Question

Explain bracteate flower and ebracteate flower with suitable examples.

Answer 1

Various Technical Terms related to flowers:

1. Bract: A small leaf like, green structure present at the base of flower is called bract.
2. Bracteole: When a small leaf like structure is present anywhere on pedicel apart from bract is called Bracteole.
3. Bracteate (Br): When flower bom in axis of bract is called breacteate.
4. Ebracteate (EBr): When flower is directly present on peduncle and bract is absent.
5. Ebracteolate(EBiT): When breacteoles are absent in the axis of flower.
6. Pedicellate: Flower with stalk.
7. Sessile: Flowere without stalk.
8. Subsessile: Flower with very small stalk.
9. Complete : Flower with all four whorls namely calyx, corolla, androecium and gynoecium are present is called complete flower, e.g., China rose.
10. Incomplete: A flower in which if any of four whorls is absent is called incomplete flower.,e.g.. Caster flower and flower of Cucurbitaceae family.
11. Actinomorphic: When a flower can be cut into two equal halves along any planes passing through central axis, e.g.,  Brassic China rose, Potato, Ipomoea.
12. Zygomorphic: When a flower can be cut into two equal halves only along one planes passing through central axis.
13. Medianly zygomorphic: When a flower can be put into two equal halves only from median longitudinal plane (anterior to posterior plane), e.g. Pea and Basil.
14. Laterally zygomorphic: When a flower can be cut into two equal halves only from lateral plane, e.g. Fumaria.
15. Asymmetrical: When a flower cannot be cut into two equal halves from any plane, e.g., Canna.
16. Unisexual: When any one of Androecium or Gynoecium is present in flower, eg, Coster.
17. Male or staminate: A flower only with androecium where gynoecium is absent, e.g., Tassel of Zeamays.
18. Female or pistillate: A flower only with gynoecium where androecium is absent, e.g., Cob of Zeamays.
19. Bisexual or hermaphrodite: When both androecium and gynoecium are present in a flower, e.g., China rose.
20. Neuter: When both androecium and gynoecium are absent or non-functional, e.g., Ray florets of Sun flower.
21. Regular: When all whorls have the same number of members and the members of each whorl are similar in shape and are placed at equidistance, e.g, Mustard.
22. Irregular: When all the floral whorls are unequal, e.g., Pisum, Iberis.
23. Cyclic: When all whorls of flower are arranged on thalamus in cyclic pattern.
24. Semicyclic: When in a flower some members are cyclic and some members are non – cyclic. e.g.. Rose.
25. Acyclic: When all whorls of flower are not arranged on thalamus in cyclic pattern, e.g., Ranunculus.
26. Dimerous: When the floral members are in two or in the multiple of two; e.g., Qpium.
27. Trimerous: When the floral members are in three or in the multiple of three; e.g., Monocotelydon flowers.
28. Tetramerous: When the floral members are in four or in the multiple of four; e.g., Mustard.
29. Pentamerous: When the floral members are in five or in the multiple of five; e.g., China rose.