time-lapse: willow flower

Environment
Herbivory
- caterpillar
  - sycamore
  - milkweed
Microbes
Plant development
- growth
  - American chestnut
  - black locust
- forest phenology
- flowers
  - black cherry
  - fire pink
  - honeysuckle
  - larkspur
  - redbud
  - trout lily
  - tulip poplar
  - willow
Plant taxonomy
- floral fusion
- flower arrangement
  - simple
  - raceme
  - umbel
- flower gender
  - dioecious
  - monoecious
- flower symmetry
  - actinomorphic
  - zygomorphic
- flowers
  - black cherry
  - fire pink
  - honeysuckle
  - larkspur
  - redbud
  - trout lily
  - tulip poplar
  - willow
- ovary placement
  - superior
  - inferior
- seedling growth
  - American chestnut
  - black locust
- miscellaneous
  - sepal spur
  - carpels

willow (Salix sp.)

Family- Salicaceae

Flowers

Inflorescences- axillary or terminal, catkins, flowers sessile
Gender- dioecious (imperfect/unisexual)

Perianth

Calyx absent
Corolla absent

Androecium

numerous stamens per flower

Gynoecium

female flowers appear as catkins (not shown)
Ovaries superior,
1 pistil per flower,
Gynoecium syncarpous
2 carpel per flower
1 style per pistil

This particular sequence was taken using a Canon Digital Rebel controlled by a laptop running the program RemoteCapture 2.7. The photo interval was 10 minutes.