Bibliography Details:
Author(s):
Tsou, C.-H.
Tsou, C.-H.
Article or Chapter Title:
The embryology, reproductive morphology, and systematics of Lecythidaceae
The embryology, reproductive morphology, and systematics of Lecythidaceae
Year:
1994
1994
Journal or Book:
Memoirs of the New York Botanical Garden 71: 1-110
Memoirs of the New York Botanical Garden 71: 1-110
Notes:
Abstract
Embyrology prior to fertilization, palynology, and reproductive morphology are described at the generic level for the 20 genera of Lecythidaceae s.l.
These 20 genera are unifrom in many embryological characters including: basic type anther wall formation, glandular tapetum of anther, bitegmic-tenuinucellate ovule, multi-cell-layered inner and outer integuments, Polygonum type embryo sac formation, straight micropyle formed by inner integument only, and vascularized outer integument. Embyrological data suggest that the Lecythidaceae s.l.have greater similarities with the Theaceae, Ochnaceae, Scytopetalaceae, Ebenaceae, and Styracaceae. On the other hand, good charadcters for resolving intrafamilial problems have not been discovered.
Palynology of the Lecythidaceae s.l. provides clearcut differences useful in demonstrating the Planchonioideae [= Barringtonioideae] as a monophyletic subfamily which is characterized by syntricolporate pollen with some specialized features, e.g., marginal ridges, marginal grooves, and polar cushions. The pollen of the other three subfamilies are of the common tricopor(oid)ate type without morphological autapomorphies and hence of little use in phylogenetic considerations.
The reproductive morphology of the 20 genera of Lecythidaceae s.l. exhibits a broad range of variation. The Lecythidaceae s.l. are considered as comprising a core group made up of the Planchonioideae [= Barringtonioideae], and Lecythidoideae, and two problematic subfamilies, Foetidioideae and Napoleonaeoideae. The core-Lecythidaceae share numerous characteristics in embryology, wood anatomy, and reprductive morphology with the Scytopetalaceae. On the other hand, the four genera of Foetidioideae and Napoleonaeoideae possess many specialized reproductive features which suggests that they occupy positions more remote from the core-Lecythidaceae than fhe position occupied by the Scytopetalaceae. Therefore, it is concluded that these four genera should not be included in a monophyletic Lecythidaceae which would thus consist only of the Planchoniodeae [= Barrintonioideae] and Lecythidoideae.
KEYWORDS = cladistics, embryology, Lecythidaceae, (
Abstract
Embyrology prior to fertilization, palynology, and reproductive morphology are described at the generic level for the 20 genera of Lecythidaceae s.l.
These 20 genera are unifrom in many embryological characters including: basic type anther wall formation, glandular tapetum of anther, bitegmic-tenuinucellate ovule, multi-cell-layered inner and outer integuments, Polygonum type embryo sac formation, straight micropyle formed by inner integument only, and vascularized outer integument. Embyrological data suggest that the Lecythidaceae s.l.have greater similarities with the Theaceae, Ochnaceae, Scytopetalaceae, Ebenaceae, and Styracaceae. On the other hand, good charadcters for resolving intrafamilial problems have not been discovered.
Palynology of the Lecythidaceae s.l. provides clearcut differences useful in demonstrating the Planchonioideae [= Barringtonioideae] as a monophyletic subfamily which is characterized by syntricolporate pollen with some specialized features, e.g., marginal ridges, marginal grooves, and polar cushions. The pollen of the other three subfamilies are of the common tricopor(oid)ate type without morphological autapomorphies and hence of little use in phylogenetic considerations.
The reproductive morphology of the 20 genera of Lecythidaceae s.l. exhibits a broad range of variation. The Lecythidaceae s.l. are considered as comprising a core group made up of the Planchonioideae [= Barringtonioideae], and Lecythidoideae, and two problematic subfamilies, Foetidioideae and Napoleonaeoideae. The core-Lecythidaceae share numerous characteristics in embryology, wood anatomy, and reprductive morphology with the Scytopetalaceae. On the other hand, the four genera of Foetidioideae and Napoleonaeoideae possess many specialized reproductive features which suggests that they occupy positions more remote from the core-Lecythidaceae than fhe position occupied by the Scytopetalaceae. Therefore, it is concluded that these four genera should not be included in a monophyletic Lecythidaceae which would thus consist only of the Planchoniodeae [= Barrintonioideae] and Lecythidoideae.
KEYWORDS = cladistics, embryology, Lecythidaceae, (
Multimedia:
Embryology, reproductive morphology, and systematics of Lecythidaceae.
Embryology, reproductive morphology, and systematics of Lecythidaceae.