Jepson eFlora
Key to families | Table of families and genera

Key to Verbena

View taxon page for Verbena

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

1. Corolla 8–14 mm, limb 6–10 mm wide; calyx 5–9.5 mm

2. Leaves 3–5-lobed; calyx hairs spreading ..... V. gooddingii

2' Leaves 1–2-pinnately dissected; calyx hairs appressed ..... V. pulchella

1' Corolla 1.5–6 mm, limb < 5 mm wide; calyx 2–4.5 mm

3. Flower bract 4–8 mm, 2–4 mm > calyx; stem prostrate to decumbent ..... V. bracteata

3' Flower bract 1–4.5 mm, generally <= calyx; stem generally ascending to erect

4. Most cauline leaf blades 1–2-lobed (lobes proximal to mid-blade 8–25 mm deep), toothed

5. Herbage generally sparsely strigose; calyx minutely strigose ..... V. menthifolia

5' Herbage and calyx short-spreading-hairy ..... V. lasiostachys (2)

6. Leaf adaxial face gray-green, generally ± soft-hairy; nutlet scar ± brown, ± rough at 20× ..... var. lasiostachys

6' Leaf adaxial face green, generally stiff-hairy; nutlet scar white-papillate at 20× ..... var. scabrida

4' Most cauline leaf blades generally unlobed (except some Verbena hastata), entire or generally toothed, teeth 2–8 mm

7. Lower and mid-cauline petioles generally 1–2.5 cm, occasionally narrowly winged

8. Petioles, inflorescence axis, calyx short-spreading-(generally soft-) hairy (see 6. for varieties) ..... V. lasiostachys (2)

8' Petioles, inflorescence axis, and calyx strigose or scabrous

9. Fruits generally overlapping (axis with 8–10 fruits per cm); leaves rough-puberulent, sparsely short-bristly or ± scabrous adaxially ..... V. hastata

9' Fruits not overlapping, especially below (axis generally with < 8 fruits per cm); leaves strigose to scabrous adaxially ..... V. scabra

7' Lower and mid-cauline petioles generally 0, blade sessile or ± clasping

10. Fruits not overlapping (especially separated proximal to mid-inflorescence); flower bracts 3.5–4 mm; calyx 4–4.5 mm; spikes 1–5 per cluster ..... V. californica

10' Fruits generally overlapping along inflorescence; flower bracts 3–3.5 mm; calyx 3–3.5 mm; spikes generally (1)3–17 per cluster

11. Leaf base cordate to truncate, generally clasping; spikes ± 5–6 mm diam in fruit ..... V. bonariensis

11' Leaf base ± acute, subsessile; spikes 3–4 mm diam in fruit ..... V. litoralis


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].
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