For Zornia
Carter, R., and R.L. Mears. 2017. Zornia gemella (Fabaceae) new to Florida. Phytoneuron 2017-4: 1-4. Published 18 January 2017. ISSN 2153 733X
Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii). Monte L. Bean Life Science Museum, Brigham Young Univ., Provo, UT.