. Superior ovary: It is the ovary with the sepals, petals and stamens attached at the base of the ovary. . Inferior ovary: It is the ovary with the sepals, petals and stamens attached at the apex of the ovary.
. Half-inferior ovary: It is the ovary with the sepals, petals and stamens or hypanthium attached near the middle of the ovary. Hypanthium present Hypanthium absent Hypanthium absent Ovary inferior Ovary half-inferior Ovary superior Hypanthium Hypogynous Perigynous Epiperigynous Epigynous Epihypogynous Figure . : Perianth / Androecial position on thalamus .
. Perianth / Androecial position on thalamus: It describes placement of the perianth and androecium relative to the ovary and to a hypanthium, if present ( Figure . ). Hypanthium ( Staminal disk) : a fleshy elevated often nectariferous cup like thalamus .
Construction of floral diagram and floral formula A floral formula is a simple way to explain the salient features of a flower. The floral diagram is a representation of the cross section of the flower. It represents floral whorls arranged as viewed from above. Floral diagram shows the number and arrangement of bract, bracteoles and floral parts, fusion, overlapping and placentation.
The branch that bears the flower is called mother axis . The side of the flower facing the mother axis is called posterior side . The side facing the bract is the anterior side. The members of different floral whorls are shown arranged in concentric rings.
Br : Bracteate. Ebr : Ebracteate Brl : Bracteolate Ebrl : Ebracteolate : Actinomorphic % : Zygomorphic Hypogynous: The term is used for sepals, petals and stamens attached at the base of a superior ovary. Example: Malvaceae Epihypogynous: The term is used for sepals, petals and stamens attached at the middle of the ovary (half-inferior). Example: Fabaceae, Rosaceae.
Epigynous : The term is used for sepals, petals and stamens attached at the tip of an inferior ovary. Example: Cucumber, Apple, Asteraceae. Perigynous: The term is used for a hypanthium attached at the base of a superior ovary. Epiperigynous: The term is used for hypanthodium attached at