The Best Bottle Brush

Group Members: Angie, Richard, Georgie and Christina

Plant species: Callistemon citrinus
Plant family: Myrtaceae
Common name: Crimson bottlebrush
Distribution: South Eastern Australia
Habit: 1-3 metre high shrubs
Inflorescences: about 7mm wide and appear in clusters along the stems.
Flowers: The stamens are red, purplish-red or lilac with dark-coloured anthers.
Seeds: The seed capsules are woody, cup-shaped

Floral Morphology and visitations


anbg.gov.au
anbg.gov.au


http://www.exotic-plants.de/auktionsbilder/Callistemon_citrinus2.jpg
http://www.exotic-plants.de/auktionsbilder/Callistemon_citrinus2.jpg
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Variability of floral morphology



Carpel Length (mm)
Stamen length (mm)
Flower 1
20.1
19.2
Flower 2
24.5
22.5
Flower 3
17.9
15.5
Average
20.8
19.1
Standard Deviation
3.4
3.5
Angle and position of flower: the flower is 45 degrees to the stem which is good for pollinators to perch on

Nectar Characterisation

Flower
Volume of Nectar (um)
1
5.95
2
6.90
3
7.59
Average
6.81
Polled/Average nectar concentration = 25% sugar in nectar (evidence of bird and small mammal pollinators)

Pollen Morphology


external image bottlebrushpollen.jpg