Author Type

Graduate Student

Date of Award

1979

Document Type

Thesis

Publication Status

Version of Record

Submission Date

October 2026

Abstract

Systematic relationships of Ipomoea L., Merremia Dennst., and Operculina Manso were investigated. Twenty seven species were examined (20 Ipomoea, 6 Merremia, and 1 Operculina); 18 species were illustrated. Attention was given to stigma morphology and anatomy, pollen types, cotyledon attachment, and cotyledon shape. Primary emphasis however was placed on stigma morphology and anatomy as taxonomic characters. Material examined differed in three respects: 1) division of the stigma into two, three, or superficially four parts; 2) degree to which each part of the stigma was lobed; 3) shape, relative size and density of papillae and pattern of arrangement of papillae on the lobes. A sequence of stigma types was proposed and a species which does not fit the scheme was discussed. Correlations between observed stigmatic surfaces and pollen types were considered. Cotyledon shape and attachment were also examined in 25 species (21 Ipomoea, 6 Merremia, and 1 Operculina). Segregation of Merremia tridentata (L.) Hall. f. is suggested due to differences from nominate Merremia in pollen type, stigma morphology, and the nature of the cotyledons.

Extent

58 p.

Comments

FAU Electronic Theses and Dissertations Collection|Thesis (M.S.)--Florida Atlantic University, 1979.|Charles E. Schmidt College of Science|FAU Electronic Theses and Dissertations Collection

Identifier

FADT13992

Format

pdf

Download

Share

COinS