CRUCIFIX ORCHIDS

orchid.jpg

Pollination and Fertilisation

Seed Maturation:
  • Pollen transferred from one flower to another (stigma)
  • Flower collapses, ovary swells to form a pod. When pod becomes ripe it will split and disperse seeds.
  • Orchid seeds are tiny. It has no nutrition to grow, so plants rely on mychorrhizal fungus to provide nutrition to grow.

Floral Morphology and Visitations

Reproductive Organs:
  • Column= fused sexual organ.
  • Above the lip of the orchid and contains the female and male parts.
  • Inside the column is the anther (with pollen) and pistil (receives pollen and bears seeds)
  • Insects land on lip and pollen in carried by insects

Variability and Floral Morphology
Flower
Petal Length
Shape
Colour
Tube
Tube Length
Nectar Volume (mm)
1
15.9
Star
Dark orange petals, yellow crucifix centre
Fused pistil and stamen
7.2
0.1
2
15.9
"
Dark orange petals, yellow crucifix centre
"
7.2
0.1
3
15.9
"
Medium orange petals, yellow crucifix centre
"
6.9
0.1
4
15.9
"
Dark orange petals, light orange crucifix centre
"
6.9
0.05
5
15.9
"
Dark orange petals, yellow crucifix centre
"
6.9
0.05
6
15.9
"
Medium orange petals, yellow crucifix centre
"
7.2
0.1
7
16.2
"
Medium orange petals, yellow crucifix centre
"
7.2
0.2
8
15.9
"
Medium orange petals, yellow crucifix centre

7.2
0.05
9
14.4
"
Medium orange petals, yellow crucifix centre

7.2
0.1
10
16.2
"
Medium orange petals, yellow crucifix centre

7.2
0.1
Mean

-
-
-
7.11
0.095
Standard Deviation




0.145
0.044
Pollen Morphology

  • Produces pollen in clusters, so when the insect enters the tube the entire cluster attaches to the insect.
  • The pollen is not in individual filaments
  • The pollen clusters are located towards the top of tube (column)
  • he pollen is very tiny and microscopes are needed to observe the pollen

anther.jpgpollen.jpg