Quick answer: 5 native Texas plants have a recorded bloom range that includes January.
5 species
- Carolina jessamine Gelsemium sempervirens · 10 states
- Huisache Vachellia farnesiana · 1 states
- Longleaf pine Pinus palustris · 10 states
- Mexican olive Cordia boissieri · 1 states
- Slippery elm Ulmus rubra · 30 states