Interspecific Hybrids in Crepis. I. Crepis capillaris (L) Wallr. × C. tectorum L. Babcock, E. B. ; Collins, J. L. Abstract Publication: Proceedings of the National Academy of Science Pub Date: November 1920 DOI: 10.1073/pnas.6.11.670 Bibcode: 1920PNAS....6..670B