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Oenothera drummondii Hooker. Drummond's Evening-primrose. Phen: Apr-Oct. Hab: Sandy ocean beaches, disturbed areas; eastwards perhaps only introduced or adventive from the western Gulf Coast. Dist: Se. NC south to s. FL, west to se. TX, and south to c. Mexico (BCS, HGO, QRO, SLP, SON, TAB, TAM, VER); occurrences eastwards (from FL, SC, and NC) are sometimes considered adventive, but in habitat are entirely plausible as native occurrences. All inland occurrences should be considered adventive. O. thalassaphila Brandegee is restricted to the southern tip of Baja California.

Origin/Endemic status: Native

Taxonomy Comments: There seems no compelling reason to treat the Baja California Sur endemic O. thalassaphila Brandegee as only subspecifically distinct from O. drummondii. Multiple morphological distinction, in addition to the highly disjunct distribution (Pacific coast of Mexico vs. Caribbean and Atlantic coasts of the US and Mexico) argue for specific recognition.

Synonymy: = Oenothera drummondii Hook. ssp. drummondii – FNA10, Dietrich & Wagner (1988), Wagner, Hoch, & Raven (2007); = Oenothera drummondii Hook. var. drummondii – Munz (1965); < Oenothera drummondii Hook. – Fl4, K1, K3, K4, Mex, RAB, S13, Tx, WH3; < Raimannia drummondii (Hook.) Rose ex Sprague & Riley – S

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Heliophily: 9

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