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Showing 1 to 3 of 3 for “"pappus"”.
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A Method of Coordinatizing an Affine Geometry
… that the points of any affine plane with the Pappus property are in one-to-one correspondence with the set of all ordered pairs of elements of a field. Irving Kaplansky notes that a vector space, which may be described a n-tuples of the elements of a field, may be used to further demonstrate …
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VARIATION BETWEEN PERIPHERAL AND CENTER ACHENE MORPHOLOGY AND ATTRIBUTES OF ACHENE GERMINATION IN THE INVASIVE SPECIES, <i>CENTAUREA MELITENSIS</i>
… by measuring mass, fruit length, fruit width, pappus length, pappus width, and elaiosome features. Temperature response patterns were evaluated by exposing peripheral and center achenes to temperatures ranging from 5 C to 30 C and measuring germination. Tendency of different achene types to …
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A biosystematic study of the Lasthenia californica complex (Asteraceae)
… a strong correlation among flavonoid profiles, pappus morphology and isozyme patterns. A long term study at Jasper Ridge suggests that the spatial distribution of pigment types along several transects has remained essentially constant over a period of 10 years. Indices of genetic differentiation …