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Narrow Hart's Tongue Fern (Asplenium scolopendrium 'Marginatum' [syn. 'Angustifolium])
Narrow Hart's Tongue Fern (Asplenium scolopendrium 'Marginatum' [syn. 'Angustifolium])
Synonyms: Asplenium scolopendrium ‘Angustifolium’
This form has a narrower blade than the typical species, giving it a seaweed like appearance. Like other tongue ferns, it prefers slightly alkaline soils to maintain a healthy green sheen. The margins of the fronds are generally gently lobed or crenate and in the best forms there is a ridge of tissue running down the middle of the underside of the blade. The most commonly seen form in the trade is one referred to as 'Marginatum Irregulare' by the Victorians due to the uneven nature of the width and undulations of the blade margin. There is also a fimbriate form with fringe like segments on the margin. Martin Rickard's "Plant Finder's Guide to Garden Ferns" has the illustrations of these two forms switched in identity. True Crispum forms are wider ruffled similar to an Elizabethan ruff and do not produce lines of sporangia.
Frond Condition: Evergreen
Mature Height: 6-12"
Origin: English cultivar, UK
Cultural Requirements: Partly Shaded, Full Shade, Evenly Moist, Slightly Moist, Calcium
USDA Zones6, 7, 8, 9
