- Compost pile
- Attract butterflies
- Animal chow
Mexican Sunflower is a great example of a plant that is visually attractive and useful in several other ways.
Edible Flowers, Grow Beauty and Eat It
Biomass, consists of living, or recently living organisms, often plant based material.
BioMass also refers to alternative energy generation, or fuel source. There is plenty of stored up energy from the sun.
There is some great information about edible flowers in this video as well.