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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 erect, silvery; main stem branched 7–32 cm distal to rosette A radiating cluster of leaves generally at or near ground level. ; n&c SNF ..... E. pinnatisectum 4' Plant decumbent lying mostly flat on the ground but with tips curving up. , ± green; main stem branched 1–6 cm distal to rosette; CCo, SCo 5. Basal leaves pinnate Feather-like; pertaining to veins, lobes, leaflets, or other structures arranged in two dimensions (i.e., in one plane) along either side of an axis; a leaf is odd-pinnate if there is a terminal leaflet, even-pinnate if there is not, and either odd- or even-pinnate may be 1-pinnate (blade divided into primary leaflets), 2-pinnate (primary leaflets divided into secondary leaflets), 3-pinnate (secondary leaflets divided into tertiary leaflets), etc. with short linear Elongate, with nearly parallel sides; narrower than elliptic or oblong. to lanceolate Narrowly elongate, widest in the basal half, often tapered to an acute tip. 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. ; heads < 13 mm; mature styles <= sepals; CCo (n Monterey Co.) ..... E. montereyense 5' Basal leaves pinnate with long linear lobes to bipinnate; heads < 40 mm; mature styles > sepals; SCo (San Diego Co.) ..... E. pendletonense 2' Bract margins not thickened, at least outer generally with spines 6. 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 broad to narrow 7. Sepals pinnately lobed or toothed to entire Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). , lanceolate, tapered Gradually (not abruptly) narrower or smaller at base or tip. to tip-spine 8. Bracts spiny on margin and abaxial surface; fruit scales lanceolate, acuminate Having a long-tapered, sharp tip, the sides concave. ..... E. castrense 8' 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 9. Main stem branching 1–5 cm distal to rosette; sepal tips erect; n SNF, se ScV, ne SnJV ..... var. vallicola 9' Main stem 0, plant branched within rosette; sepal tips generally reflexed Abruptly bent or curved downward or backward. ; SCoRO ..... var. vaseyi 6' 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 10. 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 10' Plant decumbent to erect, not rooting nor with juvenile leaves at nodes; inflorescence cyme-like 11' Bracts with 0 or few spines on abaxial surface 12. 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 12' Main stem present, branched distal to base; basal leaves < branches 13' Plant glabrous, or occasionally puberulent only on leaves or bracts; heads > 10-flowered 14. Plant stout, erect; leaf blade tapering to base, petiole obscure; sepal tip-spine generally 1–2 mm; outer bracts > 2 × inner bracts ..... E. jepsonii 14' 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 15' Styles in fruit ± = calyx; SnFrB, SCoR, SW 16' 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, https://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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