@ARTICLE{TreeBASE2Ref17518, author = {Beryl B. Simpson and Jennifer A. Tate and Andrea Weeks}, title = {On the value of the genus Hoffmannseggia (Caesalpinieae: Caesalpiniodeae: Leguminosae): Phylogeny and character evolution}, year = {2004}, keywords = {}, doi = {}, url = {}, pmid = {}, journal = {Systematic Botany}, volume = {}, number = {}, pages = {}, abstract = {For the last 150 years, Hoffmannseggia has been variously entangled with Caesalpinia and Pomaria. The confusion surrounding generic limits stemmed from the emphasis placed by workers on plant habit (herbaceous or subshrubby versus trees or stout vines) and armament (glandular trichomes versus spines). Traditionally, Hoffmannseggia consisted of herbaceous or subshrubby perennials that lack spines and usually bear glandular trichomes on portions of the vegetative surfaces. However, the lack of correspondence of other characters such as flower shape, fruit type, and sepal persistence with habit and armament led to the continual realignment of various species. Here, we show that many systematists of the mid-nineteenth century were misled by convergence in habit and trichome type. Our data, drawn from nuclear ITS, chloroplast trnL-trnF, and rbcL sequences show that, contrary to previous conclusions, Hoffmannseggia forms a monophyletic group supported with several morphological synapomorphies and that it is not closely related to either Caesalpinia or Pomaria. The species of the genus exhibit interesting patterns of character change and a complex phylogeny involving one documented case and other suspected cases of hybridization. We also make the new combination Hoffmannseggia pumilio.} }

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