I have solidago 'Fireworks' growing in mid-afternoon shade. It stays shorter than those in full sun but blooms well. This is not a spring bloomer. It blooms in the fall, September/October for me. Keep in mind that store plants are often forced into early bloom.

My false sunflowers are beautiful - they are still covered with yellow flowers. They are pretty big though, about 5 feet tall - a little shorter if you pinch them in June. Someone also mentioned roses. I have Golden Showers climbers. They require more care than I wish but they return the favor. They start in June and are still blooming now. I have them growing along my porch and in July there was a week where it looked like I had a bouquet of yellow roses waiting at the top of my porch steps every day. This is subtle but I love my stonecrop that has yellow flowers in the spring then makes a great ground cover all summer. Nobody mentioned Allysum basket of gold. I have new seedlings of that and Im wondering how it will be... Here is a link that might be useful: stonecrop photo

Thank you, Leo. I am thrilled that you have joined the forum. We actually met a couple of years ago and you graciously gave my friend and me a tour of this fantastic rose garden. You are not only a knowledgable and dedicated curator but also a gracious person. I mentioned you in my comment up on this thread. I posted the photo of this gorgeous rose on helpmefind.com and a couple of rosarians, as it were from Australia, contested that it's Mme de Watteville. I eventually had to remove the photo I posted there because I didn't want to cause any controversy and one HMF member felt very strongly that it was not Mme de Watteville. Either way it's gorgeous. I was so excited about the incredible roses you grow there that I enthusiastically posted on my visit to this garden twice on this forum: https://www.houzz.com/discussions/4807667/visit-to-armstrong-park-rose-garden-nola https://www.houzz.com/discussions/4965219/new-orleans-rose-gardens-update-generals-noisettes-fairies BTW, I initiated that Louis Armstrong Rose Garden is included among the public gardens on helpmefind.com and provided them with the list as I saw them on tags during my visits in 2017 and 2018. If and when you have time, please take a look at that list and correct if any need be added or removed. The link is here: https://www.helpmefind.com/gardening/l.php?l=3.25191&tab=32 Based on that list, a dedicated administrator provided the links for each rose in the garden: https://www.helpmefind.com/gardening/l.php?l=3.25191&tab=2 General information with your name as the curator is here: https://www.helpmefind.com/gardening/l.php?l=3.25191&tab=1 I will be in New Orleans later this summer and hope we'll have a chance to meet again. Thank you for the wonderful work you are doing preserving the roses.

Regarding horticultural selections generally (and not lilies in particular) renaming has gone on a lot over time. Especially with old varieties that have been grown frequently over large areas published accounts may list a multitude of synonymous cultivar names that have been coined by various parties. (Even some wild plants being treated by the supposedly sober realm of professional botany may rather often have been subjected to repeated publication of differing botanical names). And trademarking and patenting do not confer 100% protection of commercially "owned" plants, as some selling of what are clearly examples of such under new names fabricated by second parties does appear to occur.