Garden Phlox Roses Sweet Allysum Four O'Clocks (Mirabilis jalapa) Honeysuckle Ginger Lily (Hedychium coronarium) - or grow indoors Late Blooming Irises Amaryllis belladonna (Naked Ladies) Lycoris squamigera (resurrection lily) aka "Naked Ladies" Brugmansia - "Angel Trumpets" Datura - "Devil's Trumpets" Petunias Sweet Vanilla Marigolds Gardenias - my fave Hibiscus Mallows Late flowering Clematis Butterfly bush Daylilies Oriental Lilies Late-flowering Lilacs Morning glories (and other annual flowering vines) Coleus flowers (very sweet & amazingly fragrant) Balloon Flowers Lavender Star Jasmine - (vine) white flowering Tuberose - ditto Southern magnolia tree (Magnolia grandiflora) Blue Bells Nasturtiums Carolina Jasmine (vine) yellow flowering (spring & fall) Plumeria Scented-Geraniums (I love my coconut and lemon-rose) White-flowering Nicotianna (tobacco plant) Meadow Sweet (Filipendula ulmaria) Sweet Annie (Artemisia annua) My Jane Magnolia tree is budded all over and trying to bloom, but it is too hot. The heat spoils the fragrant pink blooms. More's the pity. All I can think of that is blooming right now. Annie

The form looks similar to a Meyer Lemon (although flower buds tend to be pinkish), but really, you wouldn't know for sure until the fruit ripen. Take a photo of mature fruit. Fruit shape, season of maturity, color, size, presence of a 'nipple' or navel, rind thickness, pealability, presence or absence of seeds, even a shot of cut-open fruit will aid identification. Also, to some degree the leaf petiole shape can help. And, lemon leaves have a distinct lemon smell when crushed. Limes leaves have a distinct lime fragrance. Orange, kumquat, mandarin and grapefruit leaves are sort of non-descript citrusy.

Daphne odora 'Aureomarginata'.

no two people are alike when it comes to IAQ features like filtering and or air purification. What works for some will not work for others. If you budget is small for this, it probably will not do what you want.... it would be easier and more cost effective in a renting environment to have designated buildings as 'smoker' qualified... meaning predominantly smoker. Then have another building as 'non smoker'. Kind of like back in the old days when restaurants had smoking and non smoking sections. It's far easier for air purification if not having to deal with a known problem for people with asthma and other respiratory problems. Any type of IAQ device you employ will require maintenance, in some cases this may mean every 3 months or less depending on the cleanliness of the environment. You never stop spending for IAQ, it is a continuous spending venture.