| 1 |
Margin of leaves and calyx lobes conspicuously whitish, membranous or cartilaginous. |
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(2) |
| + |
Margin of leaves and calyx lobes neither membranous nor cartilaginous (leaf margin cartilaginous in G. tubiflora). |
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(7) |
| |
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| 2 (1) |
Leaf blade lanceolate, broadly oblong, elliptic, or ovate, apex acuminate to obtuse. |
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(3) |
| + |
Leaf blade obovate to flabelliform, apex rounded to truncate and emarginate. |
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(5) |
| |
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| 3 (2) |
Margin of leaves and calyx lobes membranous, scabrous |
|
85 Gentiana depressa |
| + |
Margin of leaves and calyx lobes cartilaginous, smooth. |
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(4) |
| |
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| 4 (3) |
Corolla 4.5-6 cm, blue-purple; stamens equal |
|
86 Gentiana amplicrater |
| + |
Corolla 2.5-2.8 cm, pale blue; stamens unequal |
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87 Gentiana confertifolia |
| |
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| 5 (2) |
Margin of leaves membranous, minutely lacerate |
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88 Gentiana lacerulata |
| + |
Margin of leaves cartilaginous, not lacerate. |
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(6) |
| |
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|
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| 6 (5) |
Margin of leaves and calyx lobes minutely papillate; corolla 1.5-2 cm; seeds 1.3-1.5 mm |
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90 Gentiana emodii |
| + |
Margin of leaves and calyx lobes smooth; corolla 2-3 cm; seeds 2.3-2.5 mm |
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89 Gentiana urnula |
| |
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|
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| 7 (1) |
Flowers several in a subcapitate inflorescence; petiole of upper leaves conspicuously widened. |
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(8) |
| + |
Flowers generally solitary; petiole slender. |
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(11) |
| |
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|
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| 8 (7) |
Upper pairs of leaves as long as or longer than flowers, clustered, enveloping much of inflorescence; petiole longer or slightly shorter than blades |
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81 Gentiana sikkimensis |
| + |
Upper pairs of leaves shorter than flowers, enveloping only base of inflorescence; petiole poorly defined or much shorter than blades. |
|
(9) |
| |
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|
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| 9 (8) |
Corolla 2-2.6 cm; calyx lobes spreading to recurved; flowering stems erect, without adventitious roots; style 1-2 mm |
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82 Gentiana elwesii |
| + |
Corolla 2.6-3.5 cm; calyx lobes erect; flowering stems decumbent, with adventitious roots from lower nodes; style 3-5 mm. |
|
(10) |
| |
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|
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| 10 (9) |
All leaf blades ovate-oblong to ovate-orbicular; stems papillate; corolla 3-3.5 cm |
|
83 Gentiana chinensis |
| + |
Upper stem leaf blades spatulate to obovate; stems smooth; corolla 2.6-3 cm |
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84 Gentiana harrowiana |
| |
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|
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| 11 (7) |
Calyx lobes oblanceolate-spatulate to orbicular-spatulate, base distinctly narrowed. |
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(12) |
| + |
Calyx lobes not oblanceolate-spatulate to orbicular-spatulate, base scarcely or not at all narrowed. |
|
(13) |
| |
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|
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| 12 (11) |
Corolla 3-3.5(-4.5) cm, with dark blue stripes and spots |
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92 Gentiana gilvostriata |
| + |
Corolla 4.5-5.5 cm, without stripes or spots |
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91 Gentiana stragulata |
| |
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|
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| 13 (11) |
Style 7-14 mm, longer than ovary, filiform. |
|
(14) |
| + |
Style 1.5-5 mm, shorter than ovary, cylindric. |
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(15) |
| |
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|
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| 14 (13) |
Leaf blade spatulate to obovate, apex rounded; calyx lobes lanceolate to narrowly oblong, apex subacute to obtuse |
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93 Gentiana filistyla |
| + |
Leaf blade oblong to elliptic, apex acute to obtuse and sometimes caudate; calyx lobes ovate to triangular, apex acute and sometimes caudate |
|
94 Gentiana tubiflora |
| |
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|
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| 15 (13) |
Corolla 3-3.5 cm. |
|
(16) |
| + |
Corolla to 2.6 cm. |
|
(17) |
| |
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|
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| 16 (15) |
Stolons well developed; leaf blade ovate-elliptic to ovate-orbicular; style 4-5 mm |
|
83 Gentiana chinensis |
| + |
Stolons poorly developed; leaf blade spatulate to obovate; style 1.5-2.5 mm |
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96 Gentiana wardii |
| |
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| 17 (15) |
Stolons well developed; leaf blades of flowering stems narrowly elliptic to ovate-elliptic, those of stolons linear to linear-lanceolate |
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95 Gentiana namlaensis |
| + |
Stolons poorly developed; leaf blades all spatulate to obovate |
|
96 Gentiana wardii |
