Life Sciences Commons^™

Biological Inventory, Natural History, And Human Impact Of Palo Alto National Battlefield, Norman L. Richard, Alfred T. Richardson

Biology Faculty Publications and Presentations

During 1993 a floral and fauna inventory was conducted on the Palo Alto National Battlefield Historic Site . Vegetational associations were mapped, and the impacts of agriculture and ranching were assessed. Attention was given to identifying endangered, threatened, or candidate species present within the site boundaries, and also species which may have been extirpated. An attempt has been made to envision where historic roadways were located and how the 1846 landscape may have appeared.

Phylogenetic Analysis Of The Zingiberales Based On RbcL Sequences, James F. Smith, W. John Kress, Elizabeth A. Zimmer

Biology Faculty Publications and Presentations

Morphological data have been used previously to construct phylogenies of the eight families of the Zingiberales one of the most widely accepted monophyletic groups of flowering plants. To provide additional support for phylogenetic relationships within the order, and placement of the order among monocots, we present a parsimony analysis of DNA sequences from the chloroplast-encoded gene, rbcL, for 21 species of Zingiberales and proposed relatives. Five analyses with equal, and differential weights were performed. All analyses resulted in the same most parsimonious tree for taxa within the Zingiberales and the immediate outgroup. The closest sister group to the Zingiberales …

The Genus Urochloa (Poaceae: Paniceae) In Texas, Including One Previously Unreported Species For The State, J. K. Wipff, Robert I. Lonard, Stanley D. Jones, Stephan L. Hatch

Biology Faculty Publications and Presentations

Urochloa is represented in Texas by three species, U. mosambicensis, U. panicoides, and U. reptans. Urochloa mosambicensis is being reported new for Texas. Urochloa panicoides has recently been reported in the state and is listed in the Federal Noxious Weed Act. Urochloa reptans has been recognized in Texas and the U. S. as Panicum reptans or, more recently, Brachiaria reptans. A key to distinguish related genera, a key to the species of Urochloa in Texas, species descriptions, and their distribution in Texas are provided.

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Urochloa está representada en Texas por tres especies, U. mosambicensis, U. panicoides y U. reptans. …

Phylogenetic Hypotheses For The Monocotyledons Constructed From RbcL Sequence Data, James F. Smith

Biology Faculty Publications and Presentations

DNA sequences for the plastid locus that encodes the large subunit if ribulose 1.5 bisphosphate carboxylase/oxygenase (rbcL) were determined for 18 species of monocotyledons in 15 families. These data were analyzed together with sequences for 60 other monocot species in a total of 52 families by the maximum likelihood method producing one, presumably optimal, topology. An additional 26 species were added (104 total monocot species) and analyzed by the parsimony method with an outgroup of 18 dicot species producing 109 trees of 3,932 steps. The rbcL data show at least moderate support for seven lineages corresponding to …

Phylogenetics Of Seed Plants: An Analysis Of Nucleotide Sequences From The Plastid Gene RbcL, James F. Smith

Biology Faculty Publications and Presentations

We present the results of two exploratory parsimony analyses of DNA sequences from 475 and 499 species of seed plants. respectively, representing all major taxonomic groups. The data are exclusively from the chloroplast gene rbcL, which codes for the large subunit of ribulose-l .5-bisphosphate carboxylase/ oxygenase (RuBisCO or RuBPCase). We used two different state-transformation assumptions resulting in two sets of cladograms: (i) equal-weighting for the 499-taxon analysis; and (ii) a procedure that differentially weights transversions over transitions within characters and codon positions among characters for the 475-taxon analysis. The degree of congruence between these results and other molecular. as …

Biology Of The Palo Alto Battlefield Site: A Summary, Norman L. Richard, Alfred Richardson

Biology Faculty Publications and Presentations

No abstract provided.