Jepson eFlora: Key page
Vascular Plants of California
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  between corolla   or generally with a variously shaped, sometimes  appendage, generally > 1 mm wide ..... GENTIANA

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

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

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

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

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

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

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

5. Calyx not  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 , white or generally pink

7. Stigmas 2,  to  ..... 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 ±  to , 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;  generally >> subtending  ..... COMASTOMA

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


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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

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

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