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Boston fern, narrow swordfern, sword fern, tuber ladder fern, tuber sword fern, tuberous sword fern


scales spreading, concolored.


2.5–10.7 × 0.3–0.7 dm.


0.3–2 dm, moderately to densely scaly;

scales spreading, pale brown throughout.


lacking scales, glabrous (rarely with a few branched hairs abaxially).


reniform to lunate or deltate-rounded, attached along broad sinus, 1.1–1.7 mm wide.


present or absent.


2.2–9 dm, points of pinna attachment 5–12 mm apart;

scales moderately spaced to dense, pale to dark brown, point of attachment distinctly darker.


pinnae oblong to lanceolate-oblong, straight to slightly falcate, 0.9–5 × 0.4–0.9 cm, base auriculate-cordate, acroscopically overlapping rachis, acroscopic lobe deltate, margins entire to serrulate to smoothly crenate, apex acute to bluntly rounded;

costae adaxially glabrous.


= 82.

Nephrolepis cordifolia

Habitat Terrestrial or epiphytic in wet, shady places, limestone ledges, cliffs, rock, roadsides, and often old homesites or waste places, widely escaped from cultivation and only questionably native to any particular region
Elevation 0 m (0 ft)
from FNA
FL; HI; Mexico; Central America; South America; West Indies; Africa; se Asia
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 2.
Parent taxa Dryopteridaceae > Nephrolepis
Sibling taxa
N. biserrata, N. exaltata, N. multiflora, N. ×averyi
Synonyms Polypodium cordifolium, Aspidium cordifolium
Name authority (Linnaeus) C. Presl: Tent. Pterid. 79. (1836)
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