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.
JEFFREYI. Bot. Specif. name of a Californian pine, Pinus jeffreyi (1853 A. Murray in Report on Oregon Expedition II. 28).
[After John Jeffrey, of Lochore, a gardener on the Expedition who discovered it.]