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FOC | Family List | FOC Vol. 16 | Gentianaceae

1. Gentiana Sect. Otophora Kusnezow, Trudy S.-Peterburgsk. Obshch. Estestvoisp., Otd. Bot. 24(2): 102. 1894.

爪耳木属 er zhe long dan zu

Perennials. Taproot cylindric or fusiform, stout, slightly fleshy. Stem branching monopodially. Corolla usually lobed to middle or below; tube as long as or shorter than lobes (except in Gentiana doxiongshangensis); plicae reduced to a small tooth or auricle on side of lobe. Anthers ellipsoid. Seed coat usually minutely reticulate, rarely alveolate with simple shallow hexagonal pits.

Twelve species: Bhutan, China, NE India, Nepal; nine species in China.

1 Corolla lobes distinctly shorter than tube.   (2)
+ Corolla lobes about as long as or longer than tube.   (4)
2 (1) Basal rosettes present at flowering time, with leaves almost 3 × as long as larger stem leaves; stem leaves 3-5 pairs, 7-11 mm; corolla 1.7-2.2 cm; seed coat alveolate   5 Gentiana doxiongshangensis
+ Basal rosettes absent or poorly developed, with leaves only slightly larger than stem leaves; stem leaves numerous, 1.5-4 mm; corolla (0.4-)0.7-1.5 cm; seed coat minutely reticulate.   (3)
3 (2) Stem leaf blades 3.5-4 mm; calyx tube 5-6 mm, lobes 3-3.5 mm; corolla white or pale yellow-white; plicae triangular, 2-2.5 mm   2 Gentiana leucantha
+ Stem leaf blades 1.5-3 mm; calyx tube 2-2.5 mm, lobes 1.8-2.2 mm; corolla dark blue; plicae auricular, 0.3-0.5 mm   4 Gentiana infelix
4 (1) Basal rosettes absent at flowering time or poorly developed, with leaves no larger than those of flowering stems; stem leaves numerous; corolla blue or blue-purple, rarely yellow.   (5)
+ Basal rosettes well developed at flowering time, larger rosette leaves usually more than twice as long as leaves of flowering stems; stem leaves 2-5 pairs; corolla white or pale yellow with pale blue streaks and/or spots.   (6)
5 (4) Apex of leaf blades and calyx lobes acuminate, with an aristate tip to 1 mm   1 Gentiana caryophyllea
+ Apex of leaf blades and calyx lobes acute to obtuse, without an aristate tip   3 Gentiana decorata
6 (4) Basal leaf blades 5-12 × (0.8-)1-2.5 cm; flowers usually in axillary or terminal cymes, occasionally solitary   7 Gentiana otophora
+ Basal leaf blades 1-5 × 0.2-1.2 cm; flowers usually solitary, rarely in cymes of 2 or 3 in G. sichitoensis.   (7)
7 (6) Corolla 2.5-3 cm, lobes about as long as tube   8 Gentiana otophoroides
+ Corolla 1.6-2 cm, lobes distinctly longer than tube.   (8)
8 (7) Basal leaf blades linear to oblanceolate, 2-4 mm wide; stem leaf blades linear-lanceolate to ovate-lanceolate, 2-3 mm wide   6 Gentiana damyonensis
+ Basal leaf blades spatulate to oblong-spatulate, 7-12 mm wide; stem leaf blades ovate to suborbicular, 6-8 mm wide   9 Gentiana sichitoensis

Lower Taxa


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