Additionally, the formation of functionally male and female flowers was found to occur at specific positions within the inflorescence. 5A, 5B and 4A). Starflower definition is - any of several plants having star-shaped pentamerous flowers; especially : any of a genus (Trientalis, especially T. borealis) of perennial herbs of the primrose family. Linaceae definition is - a widely distributed family of herbs, shrubs, or trees (order Geraniales) having regular pentamerous flowers with the stamens twice as many as the petals and a … A. Root hair zone B. MEDIUM. Lon^. 102. In Loranthaceae flowers are frequently hexamerous, but due to space restrictions, whorls are spatially and temporally broken up (Fig. The members of this family occur all over the world. A flower may be trimerous, tetramerous or pentamerous when the floral leaves of each whorl are in multiple of 3, 4 or 5, respectively. Photo from Achamore House. Conclusions Due to the basal position of the tribe Cedreleae in the phylogeny of Meliaceae, functionally either male or female pentamerous flowers and the presence of (at least partially) free stamens may be considered plesiomorphic traits within the family. P3 + 3 A3 + 3 G3 as ancestral for the family, DAHLGREN (1983) makes a preliminary mistake, firstly because he has to postulate a drdoublement for explaining the existence of flowers with nine or eight stamens and secondly, because he considers this floral formula as the base of an evolutionary trend to pentamerous flowers with five stamens (P5 A5 G3). The flower development in Meliosma is spiral without distinction between bracteoles and sepals. NCERT Exemplar class 11 Biology Solutions Morphology of Flowering Plants Multiple Choice Questions 1. Answer: Hypogynous- hibiscus and perigynous- plum and rose. four petals in Guarea and three carpels in Trichilia, both genera from the sub-family Melioideae) might be considered as apomorphies. Incomplete, actinomorphic and pentamerous. Trimerous, Tetramerous, and Pentamerous Flowers Makino(1989, [6]) neatly classifies all plants according to kingdom, division, class, order, family, genus, and species. A flower without a stalk or pedicel is called sessile and a flower having a stalk is called pedicellate. Solution: Malvaceae, the Hibiscus or mallow family consists of herbs, shrubs and trees. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Among magnoliids, stable pentamery with two alternating perianth whorls is known in Illigera (Hernandiaceae, Laurales), where it occurs in the context of the meristic variation from three to eight in the entire family (Kubitzki, 1993 ; outer perianth whorls sometimes dimerous, Endress & Lorence, 2004 ). shrubs or herbs. This indicates that pentamerous flowers that are functionally either male or female may be considered to be basal traits for the family. Calyx has five sepals, which are united or gamosepalous with valvate or imbricate aestivation. Physics. four petals in Guarea and three carpels in Trichilia , both genera from the sub-family Melioideae) might be considered as apomorphies. Corolla consists of five petals, which are polypetalous with vexillary aestivation. Draw the various types of aestivation possible for a typical pentamerous flower. 17. are solved by group of students and teacher of Class 11, which is also the largest student community of Class 11. Biology. To sum up, in general, the flowers of the Fabaceae family are zygomorphic, bisexual, pentamerous and hypogynous. To sum up, in general, the flowers of the Solanaceae family are complete, pedicellate, bracteate or ebracteate, actinomorphic, bisexual, pentamerous and hypogynous. 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