The Colorado State flower is Aquilegia saximontana, Rocky Mountain columbine. A wild species Aquilegia. It's blue and white. It's not the same as the OP's Aquilegia.

Hi njtea, You had me going there for a minute with the photo of the cornelian cherry (cornus mas). But after looking at more photos of it (the fruit gave it away) I remembered that we had a couple of bushes in front of our old townhouse. It's definitely a spicebush. I just bought several bareroot plants because I liked the look of it so much. I haven't seen very many at all around the neighhood or neighboring towns but the Princeton U. campus has several nice specimens in full bloom. Apparently they come in several shades of yellow. Mostly the ones I've seen are a rich gold but there's one bush in Princeton that's a lighter yellow-green which is more to my liking but they are all quite striking and beautiful especially when there's not much else blooming this early. I also noticed that the magnolias on campus were just about ready to bloom and some of the stellas had actually opened a blossom or two. Our witchhazels are past bloom, I too love the scent but the winterhazel is starting to bloom now with it's long drupe of flowers. Thanks for suggesting the cornus mas

Joe, those are very easy outdoors in the summer in a pond or even a water pot. You can get them at any aquatic plant place. Boca Joe

Yes, Baptisia. Also known as false indigo. Now that you know what it is, you'll start noticing it more often. That's how it is for me anyway when i learn what something is. It is native and its tap root goes down as much as 10 ft so it is very drought tolerant in Oklahoma but that also means it's not one you can transplant by digging up. When it forms seeds it makes these really cool pods that are hard, brown and rattle when you shake them. The seeds inside are sticky too! If you're interested, you can start them from seeds but it takes years for the plant to establish so it won't bloom for about 3 years. I love native plants so thank you for letting me nerd out too. :) I am jealous of your hummingbirds. I've seen them flit through my yard but they don't stay or visit my feeder. However, they often frequent my MIL feeder less than 1/4 mile away.