Lemon Balm – can be used in cakes and cookies
Lemon Grass – use to flavor chicken or fish
Lemon Thyme – can be planted in rock gardens
Lemon Basil – great for Italian cooking and pesto
Lemon Verbena – use to make lemon tea, desserts
Lemon Mint – a great garnish, or to flavor iced tea
All of these are super easy to grow and readily available. Have fun gardening!
Redhead Garden 
Having dried leaves and made delicious tea with what I thought was lemon verbena, I see my live plant looks more like lemon balm or lemon mint. . .you might have included illustrations of these various lemon scented plants to help the novice. Actually they all seem to possess four properties: sedative, antispasmodic, antipyretic and antimicrobial, although conventional research is not being done…yet
You’re right in reference to their effect on the body. Taken as teas, these have the ability to settle an upset stomach, reduce headaches, and help with sleep. I currently do not have lemon verbena. That is a great idea and I will try to include pictures of it in the future.