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, 

lanceolate 

Narrowly elongate, widest in the basal half, often tapered to an acute tip.

, long-acuminate, often deciduous; 

pedicels 

Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit.

0–0.5 mm in fruit; calyx 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, 

linear 

Elongate, with nearly parallel sides; narrower than elliptic or oblong.

to narrowly 

elliptic 

In the shape of a flattened circle or ellipse; wider than linear

; 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 

spreading 

Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal.

..... J. racemosa

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

ascending 

Curving or angling upward from base, or about 30-60 degrees less than vertical or away from axis of attachment.

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

5' Stems 

strigose 

With stiff, straight, sharp, appressed hairs.

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

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