Nutation (botany) flowers to open or close by movements which resemble the simple nutation of dorsiventral organs. Thus, the tulip, crocus, and other vernal flowers are very sensitive to changes in temperature. The crocus can perceive a change of 0.5°C (0.9°F), and will respond to a change of 20°C (36°F) in two minutes. Nutation (botany) Nutation is the bending movements executed by some plant organs, such as stems, leaves, roots, etc., by which the part is inclined successively in various directions. Nutations are due to the unequal rate of growth of different sides of the organ, an inequality which, so far as
Systematic Botany Expanded. Systematic Botany Systematic Botany is a peer-reviewed scientific journal covering the study of systematic botany. It is published quarterly by the American Society of Plant Taxonomists. According to the "Journal Citation Reports", the journal has a 2010 impact factor of 1.897. "Systematic Botany" was established in spring 1976 under founding editor-in-chief William Louis Culberson (Duke University). The current editor-in-chief is James F. Smith (Boise State University). The American Society of Plant Taxonomists also publishes the peer-reviewed taxonomic monograph series, "Systematic Botany Monographs" since 1980. "Systematic Botany" is abstracted and indexed in Agricola, Agris, BioOne, PubMed, Scirus, and Science Citation