Jepson eFlora
Key to families | Table of families and genera

Key to Vaccinium

View taxon page for Vaccinium

(For a list of species in Vaccinium, use the above link.)

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

1. Leaves evergreen, leathery, veins not prominent abaxially; pedicel jointed to flower; filaments ± hairy

2. Plant < 1.5 dm, branches slender; leaf generally 7–17 mm, ± entire; corolla lobes >> tube, reflexed when anthers open ..... V. macrocarpon

2' Plant 5–30 dm, branches stout; leaf 20–50 mm, serrate; corolla lobes < tube, erect to spreading when anthers open ..... V. ovatum

1' Leaves deciduous (rarely evergreen in young plants of Vaccinium parvifolium), thin or ± thick, veins generally prominent abaxially; pedicel not jointed to flower; filaments glabrous

3. Leaf entire; calyx lobes generally > tube, persistent; twigs not angled, not green; flowers 1–4 on leafless older shoots ..... V. uliginosum subsp. occidentale

3' Leaf serrate or minutely so (but see Vaccinium parvifolium); calyx lobes ± 0 or generally < tube, deciduous; twigs angled or not, green or not; flowers often 1 in axils of lowest leaves of youngest shoots

4. Twigs not or weakly angled, ± green or yellow-green but not green; fruit not red (rarely dark red in Vaccinium membranaceum)

5. Plant generally 5–15 dm; twigs weakly angled; leaf generally ovate to elliptic or obovate, 2–5 cm, thin, membranous, base often rounded to truncate, tip acute ..... V. membranaceum

5' Plant generally < 5 dm; twigs not or weakly angled; leaf generally oblong or elliptic to obovate or oblanceolate, rarely elliptic, generally 1–3.5 cm, generally thin but not membranous, base tapered, tip seldom acute

6. Youngest twigs generally puberulent or glandular; leaf not glaucous, generally oblong or obovate to elliptic; corolla narrowly urn-shaped; fruit < 9 mm wide ..... V. cespitosum

6' Youngest twigs generally glabrous, glaucous; leaf glaucous, obovate to oblanceolate (elliptic); corolla ± spheric; fruit > 9 mm wide ..... V. deliciosum

4' Twigs strongly angled, green; fruit red to dark blue or purple

7. Leaf margins rolled under, ciliate, bristles 0.2–0.6 mm; berry dark blue, glaucous; hypanthium scar > 3/4 width of berry ..... Vaccinium shastense

8. Persistent calyx ring on berry 0.4–1.0 mm; plant generally decumbent, often rhizomatous; flowers pale pink to greenish; west slope High Sierra Nevada..... subsp. nevadense

8' Persistent calyx ring on berry 0.2–0.5 mm; plant generally erect, occasionally rhizomatous; flowers bright to pale pink; e Klamath Ranges (w Shasta Co.)..... subsp. shastense

7' Leaf margins flat, generally not ciliate; berry red, not glaucous; hypanthium scar to 1/2 width of berry.

9. Plant erect shrub, 10–40 dm, generally not rhizomed; leaf entire to serrate or with only deciduous, sharp point at tip, abaxially (especially midvein) puberulent ..... V. parvifolium

9' Plant brushy shrub, < 5 dm, rhizomed; leaf serrate, abaxially glabrous ..... V. scoparium

Contact/Feedback

Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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.