Steinbachiella is distinct in having a unique suite of morphological characters that includes flowers in 1– 4-flowered racemes, the corollas yellow and totally glabrous, the standard petal with a deeply emarginate apex, long-stipitate ovaries and a samaroid fruit. In addition, in molecular analyses the genus is placed as sister to Machaerium and not nested within it.


Fabaceae Machaerium 


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Copyright information

© The Board of Trustees of the Royal Botanic Gardens, Kew 2012

Authors and Affiliations

  1. 1.Royal Botanic Gardens, KewRichmondUK
  2. 2.Department of Plant SciencesUniversity of Oxford, South Parks RoadOxfordUK
  3. 3.Honorary Research Associate, Royal Botanic Gardens, KewRichmondUK
  4. 4.Department of Plant Sciences and Plant PathologyMontana State UniversityBozemanUSA

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