They might be common to you...Ours never look like the ones grown in the far-eastern parts of the world. Yours look like they are "lovin" your terrace.
Thanks for your comment sir and madame. I called them common because in our local nurseries here (even sidewalk vendors near market) bargain them about less than $3 (or Php80 - Php100) with blooms or $2 +/- bloomless for each topcut. And supplies seems to be "unlimited". Others called them ordinary. Velthius and likes are bit special and some growers collects them (and priced a bit higher).
I felt sorry if calling them "common" might not sound good to you. Thank you.