Scottish National Dictionary (1700–)
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First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.
HOUSTONIA. Bot. Bluet, N. American herbs of the madder family.
[Called by Linnaeus after William Houstoun (1695–1733), a Scotsman, surgeon and plant collector in Central America and West Indies.]