rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: A
    title: biosystematic study of the Muhlenbergia repens Complex (Poaceae)
  name:
    name part: Morden, Clifford W. (Clifford Wayne)
    name part: 1955-
    role:
      role term: creator
  name:
    name part: Bashaw, E. C.
    role:
      role term: degree committee member.
  name:
    name part: Briske, David D.
    role:
      role term: degree committee member.
  name:
    name part: Fryxell, Paul A.
    role:
      role term: degree committee member.
  name:
    name part: Hatch, Stephan L.
    role:
      role term: degree supervisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  genre: Classification.
  origin info:
    place:
      place term: xx
    date issued: 1985
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xv, 204 leaves : illustrations ; 29 cm
  abstract: A biosystematic treatment was made of the Muhlenbergia repens complex. Materials for morphological, anatomical, embryological, and cytological studies were collected from throughout the geographic region of this complex. Based on these studies six species are recognized: M. fastigiata, M. plumbea, M. repens, M. richardsonis, M. utilis, and M. villiflora. One new combination was made: M. villosa was submerged as a variety of M. villiflora. New biological descriptions are given for each of the recognized taxa. Floret vestiture was examined on each of the taxa by means of scanning electron microscopy. These investigations showed that, of the species traditionally referred to as "glabrous," three of the species examined were completely glabrous, with no vestiture of any kind, and two of the species had spikelets with minute or sparse pubescence on both lemma and palea. One species had florets with long villous macrohairs as previously described. This species and those with minute or sparse pubescence also have numerous papillae associated with the hairs. There is some evidence that the papillae represent non-functional or reduced macrohairs. A morphological examination was made on 117 populations of the complex. Phenetic and basic biostatistical techniques were used to delineate and define taxa. Principal components analysis, correlation and distance phenograms, and multivariate analysis were used to show spacial relationships among population clusters. Correlation coefficients, means, ranges, standard deviations, nested analysis of variance, and discriminant analysis were used to compare and define species. On the basis of these results, six species were defined. Detailed quantitative descriptions are given for leaf epidermal and internal anatomical characters. Characters of the abaxial epidermis and leaf transverse section were used to differentiate among the taxa. Differences between the varieties of M. villiflora were evident when leaves were viewed in transverse se…
  note: "Major subject: Range Science."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1985
  note: Includes bibliographical references (leaves 192-203).
  subject:
    geographic code: n-us---
    geographic code: n-mx---
  subject:
    topic: Grasses
    geographic: Mexico
    genre: Classification
  subject:
    topic: Grasses
    geographic: Southwest, New
    genre: Classification
  subject:
    topic: Major range science
  subject:
    topic: Grasses
  subject:
    geographic: Mexico
  subject:
    geographic: Southwest, New
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-450225
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-450225
  record info:
    record content source: TXA
    record creation date: 870504
    record change date: 20220103135021.0
    record identifier: in00000443892
    language of cataloging:
      language term: eng