Harvard University Herbaria

Morphological studies

Morphological studies will be undertaken using sectioned material (see Pfister 1979, Pfister 1993). These studies generally involve freezing microtome sections appropriately stained and viewed with bright field or Nomarski optics. Developmental studies will be based on fresh or preserved material sectioned with a freezing microtome or on paraffin or plastic embedded material. Photomicrographs will be made as well as drawings to illustrate diagnostic characters. In addition we will assemble digital images of relevant morphological characters for comparison. These will be especially important in facilitating accurate specimen identification (see below, "Dissemination of Results").