01960nam a2200181 a 450000100080000000500110000800800410001910000170006024500640007726000920014130000260023350000200025952014440027965000120172365000120173565000180174765000130176511632912014-07-23       1984    bl uuuu  m   00u1 u    #d1 aALLEM, A. C.  aA revision of manihot section Quinquelobae (Euphorbiaceae).  aReading : University of Reading, Department of Botany, Plant Science Laboratoriesc1984  a2 v.cTese Doutorado.  aTese Doutorado.  aVegetative Morphology; Growth-form; Growth-habit; Roots; Stems; Leaves; Leaf Micromorphology; Petiole-anatomy; Leaf-venation; Leaf-epicuticular wax-patterns; Leaf-epidermal sculpturing-patterns; Floral Morphology; Inflorescences; Floral bracts; Floral buds; Male flower; Female flower; Fruits; Seeds; Cytology; Material and methods; Results; Preliminary taxonomic discussion; Palynology; Material and methods; Results; Preliminary taxonomic discussion; Reproductive biology; Elementary background on anthecology; Accounts on pollination for the Euphorbiaceae; Accounts on pollination in Manihot; Report of a specific observation on Manihot grahamii; Natural hybrids in Manihot; The chances of introgression taking place in Manihot; Chances of hybrid speciation taking place in Manihot; Inbreeding as a second class genetic system; Optimized evolution and the sucessful plant species; Ecology; Distribution and size of the populations; Fire; Habitats; The case of rare species; Plant spacing; Seed germination and seedling establishment; Predation; Population size in the light of a self-control device; Speciation and Evolution; The species concept in Manihot; The morphological species and subjectivity; Infraspecific variation and genecology; The role of variation in the formation of new species; Infraspecific differentiation in Manihot; The unit of plant evolution; Taxonomic Synthesis; Taxonomic treatment of the species; Appendices.  aCassava  aManihot  aEuphorbiaceae  aMandioca