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Key to EryngiumView 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 stout, erect  Upright; vertically oriented. ; bracts and sepals blue-tinged; inner bracts lobed at or distal to middle ..... E. articulatum 1' Plant slender to stout, prostrate  Lying flat on the ground. 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 serrate  Having margins with sharp, fine to coarse teeth generally pointing tipward, not outward; margins with such teeth on such primary teeth are doubly serrate. to irregularly cut ..... E. armatum 3' Leaf pinnately to bipinnately lobed 4. Plant decumbent  lying mostly flat on the ground but with tips curving up. , ± green; main stem branched 1–6 cm distal to rosette  A radiating cluster of leaves generally at or near ground level. ; SCo ..... E. pendletonense 2' Bract margins not thickened, at least outer generally with spines 5. Leaf blade  Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped. >> petiole  Leaf stalk, connecting leaf blade to stem; sometimes more or less indistinct. , deeply pinnately or bipinnately lobed, lobes  1. A major expansion or bulge, such as on the margin of a leaf, sepal, or petal, or on the surface of an ovary. 2. The free tips of otherwise fused structures, such as sepals or petals; larger than teeth. broad to narrow 6. Sepals pinnately lobed or toothed to entire  Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). , lanceolate  Narrowly elongate, widest in the basal half, often tapered to an acute tip. , tapered  Gradually (not abruptly) narrower or smaller at base or tip. to tip-spine 7. Bracts spiny on margin and abaxial surface; fruit scales lanceolate, acuminate  Having a long-tapered, sharp tip, the sides concave. ..... E. castrense 7' Bracts spiny on margins only, or 0–few abaxially; fruit scales oblong  Longer than wide, with nearly parallel sides; wider than linear. to ovate  Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf. , acute  Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle. ..... E. spinosepalum 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 reflexed  Abruptly bent or curved downward or backward. ; SCoRO ..... var. vaseyi 5' Leaf blade < petiole or petiole ± 0, leaf  Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets). spiny-margined to dentate  Having margins with sharp, relatively coarse teeth pointing outward, not tipward. , serrate or irregularly cut, lobes 0 or shallow, broad 9. Plant prostrate or decumbent, with roots and juvenile leaves at nodes  Position on a stem from which one or more structures (especially leaves, buds, branches, or flowers) arise. ; inflorescence raceme-like ..... E. racemosum 9' Plant decumbent to erect, not rooting nor with juvenile leaves at nodes; inflorescence cyme-like 10' Bracts with 0 or few spines on abaxial surface 11. Main stem generally 0, plant branched within rosette; basal  At or near the base of a plant or plant part. Especially said of leaves clustered near the ground or of a placenta confined to the base of an ovary. leaves generally > branches ..... E. alismifolium 11' Main stem present, branched distal to base; basal leaves < branches 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; SnFrB, SCoR, SW 15' Outer bract  Reduced, leaf- or scale-like structure subtending a branch, cone scale, peduncle, pedicel, or flower. margin spines 0–3 pairs, inner bract spines 0 ..... var. parishii
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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, http://ucjeps.berkeley.edu/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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