An aquatic herbaceous flowering plant widely distributed in North America, the West Indies, northern South America, East Asia, Australia, the Indian Subcontinent, and parts of Africa (Brasenia schreberi).

A "wall" of overlapping shields formed by medieval soldiers standing next to each other

plural of shield wall

plural of shield-skipper

Any of various hesperiid butterflies of the genus Signeta.

The ozone layer; a region of the stratosphere containing a relatively high concentration of ozone.

plural of shield fern

plural of chin shield

Any of the scales found on the underside of a snake's head towards the anterior and touching the lower labial scales.

Dryopteris (buckler ferns) / Lastreopsis spp. / Polystichum spp.