That looks just like my first dendrobium. It was tall, over 36 inches, to tip of spike. Well, one day I heard a crash and it had fallen off the table. Broke its little neck (spike that is). I wanted to cry but was thankful it had not broken more. I put the spike in a bud vase and it lasted over 1 month before the blooms fell. It was in bloom for a month before it fell, so it is a hardy little devil. Enjoy your find.