A further analysis of secretory structures of some taxa belonging to the genus Hypericum (Clusiaceae) in relation to the leaf vascular pattern

Authors

ROSARIA PERRONE
PAOLO DE ROSA
OLGA DE CASTRO
PAOLO COLOMBO

DOI

10.3906/bot-1206-22

Abstract

This work extends knowledge about the distribution of secretory structures (black nodules, translucent glands, and type A and B secretory canals) to other species of the genus Hypericum L., as only H. perforatum L. appears to have been widely investigated. Moreover, the current study was extended to include leaf vascular patterns. In the species studied, a possible correlation between the presence of black nodules and a particular biological form, that of hemicryptophytes scapose perennials such as H. perfoliatum L., H. perforatum L., H. pubescens Boiss., H. tetrapterum Fr., and H. triquetrifolium Turra, was noted. These black nodules are not present in H. androsaemum L. and H. hircinum L., which are bushy nanophanerophytes, or in H. aegypticum L., a xero-halophyte. The xylem pattern results are camptodromous brochidodromous in H. androsaemum, H. hircinum, H. perforatum, and H. pubescens; basal acrodromous in H. perfoliatum, H. tetrapterum, and H. triquetrifolium; and camptodromous cladodromous in H. aegypticum.

Keywords

Hypericum, leaf vascular pattern, black nodules, secretory canals, translucent glands

First Page

847

Last Page

858

Recommended Citation

PERRONE, ROSARIA; ROSA, PAOLO DE; CASTRO, OLGA DE; and COLOMBO, PAOLO (2013) "A further analysis of secretory structures of some taxa belonging to the genus Hypericum (Clusiaceae) in relation to the leaf vascular pattern," Turkish Journal of Botany: Vol. 37: No. 5, Article 7. https://doi.org/10.3906/bot-1206-22
Available at: https://journals.tubitak.gov.tr/botany/vol37/iss5/7