Fig. 1
Farina wool observations on leaves of Dionysia tapetodes.a Overview of the densely-packed, cushion-forming D. tapetodes. b Stereomicroscope image of white woolly farina (arrow) on leaves of D. tapetodes. Scale bar = 1 mm. c Scanning electron microscopy (SEM) of farina-coated leaves. Scale bar = 300 μm. Boxed region is magnified further in (d) where wool fibres can be observed between leaves (red arrow). Scale bar = 100 μm. e Detection of backscattered electrons by SEM showing array of wool fibres. Scale bar = 5 μm. f High magnification, low kV SEM image of a farina fibre showing the grooved surface structure. Scale bar = 1 μm. g Raman microscopy of fingerprint region of farina of Dionysia tapetodes (black) compared with that of the powdery farina from Primula marginata (red). Principle peak assignments (cm−1) common to both types of farina are indicated