Jepson eFlora
Key to families | Table of families and genera

Key to Gentianaceae

View taxon page for Gentianaceae

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Base of sinus between corolla lobes truncate or generally with a variously shaped, sometimes fringed appendage, generally > 1 mm wide ..... GENTIANA

1' Base of sinus between corolla lobes unappendaged, acute, << 1 mm wide

2. Corolla ± rotate (bell-shaped), lobed ± to base, nectary pits prominent, fringed

3. Calyx, corolla 4-lobed; cauline leaves opposite or whorled; nectary pits generally 1 per corolla lobe (if 2, stem generally > 1 m, > 1.5 cm diam) ..... FRASERA

3' Calyx, corolla (4)5-lobed; cauline leaves generally (sub)opposite or some alternate; nectary pits 2 per corolla lobestem generally < 1 m, < 1 cm diam ..... SWERTIA

2' Corolla not rotate, with distinct tube, nectary pits 0 (but corolla sometimes with fringes or scales, nectaries sometimes elsewhere)

4. Corolla widely bell-shaped, lobes >> tube ..... EUSTOMA

4' Corolla narrowly or not bell-shaped, lobes <= tube

5. Calyx not appressed to, much wider than corolla tube; corolla yellow ..... CICENDIA

5' Calyx ± appressed to, not much wider than corolla tube; corolla pink, blue, violet, or white

6. Corolla salverform, white or generally pink

7. Stigmas 2, elliptic to ovate ..... CENTAURIUM

7' Stigmas 1, 2-lobed, or 2, stigmas or lobes wedge- to fan-shaped ..... ZELTNERA

6' Corolla not salverform, generally blue to violet or white

8. Corolla (17)20–55 mm, lobes ± entire to serrate, jagged, or fringed, without fringes or scales on adaxial surface ..... GENTIANOPSIS

8' Corolla < 20 mm, lobes ± entire, with fringes or scales on adaxial surface near base

9. Flowers 1, terminal on branches, parts generally in 4s; pedicels generally >> subtending internode ..... COMASTOMA

9' Flowers in terminal, also sometimes subterminal cymes, parts generally in 5s; pedicels generally < subtending internode ..... GENTIANELLA


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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