FIGURE 4 in The rediscovery of Billburttia vaginoides, with notes on the morphology, anatomy, traditional uses and conservation status of the genus Billburttia (Apieae, Apiaceae)

FIGURE 4. Scanning electron micrographs showing the morphology of aggregated acicular crystals in mesocarp cells. A1 and A2. Billburttia capensoides (Rakotonandrasana & Ratrimosaona 1494, TAN, CNARP). B1 and B2. B. vaginoides (Rakotonandrasana & Ratrimosaona 1495, TAN, CNARP). Scale bars: A1, B1 = 5 μm; A2, B2 = 10 μm.