Jepson eFlora
Key to families | Table of families and genera

Key to Gentiana

View taxon page for Gentiana

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

1. Annual, biennial; stem < 1 dm, leaf < 15 mm, flower < 2 cm (sect. Chondrophyllae)

2. Basal, cauline leaves not alike, upper cauline strongly ascending, much narrower than basal, margins of all leaves white; corolla white to pale blue, abaxially often dark blue ..... G. fremontii

2' Basal, cauline leaves ± alike, ± spreading, margins not or ± white; corolla medium to deep blue ..... G. prostrata

1' Perennial herb; stem generally > 1 dm; leaf > 15 mm; flower > 2 cm (sect. Pneumonanthe)

3. Stems arising laterally from caudex, below rosettes

4. Stems 20–45 cm; internodes > middle, upper cauline leaves; corolla sinus appendages divided into 2–3 thread-like, entire segments ..... G. setigera

4' Stems 0.5–10(35) cm; internodes generally < cauline leaves; corolla sinus appendages divided into 2 triangular, ± serrate to jagged-cut parts tapered to thread-like tips ..... G. newberryi

5. Corolla generally medium to deep blue ..... var. newberryi

5' Corolla white to pale blue, abaxially dark brown-purple on, below lobes ..... var. tiogana

3' Stems arising terminally from caudex, without rosettes

6. Sinus between corolla lobes ± unappendaged ..... G. sceptrum

6' Sinus between corolla lobes with a conspicuous toothed or fringed appendage

7. Corolla sinus appendages divided ± to base into 2–several thread-like parts; leaf-base sheaths at mid-stem generally > 5 mm ..... G. plurisetosa

7' Corolla sinus appendages divided into generally 2 parts, each thread-like only toward tip; leaf-base sheaths at mid-stem generally < 5 mm

8. Leaf, calyx-lobe margins ± entire, minutely ciliate; calyx lobes generally < 1.5 mm wide; corolla lobes generally < 7 mm; inflorescences terminal, generally also at 1–6 upper nodes, flowers 1–7 ..... G. affinis var. ovata

8' Leaf, calyx-lobe margins generally obscurely, minutely dentate, not ciliate; calyx lobes generally > 2 mm wide; corolla lobes 5.5–13 mm; inflorescences generally terminal, also at 1–3 upper nodes or not, flowers 1–few ..... G. calycosa


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].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.