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1 October 2019 NOTES ON LYTHRUM (LYTHRACEAE) IN CALIFORNIA: LYTHRUM JUNCEUM AS A NEW (BUT OLD) INTRODUCED SPECIES, TYPIFICATION OF GREENE'S LYTHRUM TYPES, AND POSSIBLE HYBRIDIZATION OF LYTHRUM IN CALIFORNIA
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Abstract

The Mediterranean species Lythrum junceum Banks & Sol. is newly reported from California, based on multiple records from southwestern Alameda County and adjacent Santa Clara County. Previous collections, dating to at least 1905, were misidentified as L. californicum Torr. & A.Gray, but differ in their sprawling habit, white-based petals, and purple-spotted hypanthia. Diagnostic features, invasive potential, and speculations on origin are addressed. In addition, two species of Lythrum described from California in 1889 are typified: a lectotype for L. adsurgens Greene and a neotype for L. sanfordii Greene. The possible role of hybridization in the establishment of L. hyssopifolia L. and other introduced species of Lythrum in California is also discussed.

Barbara Ertter and David Gowen "NOTES ON LYTHRUM (LYTHRACEAE) IN CALIFORNIA: LYTHRUM JUNCEUM AS A NEW (BUT OLD) INTRODUCED SPECIES, TYPIFICATION OF GREENE'S LYTHRUM TYPES, AND POSSIBLE HYBRIDIZATION OF LYTHRUM IN CALIFORNIA," Madroño 66(3), 97-102, (1 October 2019). https://doi.org/10.3120/0024-9637-66.3.97
Published: 1 October 2019
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