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Photographs of studied plants. A, Oreosolen wattii Hook. f., courtesy of Guojun Hua. B, Phlomoides rotata (Benth. ex Hook. f.) Mathiesen (¼ Lamiophlomis rotata (Benth. ex Hook. f.) Kud^ o, Lamiaceae), courtesy of Jun Liu. C, Scrophularia chasmophila W.W. Sm., courtesy of Bo Song. D, Scrophularia ningpoensis Hemsl., photographed by Pan Li. 

Photographs of studied plants. A, Oreosolen wattii Hook. f., courtesy of Guojun Hua. B, Phlomoides rotata (Benth. ex Hook. f.) Mathiesen (¼ Lamiophlomis rotata (Benth. ex Hook. f.) Kud^ o, Lamiaceae), courtesy of Jun Liu. C, Scrophularia chasmophila W.W. Sm., courtesy of Bo Song. D, Scrophularia ningpoensis Hemsl., photographed by Pan Li. 

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Article
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The genera Oreosolen and Scrophularia (Scrophulariaceae) were assumed to be closely related due to the considerable similarity in morphology. Their sister relationship was even suggested in a few molecular phylogenetic studies. However, this proposed relationship is not so convincing due to insufficient sampling of Scrophularia. In this study, the...

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Context 1
... characteristics are thought to be unique in Oreosolen (vs. Scrophularia): almost stemless (vs. stem aerial), leaves in a rosette appressed to the ground and with palmate venation (vs. aerial and with pinnate venation), flowers in fascicles (vs. thyrses), and corolla tube elongate (vs. short and thick) (Tsoong, 1979;Hong et al., 1998; see also Fig. 1 and Table 2). However, the distinct vegetative features of Oreosolen may be due to its alpine habitat; in terms of floral traits, some species of Scrophularia bear similar flowers, which renders Oreosolen not as distinct as formerly thought. For example, the corollas of S. chasmophila W.W. Sm. (1.5-2.2 cm long) and S. stylosa P.C. ...
Context 2
... species of Scrophularia bear similar flowers, which renders Oreosolen not as distinct as formerly thought. For example, the corollas of S. chasmophila W.W. Sm. (1.5-2.2 cm long) and S. stylosa P.C. Tsoong (1.5-1.8 cm long) are almost as long as the corollas of Oreosolen (1.5-2.5 cm long); the inflorescences of S. chasmophila are short and reduced (Fig. 1C), which is intermediate between a typical thyrse of Scrophularia (Fig. 1D) and the fascicled inflorescence of Oreosolen (Fig. 1A). Overall, from a morphological perspective, it is not surprising to find that Oreosolen falls within Scrophularia phylogenetically, and that S. chasmophila is the most likely sister species (also supported by ...
Context 3
... as distinct as formerly thought. For example, the corollas of S. chasmophila W.W. Sm. (1.5-2.2 cm long) and S. stylosa P.C. Tsoong (1.5-1.8 cm long) are almost as long as the corollas of Oreosolen (1.5-2.5 cm long); the inflorescences of S. chasmophila are short and reduced (Fig. 1C), which is intermediate between a typical thyrse of Scrophularia (Fig. 1D) and the fascicled inflorescence of Oreosolen (Fig. 1A). Overall, from a morphological perspective, it is not surprising to find that Oreosolen falls within Scrophularia phylogenetically, and that S. chasmophila is the most likely sister species (also supported by our ongoing Scrophularia phylogeny, unpublished data, 2017). Both our ...
Context 4
... of S. chasmophila W.W. Sm. (1.5-2.2 cm long) and S. stylosa P.C. Tsoong (1.5-1.8 cm long) are almost as long as the corollas of Oreosolen (1.5-2.5 cm long); the inflorescences of S. chasmophila are short and reduced (Fig. 1C), which is intermediate between a typical thyrse of Scrophularia (Fig. 1D) and the fascicled inflorescence of Oreosolen (Fig. 1A). Overall, from a morphological perspective, it is not surprising to find that Oreosolen falls within Scrophularia phylogenetically, and that S. chasmophila is the most likely sister species (also supported by our ongoing Scrophularia phylogeny, unpublished data, 2017). Both our nuclear ( Fig. 2) and plastid ( Fig. 3 In our ITS sequence ...

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Citations

... During seven years of molecular phylogenetic analyses of Scrophularieae taxa, from the beginning of 2011 to the end of 2017, 12 studies have been published, which cover three genera of the tribe Scrophularieae and address question at generic level (Scheunert & Heubl 2011, 2014, Attar et al. 2011, Navarro-Pérez et al. 2013, Ghahremaninejad et al. 2015, Rodríguez-Riaño et al. 2015, Sotoodeh 2015, Valtueña et al. 2016, Chen et al. 2017). All studies have used only sequence data as the marker in assessing phylogenetic relationships in the Scrophularieae. ...
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