We have a list on safe trees/wood...Now, flowers:

Acacia
Anise (Pimpinella anisum)
African Tulip Tree (Spathodea campanulata)
Apple blossum (Malus domestica)
Bald Cypress (Taxodium distichum)
Basil (Ocimum basilicum)
Bee balm (Monarda)
Borage blossoms (Borago officinalis)
Bottlebrush (Callistemon spp.)
Calendula (Pot Marigold) (Calendula officinalis)
Carnations (Dianthus caryophyllus)
Chamomile (Chamaemelum nobile)
Chives (allium schoenoprasum)
Coriander/cilantro (Coriandrum sativum)
Daises
Dandelion (Taraxacum)
Daylily (Hemerocallis spp.)
Dill (Anethum graveolen)
Elderberry (Sambucus spp.)
Eucalyptus
Fennel (Foeniculum vulgare)
Gardenia (Gardenia jasminoides)
Garlic (Allium sativum L.)
Gladiolus
Grapefruit (Citrus x paradise)
Hibiscus
Honeysuckle (Lonicera)
Impatiens
Jarcaranda (Jacaranda mimosifolia)
Kumquat (various Fortunella species)
Lilac (Oleaceae Syringa)
Lime (Citrus aurantifolia)
Lemon (Citrus × lemon)
Milk thistle (Silybum species)
Melalecuca (Melaleuca quinquinervia)
Nasturtiums
Orchid tree (Bauhinia verigata)
Okra (Abelmoschus esculentus)
Orange (Citrus sinensis)
Oregano (Origanum vulgare)
Pansies (Viola tricolor)
Passion flowers (Passifloraceae Passiflora)
Petunia (Petunia spp.)
Plum (Prunoideae Prunus)
Pumpkin (Cucurbita pepo or Cucurbita mixta)
Roses/Rose hips (Rosoideae Rosa)
Rosemary (Rosmarinus officinalis)
Runner Beans (Phaseolus coccineus)
Sage (Salvia officinalis)
Sunflowers (Helianthus annuus)
Thyme (Lamiaceae Thyme)
Zucchini (Cucurbita pepo.)
Violets (Violaceae Viola)

If anyone has any to add...please feel free.

I don't recall if you mentioned Hibiscus flowers but I understand they too are safe.
My question is how exactly do you give a flower to your bird? After washing it do you tear it apart? I have offered my Senegal flowers before but she acts afraid of them & won't go near them.
She has been plucking for almost a year now due to our move & it's stress. I have given her special foraging boxes, small boxes of raisins, numerous toys (many to encourage foraging) but she will not touch them. I put 4 drops of 'rescue remedy' in her distilled water daily also.
Does anyone have any suggestions to cure her? Foods, etc?
thanks

Thank you so much for this list. Hibiscus is on there and its the one I was looking for to be there or not. I am saving it for future reference for myself. ~Jenna

Senegals don't like flowers and, in my experience, they don't really play much with toys. They do love chewing holes in things so maybe a large piece of thin wood with a little hole drilled in the middle (they like to start around the hole and make it bigger and bigger and bigger). Also, give her a large bowl for her to bathe in (they do love their daily baths but hate misting). Keep her to a strict natural daylight schedule with full exposure to both dawn and dusk (VERY IMPORTANT!). Use good quality full spectrum lights in the room where she is kept. Organic food but not pellets unless she eats TOP and, regardless of what her staple is, always supplement her diet with lots of fruits, veggies and greens (they are great eaters!). You shouldn't give her distilled water, try a good spring instead (distilled lacks natural minerals and it leeches stuff out of its container which should never be plastic). And don't overdo it on the drugs, those remedies might be herbal but none of them are meant to be used long term.