Two ships of the Royal Navy have borne the name Pentstemon (or Penstemon) after the flower:

• HMS Pentstemon (1916), an Arabis-class sloop launched in 1916 she was sold in 1920 into mercantile service as Lila. Subsequently, became the Chinese gunboat "Hai Chow" and sunk in 1937.
• HMS Pentstemon (K61), a Flower-class corvette launched in 1941 and sold in 1946 into mercantile service as Galaxidi.

References

• Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8.