Based on recent molecular work, Polemonium occidentale Greene subsp. lacustre Wherry (Polemoniaceae) is elevated to species rank as P. lacustre (Wherry) J. P. Rose & Sytsma. Key morphological distinctions between this and other species of the clade to which it belongs are summarized.
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22 March 2023
A New Combination for a Narrowly Endemic Polemonium (Polemoniaceae)
Jeffrey P. Rose,
Kenneth J. Sytsma
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eastern North America
Great Lakes
Polemoniaceae
Polemonium