The Flower Parts

Once again, I have been asked to explain the various parts that constitute a Canna flower, and the first thing to do is to explain that the petals aren't really petals, they are actually infertile stamens that have been adopted to the role. There are two types of these 'petals', namely the staminodes and the labellum, which is sometimes called the lip and which normally acts as the landing platform when an insect ascends onto the flower.

Anther
The part of a stamen that produces pollen. In the case of Canna, the pollen is released through longitudinal slits in the anther.

Labellum
A lip. A modified stamen that acts as the lower lip. When visiting the flower, this is where insects will normally alight.

Ovary
The enlarged, rounded, ovule-producing base of the female portion (the pistil) of a flower that eventually develops into a fruit after its ovules have been fertilized.

Ovule

An outgrowth of the ovary, which upon fertilization, becomes the seed.

Pistil
The female part of a canna flower. A complete pistil consists of three parts: stigma, ovary, and style.

Pollen
The dust-like particles on the anthers of a flower are pollen grains, these contain the male gametes. They must unite with the female gametes before fertile seeds can be produced.

Pollination
The transfer of pollen from the anther to the stigma of the same or a different flower to ensure fertilization of the ovules to produce seeds.
Sepal
Part of a flower, usually green, that surrounds and protects the flower in bud. The sepals are derived from modified leaves, and are collectively known as the calyx.

Stamen
The male floral organ, bearing the anther, which produces pollen.

Staminode
A sterile stamen.

Stigma
The part of the pistil of a flower, normally on the tip of the style or ovary, which receives pollen. Normally sticky so that pollen stays attached and grows pollen tubes that descend to the ovary to fertilize the eggs.

The flower parts

I have been asked to explain the various parts that constitute a Canna flower, and the first thing to do is to explain that the petals aren't really petals, they are actually infertile stamens that have been adopted to the role. There are two types of these 'petals', namely the staminodes and the labellum, which is sometimes called the lip and which normally acts as the landing platform when an insect ascends onto the flower.

Anther
The part of a stamen that produces pollen. In the case of Canna, the pollen is released through longitudinal slits in the anther.

Labellum
A lip. A modified stamen that acts as the lower lip. When visiting the flower, this is where insects will normally alight.

Ovary
The enlarged, rounded, ovule-producing base of the female portion (the pistil) of a flower that eventually develops into a fruit after its ovules have been fertilized.

Ovule

An outgrowth of the ovary, which upon fertilization, becomes the seed.

Pistil
The female part of a canna flower. A complete pistil consists of three parts: stigma, ovary, and style.

Pollen
The dust-like particles on the anthers of a flower are pollen grains, these contain the male gametes. They must unite with the female gametes before fertile seeds can be produced.

Pollination
The transfer of pollen from the anther to the stigma of the same or a different flower to ensure fertilization of the ovules to produce seeds.

Sepal
Part of a flower, usually green, that surrounds and protects the flower in bud. The sepals are derived from modified leaves, and are collectively known as the calyx.

Stamen
The male floral organ, bearing the anther, which produces pollen.

Staminode
A sterile stamen.

Stigma
The part of the pistil of a flower, normally on the tip of the style or ovary, which receives pollen. Normally sticky so that pollen stays attached and grows pollen tubes that descend to the ovary to fertilize the eggs.

And it has no long term effect?

PLANT GROWTH REGULATOR EFFECTS ON CANNA LILY

Extract from a paper by L.L. Bruner, G.J. Keever and C.H. Gilliam, Auburn University

The rather dramatic size of canna lilies makes them difficult to manage in nursery and retail settings. Canna lily species and cultivars are characterized by heights of up to five feet with leaves two feet in length and six inches in width. They bloom in mid- to late summer. Problems arise during container production due to their rapid and top-heavy growth habit. Pots blow over easily and shipping costs are increased. Plant growth regulators (PGRs) are effective in suppressing height in numerous species and may offer benefits in the production, shipping, and marketing of canna lilies. The objective of this study was to determine the effects of several rates of four PGRs on height and flowering of canna lily.

Canna lilies were divided and repotted in a substrate consisting of 7:1 pine bark to sand medium amended with 10.7 kilograms Polyon 22-4-14, 0.9 kilograms Micromax, and 3.0 kilograms limestone per cubic meter. Plants were placed in full sun with overhead irrigation. After the plants were measured the following PGRs were applied as foliar sprays: B-Nine, Bonzi, Cutless, and Pistill.

Results of this experiment show that vegetative and inflorescence height of canna lilies can be significantly reduced during production using Bonzi or Cutless. Height suppression was more persistent with Cutless than with Bonzi; however, plants treated with either PGR and transplanted into the landscape outgrew treatment effects within two months of planting.

Canna (Miniature Group) 'Froken', if subjected to the above chemicals we would never find it!