| Number of leaves | unifoliate | unifoliate to plurifoliate | unifoliate, rarely plurifolate |
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| Leaf (cm) | 5–18 × 2–7 | 11–28 × 7.5–22.5 | 6–32 × 2.5–30 |
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| Inflorescence length (cm) | 6.5–19 | 3.5–20 | 7–26 |
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| Number of inflorescences | 1–2 per plant | 3–6 per plant | 1–6 per plant |
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| Pedicel length (mm) | 10–18(–25) | 10–30(–40) | 10–25 |
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| Hairs on pedicel | glandular with shorter eglandular hairs intermixed | glandular with eglandular hairs intermixed | usually eglandular-pubescent |
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| Calyx (mm) | 4–6 | 2.5–6 | 2–3.5(–6) |
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| Hairs on calyx | glandular-pubescent | eglandular-pubescent, few glandular hairs at base | eglandular-pubescent |
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| Corolla colour | blue-violet with whitish palate | pale to mid blue violet with dark blotching on paler palate | pale to mid-blue violet with pale palate |
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| Corolla length (mm) | 17–24 | 22–33 | (20–)25–37 |
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| Hairs on corolla | glandular-pubescent | glandular-pilose | eglandular-pubescent |
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| Tube length (mm) | 9–13 mm | 10–17 mm | 12–25(–30) |
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| Upper lip length (mm) | 4–6 | 5.5–7(–10) × 5–7(–9) | 4–7 × 5–9 mm |
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| Lower lip length (mm) | 7–10 | 14–21 | 12–16 |
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| Lateral lobes (mm) | 5.5 × 4.5 | 7–9.5 × 9–10.5 | 4.5–9 × 5.5–9.5 |
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| Median lobe (mm) | 6 × 5 | 8.5–10 × 10–11 | 5–9 × 5.5–10 |
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| Filaments (mm) | 2 | 2.5–3 | 2–3 |
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| Anthers (mm) | 1.5 | 1.2 | 0.75–1.1 |
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| Staminode | minute, ca 0.5 mm | minute | minute |
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| Ovary and style (mm) | 4–7, ovary glandular, style eglandular | 5–7.5, 1–2, glandular or glabrous, style glandular | 5–9, 1.5–2, eglandular |
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| Stigma | bilobed | bilobed | capitate |
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| Fruit (mm) | 20–22 × 2 | 30–45(–50) × 1.5–1.7 | (25–)40–55(–70) × 1.5–1.7 |
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