Figure 8 from: De Block P, Rakotonasolo F, Ntore S, Razafimandimbison SG, Janssens S (2018) Four new endemic genera of Rubiaceae (Pavetteae) from Madagascar represent multiple radiations into drylands. PhytoKeys 99: 1-66. https://doi.org/10.3897/phytokeys.99.23713

Figure 8 Helictosperma malacophylla: pyrene and seed. A pyrene showing four preformed germination slits, lateral view B pyrene falling apart into four valves along preformed germination slits, lateral view C seed, adaxial view, with embryo position indicated D transverse section through seed. A–D coll. ignot. 19146-SF.