Eryngium guatemalense (Guatemalan sea holly)
Other names: Guatemalan eryngo, Eryngium cymosum
E. guatemalense is a rosette-forming, tender to borderline hardy, semi-evergreen perennial with spiny, strap-shaped, mid-green leaves and, from summer into autumn, an upright, sturdy, branching stems bearing dense, conical umbels of brown-black flowers surrounded by linear, spiny, grey-green bracts.
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0.75m max. spread |
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1.5m max. height |
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2-5 years to maturity |
Eryngium horridum (Pineapple eryngium)
Other names: Pineapple sea holly
E. horridum is a rosette-forming, evergreen perennial with long, linear, softly-spined, mid-green leaves and branching stems bearing white to pale green, spherical flowerheads in summer.
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0.45m max. spread |
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1m max. height |
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2-5 years to maturity |
Eryngium agavifolium (Agave-leaved sea holly )
Other names: Eryngium bromeliifolium
E. agavifolium is a rosette-forming, evergreen perennial with spiny, glossy, sword-shaped, deep green leaves and, in summer, branched stems bearing pale green to white, cylindrical flowerheads surrounded by spiny bracts.
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1.5m max. spread |
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2m max. height |
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2-5 years to maturity |
Other names: Eryngium paniculatum
E. eburneum is a clump-forming, evergreen perennial with narrowly-linear, spiny, mid-green leaves and, in late summer, arching, branching stems bearing spherical umbels of greenish-white flowers with spiny, lance-shaped bracts.
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0.6m max. spread |
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1.5m max. height |
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2-5 years to maturity |
Eryngium pandanifolium 'Physic Purple' (Giant sea holly 'Physic Purple')
Other names: Eryngium decaisneanum 'Physic Purple'
'Physic Purple' is a tufted, clump-forming, evergreen perennial with a rosette of linear to sword-shaped, spiny, silvery green leaves and, from late summer into autumn, erect, branching stems bearing cone-shaped umbels of dark purple to maroon flowers.
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1m max. spread |
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1.5m max. height |
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2-5 years to maturity |
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