silvery spleenwort: fern with elongate silvery outgrowths enclosing the developing spores
fern: any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
costoaxillary vein: one of several veins connecting intercostal veins with the lateral thoracic vein or the thoracoepigastric vein