delta arrowhead

== English == === Etymology === By surface analysis, delta +‎ arrowhead (“Sagittaria sp.”). === Noun === delta arrowhead (plural delta arrowheads) Sagittaria platyphylla, a certain alismataceous plant which grows in shallow waters, native to parts of the United States. === References === Ajilvsgi, Geyata (2003), Alison Tartt, editor, Wildflowers of Texas, revised edition, Texas: Shearer Publishing, →ISBN, delta arrowhead (Sagittaria platyphylla), page 5