Single-crystal X-ray structures were collected on an early-stage (4 h) hexagon, and two double-decker flowers (48 h) as well as on individual petals cleaved from the flowers that were obtained after 6 h and 48 h (Figure , Tables ). These crystals were analyzed for facet indexing (Figure , S8). The double-side morphology of the double-decker flowers could be indicative of crystal twinning phenomena. Therefore, the measurements were performed with a single-crystal X-ray diffractometer with a 100 μm large cross-section beam, thus enabling the entire multidomain crystal to be exposed by the beam during the data collection. All the analyzed structures turned out to be single crystals, including the entire double-decker flowers (Figure ) despite their morphological multidomain appearance with 12 distinct petals. Ewald's sphere plots show a single diffraction pattern that can be indexed with a single crystalline domain, without signs of polycrystallinity (Figure ). We also ruled out the possibility of merohedral twinning. Such twinning occurs when all the twin domains overlap perfectly in both direct and reciprocal space.