nephrolepis abrupta fern and stereocaulon vulcani , first vegetals growing after recent lava flows of piton de la fournaise,

vegetal power pioneer vegetation lava flows eruption fournaise reunion piton active volcano nephrolepis abrupta fougere plume basalt rock basaltic stereocaulon vulcani moss ferns fronds indian ocean biology botany plants desolated landscape grand brule saint philippe polypodiaceae france volcanic sainte rose road fern vegetals growing island