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Polystichum kruckebergii
Also called Kruckeberg's Holly Fern, Kruckeberg's Sword Fern, Kruckeberg's Shield Fern
Polystichum kruckebergii is a species of fern known by the common names Kruckeberg's sword fern and Kruckeberg's hollyfern. It is native to western North America from Alaska to Utah to California, where it grows in rocky mountain habitat in subalpine and alpine climates.
This fern produces several narrow, erect leaves 10 to 25 centimeters long. Each leaf is made up of many oval to triangular leaflets, each no more than about 1.5 centimeters long. The leaflets overlap and are somewhat twisted in their axes. Their edges are cut or toothed, the teeth sometimes tipped with spines.
Christmas fern · Hard shield-fern · Aleutian holly fern · Harsh Shield Fern · Polystichum bonapartii · Braun's hollyfern · Polystichum bulbiferum · Monte Guilarte hollyfern · California swordfern · Madeira Shield-Fern · Dudley's swordfern · Polystichum fallax
Text excerpted from the Wikipedia article Polystichum kruckebergii by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
