Star cushion alga in a rock pool. Cape Agulhas, Western Cape (2020) - iNaturalist Plants yellow-brown, forming thin, globose cushions of compacted branching tubes, irregularly furrowed and convoluted. Surface covered with knobbly protuberances. Thalli at first solid but older plants becoming hollow in the center. Up to 10 cm in diameter and 3 to 4… Continue reading Starred cushion (Iyengaria stellata)