It's impossible to give a single definitive answer to this question. There are many crystalline compounds derived from various plants, each with its own unique properties and uses. To give you a more specific answer, I need more context.

Could you please clarify your question? For example, you could tell me:

* What type of plant are you interested in? (e.g., flowers, herbs, trees)

* What are the properties or uses of the compound you're looking for? (e.g., medicinal, aromatic, coloring agent)

* Do you have any other specific information about the compound? (e.g., its chemical formula, its color, its melting point)

With more information, I can help you identify the specific crystalline compound you're looking for.