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

Key to Amsinckia

View taxon page for Amsinckia

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

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

1. Calyx  unequal in width, 2–4 from fusion below middle, notched at tip; corolla tube generally 20-veined near base; nutlet generally smooth, cobblestone-like, or round-tubercled (except Amsinckia spectabilis var. spectabilis)

2. Stem glabrous to sparse-coarse-hairy, glaucous, ± white to pink below;  glaucous; nutlet smooth, adaxially with longitudinal slit-like groove, attachment  hidden

3. Corolla 12–22 mm, limb 8–14 mm diam, generally orange; generally heterostylous; nutlet 3–4 mm, , groove  at base ..... A. furcata

3' Corolla 8–12 mm, limb 2–6(8) mm diam, yellow (to orange-yellow); homostylous; nutlet 4–6 mm, , groove unforked at base ..... A. vernicosa

2' Stem hairy, not glaucous, ± green below; leaf not glaucous; nutlet smooth, cobblestone-like, or tubercled, adaxially without slit-like groove, attachment scar exposed

4. Nutlet 1.5–2 mm, ± black; leaf fine-toothed; stem generally ; coastal dunes or occasionally sandy bluffs ..... A. spectabilis var. spectabilis (2)

4' Nutlet 2.5–5 mm, gray to brown; leaf ; stem  to ; inland

5. Corolla 14–22 mm, limb 10–16 mm diam; heterostylous

6. Nutlet gray, dull, cobblestone-like; corolla yellow-orange; SCoR, w WTR ..... A. douglasiana

6' Nutlet ± brown, smooth, shiny; corolla red-orange; nw SnJV ..... A. grandiflora

5' Corolla 8–16 mm, limb 2–10 mm diam; homostylous ..... A. tessellata

7. Corolla 12–16 mm, limb 6–10 mm diam; anthers not  to, generally below stigma ..... var. gloriosa

7' Corolla 8–12 mm, limb 2–6 mm diam; anthers appressed to stigma ..... var. tessellata

1' Calyx lobes ± equal in width, 5, not fused above base (except Amsinckia spectabilis var. spectabilis); corolla tube 10-veined near base; nutlet generally sharp-tubercled, often ridged

8. Nutlet 1–2 mm; leaf ± succulent, fine-toothed ..... A. spectabilis

9. Stem erect; calyx lobes not fused above base; nutlet 1–1.5 mm; heterostylous ..... var. microcarpa

9' Stem generally decumbent; calyx lobes generally 2–3, ± 1/2-fused; nutlet 1.5–2 mm; heterostylous or homostylous ..... var. spectabilis (2)

8' Nutlet 2–4 mm; leaf not succulent, generally entire

10. Corolla , tube bent, limb generally with 2 dark spots ..... A. lunaris

10' Corolla , tube straight, limb with 0 or 5 dark spots

11. Corolla throat ± closed by 5 hairy appendages, tube constricted in lower 1/2; stamens attached below middle of corolla tube, style  ..... A. lycopsoides

11' Corolla throat open, glabrous, appendages 0, tube not constricted; stamens generally attached above middle of corolla tube, if below then style 

12. Corolla 10–20 mm, limb 8–14 mm diam; style generally ± exserted; anthers not appressed to, generally below stigma (if stigma at bottom 1/3 of tube, then anthers above stigma, at throat) ..... A. eastwoodiae

12' Corolla 4–11 mm, limb 1–10 mm diam; style not exserted; anthers generally appressed to stigma

13. Stem erect, ± gray, appressed to  hairs below present; leaf ± gray, hairs appressed to ascending; corolla ± yellow ..... A. retrorsa

13' Stem decumbent to erect, green to brown, appressed to reflexed hairs below ± 0; leaf green, hairs ± not appressed to ascending; corolla ± orange

14. Stem ascending to erect; corolla 7–11 mm, limb 4–10 mm diam, ± orange, tube exserted ..... A. intermedia

14' Stem decumbent to ± ascending; corolla 4–7 mm, limb 1–3 mm diam, yellow to orange-yellow, tube ± exserted ..... A. menziesii


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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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