The Primrose and Darwinism Author:Edward] [Bell General Books publication date: 2009 Original publication date: 1902 Original Publisher: Grant Richards Subjects: Evolution Fertilization of plants Plants Primroses Primulaceae Nature / Plants Science / Life Sciences / Biology / General Science / Life Sciences / Botany Science / Life Sciences / Evolution Notes: This i... more »s a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. Excerpt: The word " heterostyled," which will be met with in the following pages, means that flowers of one and the same species, as the common primrose and cowslip, have each their styles of different lengths in different flowers. These different forms grow on different roots. Such flowers are also called dimorphic -- of two forms -- as having flowers differing in the relative position of their stigmas and anthers. When there are three different lengths of styles and stamens, in different flowers of the same species, such plants are said to be trimorphic, or of Fig. I. Long-styled form of Short-styled form of primrose. primrose. three forms. The flowers generally of the primrose tribe (primulaced) are heterostyled and dimorphic. Some species are homostyled, a term used to denote that they exist only under a single form. This heterostylism is shown in the accompanying diagram (Fig. 1). There are few observers of flowers but know that there are two different forms in the primrose. Some of the flowers have their stigmas -- which are the termination of the styles -- at the mouth of the corolla tube. These are commonly called " pin-eyed "; their anthers are midway down the tube. These are the long-styled flowers. Others, on the other hand, have their anthers at the mouth of the corolla tube and their stigmas halfway down the tube. These are commonly called " thrum-eye...« less