Master's Theses

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Date of Award

Spring 1964

Degree Name

Master of Science (MS)

Department

Biology

Advisor

Howard C. Reynolds

Abstract

Epidermal patterns of the widest portion of the leaf blade of seven grass tribes were studied. These included 22 genera and 30 species which were collected in northwest Kansas during 1963. Epidermal patterns were studied mainly by the peel technique, using acetone and cellulose acetate film, and the clearing technique. A detailed study was made of both the adaxial and abaxial surfaces, although photomicrographs were made of only the abaxial surface, because this was found to have more diagnostic characters than the adaxial surface. General epidermal cell elements, bicellular microhairs, silica cells, cushion hairs, macro-hairs, papillae, prickle-hairs, and subsidiary cells of the stomatal apparatus were studied in detail as well as the arrangement of the diagnostic characters. The silica cells, bicellular micro-hairs, and the subsidiary cells of the stomatal apparatus were found to be the most useful diagnostic characters for this classification. The arrangement or pattern of these characters can be of great importance toward a more natural phylogenetic classification of the Gramineae.

Rights

Copyright 1964 Marvin Lee Jeffers

Comments

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