How much weed is a felony in Texas?

Excuse me, could you please clarify for me what constitutes a felony when it comes to the possession of weed, or marijuana, in the state of Texas? I understand that there are varying degrees of illegality based on the quantity possessed, but I'm specifically interested in knowing at what point the possession of weed becomes classified as a felony rather than a misdemeanor. Is there a specific amount that, if exceeded, would result in felony charges? Thank you for your assistance in clarifying this matter.