Ipomoea quamoclit is native from South America up to Northern Mexico. It has naturalized in some warmer zones in the United States. This annual twining vine is commonly known as 'Cypress Vine' but also goes by the name of Hummingbird Vine and Star Glory. It is also sometimes confused with Ipomoea sloteri "Cardinal Climber." While the two vines and flowers look similar they have some pretty obvious differences. In my opinion Cypress Vine is the better of these two plants because of the softer foliage and star shaped flowers.
I purchased a packet of 'Cypress Vine' "Valentine Mix" because it contains red, white and pink blooms of this flower. I must not have saved any seeds from the pink or white blooms last year because this year I've only noticed the reds blooming. Here in Chicago I grow this vine in full sun in poor soil where it blooms profusely well into the fall.
This vine has been the subject of conversation many times in my garden because people are really attracted to the flowers though the white and pink seem to get the most attention. The second characteristic that is commented on is the dainty foliage that just provokes you to reach out and touch the vine. I like that in my small urban garden it provides cover and interest without being overbearing.
If you click and enlarge the image above you can look at the visual clues I use when I collect 'Cypress Vine' seeds. If you press the browning seed pods between your thumb and index finger you should feel a little resistance from the hard seeds inside and the pod may start to break apart. If the seeds aren't ripe they will be pliable and if you open the pod the seeds will be a light color or white. Saving 'Cypress Vine' seeds is very easy once the 'Cypress Vine' seed pod ripens.
Related: 'Cardinal Climber' Vine Ipomoea sloteri.