Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Ricarda Riina; Benjamin van Ee; Alex C. Wiedenhoeft; Alfonso Cardozo; Paul E. Berry
    Date: 2010
    Source: Taxon. Vol. 59, no. 4 (Aug. 2010): p. 1147-1160.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (2.36 MB)

    Description

    Most of the arborescent Croton species in the New World were treated by Webster as belonging either to C. sect. Cyclostigma Griseb. or C. sect. Luntia (Neck. ex Raf.) G.L. Webster. The circumscription of C. sect. Cyclostigma has been treated recently. In this paper we focus on C. sect. Luntia, which was subdivided by Webster into two subsections, C. subsect. Matourenses and subsect. Cuneati. Using chloroplast trnL-F and nuclear ITS DNA sequence data, morphology and a broader sampling of additional Croton lineages, we found that the two subsections are not closely related and form distinct monophyletic groups. Substantial morphological differences support the molecular data. A taxonomic recircumscription of the two subsections, elevated to sectional level, is proposed. A key and taxonomic revision, with new synonyms, is provided for C. sect. Cuneati; together with the description of a new species from the coastal mountains of Venezuela, Croton domatifer. The new species is the only one in the genus known to possess leaf domatia. We infer that species in the Cuneati clade have lost the typical Croton caruncle, and some of them have evolved a different, specialized type of aril. We hypothesize that the arillate seeds are an adaptation to dispersal by fish in the Orinoco and Amazon river basins.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Riina, Ricarda; van Ee, Benjamin; Wiedenhoeft, Alex C.; Cardozo, Alfonso; Berry, Paul E. 2010. Sectional rearrangement of arborescent clades of Croton (Euphorbiaceae) in South America : evolution of arillate seeds and a new species, Croton domatifer. Taxon. Vol. 59, no. 4 (Aug. 2010): p. 1147-1160.

    Keywords

    Croton, molecular genetics, tree anatomy, tree morphology, Euphorbiaceae, tree identification, tree classification, tropical trees, phylogeny, wood anatomy, nucleotide sequence, Venezuela, seed dispersal, tropical woods, Croton domatifer, taxonomy, genetic analysis, arillate seeds, wood anatomy, molecular phylogeny, leaf domatia

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/37763