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FOC | Family List | FOC Vol. 16 | Gentianaceae

9. Gentiana Sect. Stenogyne Franchet, Bull. Soc. Bot. France. 31: 375. 1884.

狭蕊组 xia rui zu

Annuals, rarely perennials. Petioles of stem leaves 0.5-1 mm, entirely connate. Calyx keeled or winged. Plicae asymmetrical, very oblique. Style filiform, longer to slightly shorter than the ovary. Capsules cylindric, wingless. Seeds triquetrous with three winged edges, rarely wingless or areolate; seed coat reticulate.

Fourteen species: Asia; 12 species in China.

1 Plicae margin fringed.   (2)
+ Plicae margin erose, denticulate, or short laciniate.   (4)
2 (1) Annuals; calyx tube with broad wings; corolla 2.3-2.5 cm   107 Gentiana alata
+ Perennials; calyx tube with narrow wings or merely sharply ridged along veins; corolla 2.5-4.5 cm.   (3)
3 (2) Stems, leaves, and calyces densely white and purple pilose; calyx tube prominently veined but not winged   106 Gentiana villifera
+ Plant glabrous or puberulent on petioles and leaf veins only; calyx tube narrowly winged   108 Gentiana rhodantha
4 (1) Corolla yellow, greenish yellow, or yellowish white.   (5)
+ Corolla pale to dark blue, violet, or purple.   (6)
5 (4) Corolla tube outside puberulent along veins, sometimes purple suffused but not distinctly striped; lobes slightly acuminate to subacute; plicae horizontally truncate, margin erose; stamens inserted near base of corolla tube   110 Gentiana souliei
+ Corolla tube glabrous, distinctly dark striped; lobes long acuminate to caudate; plicate obliquely truncate, margin denticulate; stamens inserted at middle of corolla tube   109 Gentiana striata
6 (4) Calyx tube angled, sometimes with slightly rough sharp ridges but without conspicuous wings.   (7)
+ Calyx tube conspicuously winged.   (9)
7 (6) Corolla blue, 2.5-3.2 cm, tubular to funnelform; limb to 12 mm wide   111 Gentiana leptoclada
+ Corolla violet to purple, 1-2 cm, salverform; limb 7-10 mm wide.   (8)
8 (7) Calyx lobes subulate; plicae triangular, 2.5-3 mm, margin erose   112 Gentiana primuliflora
+ Calyx lobes narrowly ovate to triangular; plicae lanceolate, 4-6 mm, margin denticulate   113 Gentiana expansa
9 (6) Corolla 3-4.5 cm; calyx lobes narrowly elliptic, lanceolate, or ovate-lanceolate, base narrowed.   (10)
+ Corolla 2.2-3 cm; calyx lobes linear to subulate, base not narrowed.   (11)
10 (9) Leaf blade 1.3-2.5 cm; internodes 3-8 cm; calyx tube broadly winged; corolla lobes obtuse; seeds broadly winged   114 Gentiana pterocalyx
+ Leaf blade 0.7-1.2 cm; internodes 1-2.5 cm; calyx tube narrowly winged; corolla lobes acuminate; seeds narrowly winged or wingless   115 Gentiana eurycolpa
11 (9) Leaves toward stem apex adaxially hispidulous on veins; plicae margin erose; ovary gynophore 8-10 mm   116 Gentiana gentilis
+ Leaves all adaxially glabrous; plicae margin denticulate; ovary gynophore 5-7 mm   117 Gentiana serra

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