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| 1 |
Flowers 4-merous; keeled midveins of calyx lobes decurrent as conspicuous wings on tube. |
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(2) |
| + |
Flowers 5-merous; calyx lobes and tube not keeled or winged. |
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(3) |
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| 2 (1) |
Corolla 2--3.5 cm; stamens inserted near base of corolla tube |
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97 Gentiana lineolata |
| + |
Corolla 3.5--6 cm; stamens inserted at middle of corolla tube. |
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98 Gentiana praeclara |
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| 3 (1) |
Plants 3-5(-10) cm tall, much branched from base, branches spreading or decumbent; leaf blade orbicular to reniform; flowers solitary at ends of branches; stamens equal. |
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(4) |
| + |
Plants often taller, with 1 to several ± erect stems, if decumbent usually not branched near base; leaf blade linear, lanceolate, spatulate, narrowly elliptic, or obovate; flowers in terminal an often also axillary clusters; stamens unequal. |
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(6) |
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| 4 (3) |
Corolla yellow, with dark blue streaks and spots, (1.4-)2-2.4 cm; stamens inserted at middle of corolla tube |
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105 Gentiana tongolensis |
| + |
Corolla blue or dark purple, without streaks or spots, (0.8-)1-2 cm; stamens inserted at apical part of corolla tube. |
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(5) |
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| 5 (4) |
Corolla dark purple; plicae ovate, margin denticulate; style 1.2-1.5 mm; capsule included in corolla; seed coat alveolate |
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103 Gentiana atropurpurea |
| + |
Corolla light blue; plicae strongly oblique and auricular to triangular, margin entire; style 4-7 mm; capsule usually exserted |
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104 Gentiana vernayi |
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| 6 (3) |
Leaves densely crowded at apex of branches, subtending clusters of flowers (or stems very short, terminating in a cluster of flowers subtended by a several pairs of leaves); flowers mostly confined to terminal clusters; corolla dark blue or violet, without conspicuous streaks or spots |
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99 Gentiana delavayi |
| + |
Leaves ± evenly spaced along stem; flowers in terminal and axillary clusters along upper half or more of stem; corolla yellow or pale blue, with dark blue streaks and spots. |
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(7) |
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| 7 (6) |
Leaf blade linear; calyx lobes linear |
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100 Gentiana picta |
| + |
Leaf blade spatulate to obovate; calyx lobes narrowly elliptic or suborbicular. |
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(8) |
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| 8 (7) |
Calyx lobes narrowly elliptic, unequal; style 2-3 mm |
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101 Gentiana yunnanensis |
| + |
Calyx lobes suborbicular, equal; style 3.5-5.5 mm |
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102 Gentiana suborbisepala |
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