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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Pinguicula

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1 Expanded corolla < 1.5 cm across; palate not exserted from the throat of the corolla; rosettes usually 2-4 cm in diameter; flowers usually white to pale violet (rarely medium violet or yellow); seeds 0.4 mm long
1 Expanded corolla > 1.8 cm across; palate markedly exserted from the throat of the corolla; rosettes usually 5-10 (-15) cm across; corolla yellow, violet, or white; seeds (0.4-) 0.5-0.8 mm long.
  2 Corolla yellow
  2 Corolla lavender-blue or white.
    3 Hairs on the lower portion of the scape elongated, pointed, multicellular, nonglandular, transitioning upward to 1-celled glandular hairs; expanded portion of corolla markedly ‘veiny’ (darker along the veins); [of se. NC southward to s. peninsular FL and e. Panhandle FL]
    3 Hairs throughout scape glandular; expanded portion of corolla not ‘veiny’; [collectively of sw. GA and FL Panhandle westward to s. MS].
      4 Fresh leaves dull red or reddish green; corolla lobes ca. 2× as long than broad, the lobes notched about 1/2 their length
      4 Fresh leaves bright yellow-green; corolla lobes ca. 1× as long than broad, the lobes notched about 1/4 their length
        5 Corolla tube violet, with darker violet veins; hairs of the inner corolla tube white
        5 Corolla tube yellow, with reddish-brown veins; hairs of the inner corolla tube yellow
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