Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Johnstonella

View taxon page for Johnstonella

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

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

1. Nutlet margins generally rounded, occasionally ± sharp-angled but not knife-like or ± flat-narrow-rimmed ..... J. angustifolia

1' Nutlet margins sharply angled, knife-like, narrowly winged, or ± flat-narrow-rimmed

2. Nutlets similar (slightly dissimilar), nutlets similar in strength of attachment

3. Stems short-branched throughout; bracts at base of flowers, , long-acuminate, often deciduous 0–0.5 mm in fruitcalyx oblong-ovoid, 4–6 mm in fruit, nutlets 1.2–1.8(–2) mm, margins sharp-angled or generally ± flat-narrow-rimmed..... J. costata

3' Central stem axis prominent; bracts only at base of inflorescence units,  to narrowly ; pedicels 1–1.5 mm in fruit; calyx spheric, 2.5–3.5 mm in fruit; nutlets (1.5–)1.8–2.5 mm, margins narrowly winged ..... J. holoptera

2' Nutlets dissimilar, largest more firmly attached and persistent than similar three

4. Pedicels 1–4(6) mm in fruit, ± loosely  ..... J. racemosa

4' Pedicels <= 0.5–1.5 mm in fruit, generally 

5. Stems canescent-strigose; calyx in fruit ± 2–2.5 mm, larger, persistent nutlet 0.9–1.2 mm ..... J. angelica

5' Stems  and spreading-sharp-bristly; calyx in fruit 2.5–4.0 mm, larger, persistent nutlet 1.4–1.7 mm ..... J. inaequata



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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