Flowers. Are modified twigs adapted primarily for reproduction, which ultimately forms the fruit and the seed. Parts of a Complete Flower. Pistil:. Stamen:. Stigma. Anther. Style. Filament. Ovary. Floral envelope or Perianth:. Floral stalk:. Petal (corolla). Receptacle (torus).
Are modified twigs adapted primarily for reproduction, which ultimately forms the fruit and the seed.
Floral envelope or Perianth:
Stigma – slightly enlarged tip of the style on which pollen is deposited at pollination
Style – a long and thin filament that serves as a passageway for pollen grains to move from the stigma to the ovary
Ovary – a swollen basal part of a pistil which carries the ovule or eggs (yellow); where fertilized eggs develop
The female reproductive part of a flower. It is collectively known as the Pistil.
Avocado (Persea sp.)
If a gynoecium has a single carpel, it is called
Monocarpous or Unicarpellate Gynoecium
Strawberry (Fragaria sp.)
If a gynoecium has multiple, distinct (free, unfused) carpels, it is apocarpous.
Tulip (Tulipa sp.)
If a gynoecium has multiple carpels fused (connate) into a single structure, it is syncarpous.
Filament – a stalk holding the pollen at its tip
The male reproductive part of a flower
Petal (corolla) – the innermost whorl surrounding the flowers reproductive parts. It is usually brightly colored to attract pollinators
Sepal (calyx ) – usually a green leaf-like structure that forms the outermost floral whorl; it protects the inner parts of the flower before it opens.
FLORAL ENVELOPE or PERIANTH
Receptacle (torus) – thickened part of a stem from which the flower grows
Peduncle – a stalk supporting the flower
Gerbera daisies (Gerbera sp.)
Day-blooming flowers are generally brightly colored
Night-blooming flowers are usually white, creamy or yellowish
Ilang-ilang (Cananga odorata)
Corpse flower (Amorphophallus titanum)
Flower with stinky odor
Flower with fragrant odor
Gumamela (Hibiscus sp.)
Imperfect flowers are borne on separate plants
Papaya (Carica papaya)
Canadian Burnet (Sanguisorba sp.)
Bleeding heart (DicentraSpectabilis)
Rose (Rosa sp.)
Cosmos (Cosmosbipinnatus )
Snap Dragon (Antirrhinum majus)
Sage (salvia officinalis)
Connation – when like parts are fused or united
Fused petals forming a cone
Blue eye grass
Morning Glory (Ipomea sp.)
Stamen is adnate to petals
Lip is adnate to stamen
Crucifix Orchid (Epidendrumsecundum)
Angels trumpet (Daturawrightii)
Flower parts are in 3’s or in multiple of 3’s
Flower parts are in 4’s or 5’s or in multiple of 4’s or 5’s
Rosal (Gardenia jasminoides)
Banaba (Lagerstroemia speciosa)
Water Lily (Nymphaea sp.)
Superior or Hypogynous
The sepals and petals are attached below the ovary
The sepals and petals are attached at the side of the ovary
Squash (Cucurbita sp.)
Inferior or Epigynous
The sepals and petals are attached above the ovary
The places where the ovules are attached in the ovary are known as placentae. The arrangement of the placentae inside the ovary is called placentation
The placentae are found at the central axis of a compound ovary
ovaries with ovules
The placentae are found on the wall of a compound ovary .
ovaries with ovules
The placentae are located on the wall of a single ovary. A single ovary has one chamber or locule.
ovary with ovules
String Beans (Phaseolusvulgaris)
The placentae with a single ovule is found more or less at the base of the ovary
ovaries with ovules
Flower clusters are called inflorescence. These may differ in the number of flowers borne, the sequence of flower maturation, the length of flower stalks, the number and arrangement of the floral branches or peduncles.
An inflorescence has an elongated axis with sessile (without pedicel) florets
Bottle brush (Callistemon lanceolatus)
The elongated axis is unbranched. The flowers are provided with stalks or pedicles of equal lengths and are called pedicellate flowers.
The elongated axis is branched. Flowers are pedicellate, opening all at the same time
It has a more or less flat convex top because of the pedicels bearing the outer, older flowers are longer than the younger flowers at the center.
The axis is short so that all the pedicellate flowers radiate from the apex of the axis.
Japanese bamboo (Dracaena surculosa)
Queen Anne’s Lace (Daucuscarota)
This inflorescence is similar to a corymb except that the inner pedicelled flowers open first
Shanghai beauty (Jatrophapandurifolia)
A fleshy spike (spadix) bearing both male and female flowers, surrounded by a petaloid bract called the spathe.
Calla Lily (Zantedeschia sp.)
This inflorescence is a special type of spike which is hanging or drooping . The flowers are usually unisexual.
The pedicelled or sessile flowers are crowded at one side of the stem
Deerweed (Lotus scoparius)
It is similar to umbel but the flowers are sessile. Usually the flowers are of two kinds: the disc flower at the center and the ray flowers at the margin
Sunflower (Helianthus annuus)
Gerbera (Gerbera jamesonii)