ratite: flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
vertebrate: animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
aphyllanthes: one species; small fibrous-rooted perennial with rushlike foliage and deep blue flowers; sometimes placed in its own family Aphyllanthaceae