Morphological studies on the genusClematis linn. VIII. Floral and inflorescence anatomy inClematis patens with eight-sepaled flowers |
| |
Authors: | Hiroshi Tobe |
| |
Institution: | (1) Laboratory of Phylogenetic Botany, Faculty of Sciences, Chiba University, Yayoicho, 260 Chiba |
| |
Abstract: | The vascular anatomy of inflorescence axes and flowers ofClematis patens have been studied. The species shows a unique behaviour of the vascular bundles in the transition node from vegetative stem
to pedicel: stelar bundles increase in number from six to eight as they ascend through the transition node so that the number
of vascular bundles coincides with that of sepals. In the pedicel stele the resulting eight bundles are disposed opposite
to eight sepals. respectively; each sepal receives its vascular supply from the bundle facing it. Morphological and anatomical
evidence suggests that the calyx of eight sepals in this species should be interpreted as having consisted originally of four
pairs of opposite organs, rather than as having been derived secondarily through chorisis of sepals from a calyx of four sepals
as seen in most other species ofClematis. |
| |
Keywords: | Clematis Floral anatomy Nodal anatomy |
本文献已被 SpringerLink 等数据库收录! |