Ma, W.B., X.J. Zhao, D.Y. Tan, C.C. Baskin, J.M. Baskin, and J.H. Xue. 2010. Nutlet dimorphism in individual flowers of two cold desert annual Lappula species (Boraginaceae): Implications
for escape by offspring in time and space. Plant Ecology 9(2):361-374. Published online: doi: 10.1007/s11258-010-9772-3.
Authors: C Baskin