STUDIES IN THE FLORAL MORPHOLOGY OF THE MARANTACEAE: I. VASCULAR ANATOMY OF THE FLOWER OF SCHUMANNIANTHUS VIRGATUS ROLFE, WITH SPECIAL REFERENCE TO THE LABELLUM

1966 ◽  
Vol 44 (10) ◽  
pp. 1365-1370 ◽  
Author(s):  
V. D. Tilak ◽  
R. M. Pai
Keyword(s):  
Special Reference ◽  
Floral Morphology ◽  
Floral Anatomy ◽  
Vascular Anatomy ◽  
Vascular Bundles ◽  
Inferior Ovary ◽  
Anatomical Evidence ◽  
Floral Whorls

The floral anatomy of Schumannianthus virgatus Rolfe is described in detail. Anatomical observations indicate fusion of vascular bundles of various floral whorls commensurate with their adnation, and, in that sense, the inferior ovary is considered to be appendicular in nature. Anatomical evidence demonstrates reduction in part of the labellum and of the functional stamen. The anther is one-celled. The labellum is shown to be a unitary organ representing an anterolateral member of the inner androecial whorl.

scholarly journals Floral anatomy of Tristerix longebracteatus (Loranthaceae)

2020 ◽  
Vol 68 (1) ◽  
Author(s):  
Laura-Alejandra Lamilla ◽  
Camila-Andrea Robayo ◽  
Felipe Castaño ◽  
Xavier Marquínez-Casas ◽  
Lauren Raz
Keyword(s):  
New World ◽  
Floral Anatomy ◽  
Complex Pattern ◽  
Vascular Bundles ◽  
Serial Sections ◽  
Basic Fuchsin ◽  
Inferior Ovary ◽  
Information Gap ◽  
Fixation Techniques ◽  
Ovarian Cavity

Introduction: Most of the New World members of the Loranthaceae comprise a clade that corresponds to the tribe Psittacantheae. Previous studies on floral anatomy and development in this tribe have concentrated on the highly diversified subtribe Psittacanthinae, while the smaller subtribe Ligarineae has received less attention. A detailed anatomical description of Tristerix longebracteatus helps to fill this information gap. Objetive: The present research analyzes the anatomy of Tristerix longebracteatus flowers, detailing the structure of androecium and gynoecium, including megasporogenesis and microsporogenesis. Methodology: Anatomical serial sections of flowers at different stages of development were prepared, following processing with fixation techniques, incorporation in paraffin, microtome sectioning and staining with Astra-blue and basic fuchsin. Results: The large-sized flowers of Tristerix longebracteatus present a complex pattern of vascularization with 18-20 vascular bundles at the base of the inferior ovary. A group of three vascular bundles irrigate the 4-5 petals and associated stamens, and ten bundles continue through the gynoecium. The androecium is composed of four or five anthers with simultaneous microsporogenesis. The gynoecium as a single ovarian cavity with a central mamelon in which the archesporial tissue is oriented towards the style. The base of the style forms a nectary similar to that found in the sister genus Ligaria. Conclusions: The gynoecium with a single ovarian cavity and central mamelon is a condition shared by Tristerix (subtribe Ligarinae) and all the genera of the subtribe Psittacanthinae, except Tripodanthus. The base of the style forms a nectary similar to that found in the sister genus Ligaria. This type of stylar nectary is of taxonomic value for grouping species of the subtribe Ligarinae and difers from the annular nectary of subtribe Psittacanthinae.

Floral morphology of the Amaryllidaceae. I. Subfamily Amaryllidioideae

1972 ◽  
Vol 50 (7) ◽  
pp. 1555-1565 ◽  
Author(s):  
V. Singh
Keyword(s):  
Floral Morphology ◽  
Vascular System ◽  
Vascular Supply ◽  
Vascular Strand ◽  
Vascular Bundles ◽  
Inferior Ovary ◽  
Three Bundles ◽  
Perianth Tube ◽  
Peculiar Mode

The flowers of the subfamily Amaryllidioideae are similar to one another in that they are fragrant, showy, bisexual, and epigynous with two trimerous whorls of perianth and stamens each, and a compound gynoecium. A single vascular strand supplies the vascular system of both a perianth member and a stamen. It splits into three bundles, one median and two laterals. The former constitutes the vascular supply of a perianth member, while the latter, facing one another right and left, fuse to supply a stamen. This peculiar mode of branching of the vascular strand is considered to be associated with superposition of a stamen upon a perianth member. The corona of Narcissus which is supplied by inversely oriented vascular bundles, is regarded as an outgrowth from the perianth tube and those of Eucharis and Pancratium, which are non-vascular, to represent the stamen cup. Two series of vascular strands differentiate in all members investigated. While the inner series constitutes the placental supply, the strands of the outer series which vary in number in different genera, show various degrees of adnation among the traces occurring on the same radius. The nature of the inferior ovary has been discussed. The nectaries are considered to be of quite advanced type.

