Sexuality and Structure of Flower

Introduction

The flower is a plant organ especially designed or reproduction. This is the reason plant breeders are interested in plant structure. A good knowledge on the sex character and structure of flower is essential. The sexuality of flower, the number and relative position of pistil and stamen, and the structure of accessory parts are important consideration in pollination.

Objectives

To review botanical terms applied to the reproductive organs of plants and to study the sex character and floral parts of some important crops and ornamental plants.

Methodology

• Bring fresh sample flower

• Draw and label the sample flower

• Classify the flower according to; type of flower, number of stamens and the type of plant

Discussion

The orchid family (aka Orchidaceous) is the largest flowering plant family on earth with about 30,000 species. It is also one of the oldest plant families-developing about 84 million years ago. Being so old, orchids have had plenty of time developed in the species specialized organisms. It is specifically the orchid flower rather than the foliage,that has developed in this specialized way. While orchids look very exotic, they are essence very primitive plants.

Sepals, the remains of the flower bud, are not distinguished part of the flower with most plants. But with orchids, the sepals have been modified to essentially become a part of the orchids flower.

Petals, The sepals of an orchid are unique in that they mimic the petals. An orchid has three petals, the bottom petals forms the orchid’s lip.

Lip, All orchids have a petal that forms a lip. For the pollinator, the lip often serves as a landing pad of sort. Most orchids turn in the development of the bud so that the lip is at the bottom of the flower but some have a lip at the top and are called “non-resupinate”.

The gumamela (Hibiscus rosasinensis) is a species of flowering plant found in cultivation through the Philippines. Gumamela is a native of the old world,...