For Linaria
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Ogutcen, E., and J.C. Vamosi. 2016. A phylogenetic study of the tribe Antirrhineae: Genome duplications and long-distance dispersals from the Old World to the New World. Amer. J. Bot. 103: 1071-1081. Google Scholar
Pennell, F.W. 1935. The Scrophulariaceae of eastern temperate North America. Academy of Natural Sciences of Philadelphia Monograph No. 1. Google Scholar
Sáez Goñalons, L. 2019. Linaria. In Flora of North America Editorial Committee. 2019. Flora of North America north of Mexico. Volume 17, Magnoliophyta: Tetrachondraceae to Orobanchaceae. Oxford Univ. Press, New York, NY. 737 pp. Google Scholar
Sutton, D.A. 1988. A revision of the tribe Antirrhineae. British Museum (Natural History), Oxford Univ. Press, London. Google Scholar
Yousefi, N., G. Heubl, and S. Zarre. 2017. Subgeneric classification of Linaria (Plantaginaceae; Antirrhineae): molecular phylogeny and morphology revisited. Progr. In Biol. Sci. 7: 53-65. Google Scholar
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