asteracantha auriculata flower at attaragoda wetland

6-8 acanthaceae armed astera asteracantha attaragoda auri auriculata axillary belong blossom blue bra bracts corolla erect family flower flowers food garden grass green herb ikiriya katu lanceolate lawn leaf meadow moist nature normally peren perennial petal places plant produce purplish shrub spi spines stem wet wetland whorl wildflower