Abstract
The vascular anatomy of the flower of 18 species of Bignoniaceae is described. The flowers are hermaphrodite, zygomorphic, hypogynous and pentamerous. In many investigated taxa several medullary traces are given from the central vascular cylinder. The calyx shows much variation in its vascular supply in different taxa of the family. It is suggested that one-trace condition of the sepals has arisen by the fusion of the laterals with the median and multitraced condition by amplification of the three traces. Each petal receives a single trace but inTecomaria capensis although there are four petals, five traces differentiate for the corolla. The posterior petal which has two traces seems to have arisen by the incorporation of two petals. A siphonostelic stamen trace has been observed in some taxa and it has been correlated with the large size of the filaments. The vascular supply of each carpel consists of a dorsal bundle, a ventral strand and several carpellary laterals. The Bignoniaceae show an intermediate condition between axile and parietal placentation. The disc is very richly vascularised and derives its vascular supply from more than one source. It is suggested as carpellary in nature.
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References
Baillon H 1891Histoire des plantes (Paris: Tom X)
Bentham G and Hooker J D 1862–1883Generaplantarum 2 (London: L Reeve and Co.)
Bureau E 1864Monographie des Bigttoniacèes (Paris: J B Bailliere et fils)
Campbell D H 1929 The phylogeny of the angiosperms;Bull. Torrey Bot. Club 55 479–497
Carlquist S 1969 Toward acceptable evolutionary interpretations of floral anatomy;Phytomorphology 19 332–362
Cronquist A 1968The evolution and classification of flowering plants (London: Thomas Nelson)
Cutting E M 1921 On the pollination mechanism ofIncarvillea delavayi Franch;Ann. Bot. (London)35 63–71
Eames A J 1931 The vascular anatomy of the flower with refutation of the theory of carpel polymorphism;Am. J. Bot. 18 147–188
Fenzl E 1844 Über eine neue crescentiee;Amtl. Bericht überd. 21.vers. deutsche Naturf. u., Gratz
Ford E S 1942 Anatomy and histology of Eureka lemon;Bot. Gaz. 104: 288–305
Hiern W Ph 1900Catalogue of the African plants collected by Dr Friedrich Welwitsch in 1853–1861, London
Hutchinson J 1959The families of flowering plants 1 (Oxford: Clarendon Press),
Hutchinson J 1969Evolution and phylogeny of flowering plants (London: Academic Press)
Hutchinson J and Dalziel J M 1931Flora of West Tropical Africa 2 (London)
Jain D K 1977Morphological, anatomical and ontogenetic studies in Bignoniaceae; Ph.D. Thesis, Meerut University, Meerut
Jain D K and Singh V 1979 Floral development ofPyrostegia venusta (Bignoniaceae);Acta Bot. Neerl. (in press)
Lawrence G H M 1951Taxonomy of vascular plants (New York: Macmillans)
Leinfellner W 1972 Das Gynözeum der Bignoniaceen. I. Über den Bau des Fruchtknotens vonKigelia (Crescentieae); Österr.Bot. Z. 120 269–277
Melchior H 1964 Tubiflorae; Engler’ssyllabus der Pflanzenfamilien (ed. H. Melchior) Band II (Berlin: Gerbrüder Borntraeger)
Puri V 1951 The role of floral anatomy in the solution of morphological problems;Bot. Rev. 17 471–553
Puri V 1952 Placentation in angiosperms;Bot, Rev. 18 603–651
Puri V and Agarwal R M 1976 On accessory floral organs;J. Indian bot. Soc. 55 95–114
Rao V S 1953 The floral anatomy of some Bicarpellatae. I. Acanthaceae;J. Univ. Bombay 21 1–34
Rao V S 1954 The floral anatomy of some Bicarpellatae. II. Bignoniaceae;J. Univ. Bombay 22 55–70
Rao V S 1955 The floral anatomy of some Bicarpellatae. III. Pedaliaceae;J. Univ. Bombay 23 18–26
Rao V S 1971 The disc and its vasculature in the flowers of some dicotyledons;Bot. Notiser 124 442–450
Rendle A B 1938The classification of flowering plants 2 (Cambridge: University Press)
Saunders E R 1934 A study ofVeronica from the viewpoint of certain floral characters;J. Linn. Soc. (London) Bot. 49 453–493
Schumann K 1895 Bignoniaceae;Die natürlichen Pflanzenfamilien; eds Engler and Prantl Band IV (3b) 189–252 (Leipzig: Wilhelm Engelmann)
Seibert R J 1948 The use of glands in a taxonomic consideration of the family Bignoniaceae;Ann. Mo. Bot. Gard. 35 123–136
Singh V and Jain D K 1979 Floral organogenesis inAdenocalymna alliaceum (Bignoniaceae).Beit. Biol. Pflanzen 54 207–213
Thompson J M 1933 Studies in advancing sterility. VI. The theory of scitaminean flowering;Univ. Liverpool Hartley Bot. Lab. Publ. 11 1–114
Varghese T M 1964Morphological studies in the family Scrophulariaceae; Ph.D. Thesis, Agra University, Agra
Venning F D 1945 Accessory vascular bundles inMurraya koenigii (Linn.) Spreng;J. Wash. Acad. Sci. 35 352–356
Venning F D 1947 Variation of accessory vascularization in four species ofCitrus and their possible application as new taxonomic characters;J. Wash. Acad. Sci. 37 210–217
Willis J C 1973A dictionary of the flowering plants and ferns; 8th ed. (Revised by Airy Shaw) (Cambridge: University Press)
Wilson C L 1937 The phytogeny of the stamen;Am. J. Bot. 24 686–699
Yamazaki T 1957 Taxonomical and phylogenetic studies of Scrophulariaceae—Veronicae with special reference toVeronica andVeronicastrum in Eastern Asia;J Fac Sci Univ. Tokyo 7 91–162
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Jain, D.K., Singh, V. Studies in Bignoniaceae—VI. Floral anatomy. Proc. Indian Acad. Sci. 88, 379–390 (1979). https://doi.org/10.1007/BF03046111
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DOI: https://doi.org/10.1007/BF03046111