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|Title:||The Acacia Berlandieri Species Group: Armed New World Members of Subgenus Aculeiferum (Fabaceae) With Distributions Restricted North of the Isthmus of Tehuantepec, Mexico|
|Author(s):||Glass, Catherine Elizabeth|
|Doctoral Committee Chair(s):||David Seigler|
|Department / Program:||Plant Biology|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
|Abstract:||Data from all 15 non-hybrid ingroup and seven outgroup species for 24 discrete morphological characters were analysed by unconstrained simultaneous parsimony analysis using PAUP* 4.0, both with and without hybrids. For these analyses with the branch-and-bound algorithm, the character states were assumed to be unordered, and character states were weighted equally. This resulted in 54 optimal 70-step trees in the analysis without hybrids. The presence of a unique synapomorphy (petiolar glands that are sessile or slightly raised), weakly supported monophyly of the A. berlandieri group. In the strict consensus tree there was a trichotomy of a single species, a ten species clade and a four species clade. Synapomorphies that support the clade of ten species include: possession of foliar short shoots (unique), legume margins strongly constricted, and possession of axillary inflorescences. Synapomorphies that support the clade of four species include possession of petiolar glands that are sessile (unique) and lignescent legumes. Descriptions, including drawings, distribution maps, updated nomenclature, synonomy, determination of type specimens, and exsiccatae, were provided for each species.|
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003.
|Date Available in IDEALS:||2015-09-28|