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

Key to Eryngium

View taxon page for Eryngium

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

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

1. Plant stoutbracts and sepals blue-tinged; inner bracts lobed at or distal to middle ..... E. articulatum

1' Plant slender to stout,  to erect; bracts and sepals green, styles or anthers occasionally blue; inner bracts not lobed

2. Bract margins thickened, marginal spines 0

3. Leaf generally unlobed, margin sharply  to irregularly cut ..... E. armatum

3' Leaf pinnately to bipinnately lobed

4. Plant , ± green; main stem branched 1–6 cm distal to ; SCo ..... E. pendletonense

4' Plant erect, silvery; main stem branched 7–32 cm distal to rosette; n&c SNF ..... E. pinnatisectum

2' Bract margins not thickened, at least outer generally with spines

5. Leaf  >> , deeply pinnately or bipinnately lobed,  broad to narrow

6. Sepals pinnately lobed or toothed to  to tip-spine

7. Bracts spiny on margin and abaxial surface; fruit scales lanceolate,  ..... E. castrense

7' Bracts spiny on margins only, or 0–few abaxially; fruit scales  to  ..... E. spinosepalum

6' Sepals generally entire, ovate, abruptly narrowed to tip-spine ..... E. vaseyi

8. Main stem branching 1–5 cm distal to rosette; sepal tips erect; n SNF, se ScV, ne SnJV ..... var. vallicola

8' Main stem 0, plant branched within rosette; sepal tips generally ; SCoRO ..... var. vaseyi

5' Leaf blade < petiole or petiole ± 0,  spiny-margined to , serrate or irregularly cut, lobes 0 or shallow, broad

9. Plant prostrate or decumbent, with roots and juvenile leaves at inflorescence raceme-like ..... E. racemosum

9' Plant decumbent to erect, not rooting nor with juvenile leaves at nodes; inflorescence cyme-like

10. Bracts with many spines on margins and abaxial surface ..... E. mathiasiae

10' Bracts with 0 or few spines on abaxial surface

11. Main stem generally 0, plant branched within rosette;  leaves generally > branches ..... E. alismifolium

11' Main stem present, branched distal to base; basal leaves < branches

12. Plant densely  throughout; heads 5–7-flowered ..... E. constancei

12' Plant glabrous, or occasionally puberulent only on leaves or bracts; heads > 10-flowered

13. Plant stout, erect; leaf blade tapering to base, petiole obscure; sepal tip-spine generally 1–2 mm; outer bracts > 2 × inner bracts ..... E. jepsonii

13' Plant slender to stout, decumbent to erect; leaf blade abrupt-narrowed at base, < petiole; sepal tip-spine < 1 mm; outer bracts < 2 × inner bracts ..... E. aristulatum

14. Styles in fruit >> calyx; NCo, NCoR, ScV, SnFrB ..... var. aristulatum

14' Styles in fruit ± = calyx; SnFrB, SCoR, SW

15. Bract margins spiny ..... var. hooveri

15' Outer  margin spines 0–3 pairs, inner bract spines 0 ..... var. parishii



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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