GONZALEZ Ana Maria
Colleters in Turnera and Piriqueta (Turneraceae).
GONZALEZ ANA MARIA
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
Ed. The Linnean Society of London.
Año: 1998 vol. 128 p. 215 - 228
ABSTRACT González, A. M. 1997. Colleters in Turnera and Piriqueta (Turneraceae). The anatomy of colleters was examined by light and scanning electron microscopy in 25 species of Turnera and 9 species of Piriqueta. According to their morphology, four categories of colleters have been recognized: standard, sessile, lachrimiform and trochleariform, which differ in the shape and length/width ratio. All of them have a similar anatomy: they consist of an axis of parenchimatous cells, sheathed by a palisade epidermis. The standard type is the most widespread in the studied taxa while the lachrimiform one was only found in the Piriqueta species with setiform glandular hairs, and the trochleariform one only appears in T. diffusa. The sessile type is considered to be a transitional form between colleters and extrafloral nectaries.