Floral morphology of certain species of the Papilionaceae with a special reference to stamen adelphy

Taeckholmia ◽  
2001 ◽  
Vol 21 (1) ◽  
pp. 153-172 ◽  
Author(s):  
Abd El-Salam Al- Nowaihi ◽  
Karima Hamed ◽  
Magdy Mourad
Keyword(s):  
Special Reference ◽  
Floral Morphology

Floral anatomy of the genus Oligarrhena R. Br. (Epacridaceae)

1968 ◽  
Vol 16 (3) ◽  
pp. 451 ◽  
Author(s):  
BR Jackes
Keyword(s):  
Floral Anatomy ◽  
Vascular Anatomy ◽  
The Other

The organography and vascular anatomy of the flower of Oligarrhena micrantha R. Br, has been examined in detail. Whilst in general agreement with the other members of the tribe Styphelieae, it does exhibit a greater degree of carpel sterilization, and supports the suggestion that progressive sterilization has been occurring within this tribe.

Vascularisation de la fleur pistillée de Begonia handelii

1981 ◽  
Vol 59 (5) ◽  
pp. 819-825 ◽  
Author(s):  
Denis Barabé
Keyword(s):  
Pistillate Flower ◽  
Vascular Bundles ◽  
Vascular Pattern ◽  
Serial Sections ◽  
Inferior Ovary

The pistillate flower of Begonia handelii Irmscher has a tetramerous gynoecium. The analysis of serial sections shows that the anatomical pattern observed by Gauthier (1950) on trimerous gynoecia also occurs in tetramerous gynoecia. For each carpel there are theoretically seven vascular bundles which leave the stele. The vascular pattern of the pistillate flower of B. handelii leads us to adopt the appendicular theory of the inferior ovary. The position of vascular bundles, the presence of gaps, and the absence of recurrent bundles show that the ovary is formed by the union of appendicular organs. In this case, the inferior ovary results from the close union of carpels and perianth parts. In the pistillate flower of B. handelii, the perianth parts are disposed on two dimerous whorls: the first corresponds to a whorl of sepals, and the second to a whorl of petals.

Nerve Supply to the Soft Palate Muscles with Special Reference to the Distribution of the Lesser Palatine Nerve

2005 ◽  
Vol 42 (5) ◽  
pp. 495-500 ◽  
Author(s):  
Takashi Shimokawa ◽  
Shuangquin Yi ◽  
Shigenori Tanaka
Keyword(s):  
Facial Nerve ◽  
Special Reference ◽  
Soft Palate ◽  
Border Region ◽  
Nerve Supply ◽  
Levator Veli Palatini ◽  
Pharyngeal Plexus ◽  
Anatomical Evidence

Objective Descriptions of the innervation of the soft palate muscles in previous studies have varied according to the author. In the present study, distribution of the lesser palatine nerve, through which motor fibers of the facial nerve are considered to reach soft palate muscles, and that of the pharyngeal plexus in the soft palate were investigated in order to reexamine the innervation of the soft palate muscles according to anatomical evidence. Results Observations suggested that the levator veli palatini and palatopharyngeus were doubly innervated by branches of the lesser palatine nerve and pharyngeal plexus, and that the musculus uvulae was innervated by only the lesser palatine nerve. Conclusion The soft palate is considered to be located in the border region between the areas of distribution of the lesser palatine nerve and pharyngeal plexus. This may be why controversies exist in previous studies about the innervation of the soft palate muscles.

Andromonoecious sex expression of flowers and pollinia delivery by insects in a Japanese milkweed Metaplexis japonica (Asclepiadaceae), with special reference to its floral morphology

2006 ◽  
Vol 21 (3) ◽  
pp. 193-199 ◽  
Author(s):  
HAJIME TANAKA ◽  
TAKEO HATANO ◽  
NORIKO KANEKO ◽  
SUGATAKO KAWACHINO ◽  
OSAMU KITAMURA ◽  
...  
Keyword(s):  
Special Reference ◽  
Floral Morphology ◽  
Sex Expression
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