To be blithesome is to be happy and without a care in the world. If you are feeling blithesome, you might want to skip or at least kick your heels up in the air. While I often think of tulips as quiet / timid / demure flowers, like the elegant / shy girls in the corner, when they open up, look out! Wow, how stunningly vibrant they can be! Tulips are indeed blithesome bulbs.