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Table 1 Comparison of morphological characteristics of D. japonica

From: Utility of taxon-specific molecular markers for the species identification of herbarium specimens: an example from Desmarestia japonica (Phaeophyceae, Desmarestiales) in Korea

Characters Womersley (1987) (as D. ligulata) Yoshida (1998) (as D. ligulata) Yang et al. (2014) (as D. japonica) Korean specimens (in this study)
Color Medium brown to greenish brown Light olive brown Light olive brown
Height Usually 20–50 cm tall 60–100 cm tall 0.6–1 (− 2) m tall 40–67 cm
Width of branches With axis and primary laterals mostly 2–5 mm broad 3–6 mm wide branches 2–6 (− 20) mm wide branches (0.7 −) 1.7–4 mm wide branches
Holdfast Discoid holdfast Conical or flattened Discoid holdfast
Branching type Fronds with frequent opposite branching to 3 orders Opposite to ca. three times branching Opposite, branches of limited growth branched to two to three times Opposite, branched to two to three times
Branch morphology More or less linear but tapering apically and basally, dentate, and with a faint to conspicuous midrib (the axial filament) Wide linear feather-like branches, tapering apically and basally with midrib Branches stipitate and attenuate at base and apex Branches stipitate and attenuate at base and apex