asclepias gigantea l.common names bowstring hemp, calotrope, crownplant, giant calotrope, giant milkweed, giant rubber bush

flower people plant nature close-up leaf freshness milkweed growth springtime blossom branch head summer tree environment bright botany beauty tropical climate large backgrounds bud calotropis gigantea crown asclepias common names l common bowstring hemp calotrope crownplant giant rubber bush