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Nephrolepis cordifolia

(Boston Fern)

Overview

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Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in English:

Boston Fern, Erect Sword Fern, Ladder Fern, Narrow Swordfern, Southern Sword Fern, Sword Fern, Tuber Fern, Tuber Ladder Fern, Tuber Sword Fern, Tuberous Sword Fern

Common Names in Japanese:

Tama-Shida

Description

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Genus Nephrolepis

Plants terrestrial , epiphytic, or on rock. Stems ascending to erect , bearing wiry stolons and sometimes underground tubers. Leaves monomorphic , evergreen . Petiole ca. 1/10--1/2 length of blade , base not swollen; vascular bundles more than 3, arranged in an arc, ± round in cross section . Blade narrowly elliptic to linear-lanceolate, 1-pinnate (to 4--5-pinnate in various cultivated forms), very gradually reduced distally to minute pinnatifid apex, often seemingly indeterminate with apex never expanded, herbaceous to papery . Pinnae articulate to rachis, sometimes deciduous, segment (pinna) margins entire, crenulate , or biserrate ; proximal pinnae (usually several pairs) slightly to greatly reduced, sessile, equilateral or inequilateral with basiscopic base excised and often an acroscopic basal auricle ; costae adaxially grooved , grooves not continuous from rachis to costae; indument of linear-lanceolate scales and sometimes multicellular hairs on abaxial and sometimes adaxial surfaces. Veins free , forked . Sori ± round; indusia round-reniform and with deep sinus to semicircular with broad sinus or lunate without sinus and seemingly laterally attached, persistent . Spores brownish, tuberculate to rugose . x = 41.

Species 25--30: widespread in tropical areas.

Nephrolepis often has veins ending in hydathodes and whitish lime-dots adaxially.

Cultivars of Nephrolepis occasionally are found in the wild, where they persist for some time. Numerous forms of N. exaltata cv. `Bostoniensis' and its derivatives are widely cultivated, and the following are known from Florida: N. exaltata cv. `Bostoniensis', N. exaltata cv. `Elegantissima' complex , N. exaltata cv. `Florida Ruffles', N. exaltata cv. `M. P. Mills'.[1]

Physical Description

Species Nephrolepis cordifolia

Stem scales spreading , concolored. Tubers present or absent. Leaves 2.5--10.7 × 0.3--0.7 dm. Petiole 0.3--2 dm, moderately to densely scaly ; scales spreading, pale brown throughout. Blade lacking scales, glabrous (rarely with a few branched hairs abaxially). Rachis 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. Central 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. Indusia reniform to lunate or deltate-rounded, attached along broad sinus , 1.1--1.7 mm wide. 2 n = 82. [source]

Habit: Forb/herb

Flowers: Bloom Period: n/a • Flower Color: inconspicuous, none

Size/Age/Growth

Size: 18-24" tall.

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; 0 m [2].

Typically found at an altitude of 0 to 4,869 meters (0 to 15,974 feet).[3]

Biology

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Reproduction

Duration: Perennial

Growth

Culture: Space 12-15" apart.

Soil: Minimum pH: 5.6 • Maximum pH: 7.8

Sunlight: Sun Exposure: Light Shade.

Temperature: Cold Hardiness: 9b, 10a, 10b, 11. (map)

Taxonomy

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Synonyms

Aspidium cordifolium (Linnaeus) Swartz • Polypodium cordifolium Linnaeus

Notes

Name Status: Accepted Name .

Last scrutiny: 15-Mar-2000

Similar Species

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Members of the genus Nephrolepis

ZipcodeZoo has pages for 34 species, subspecies, varieties, forms, and cultivars in this genus:

N. averyi (Avery's Swordfern) · N. biserrata (Giant Sword Fern) · N. biserrata 'Macho' (Macho Fern) · N. cordifolia (Boston Fern) · N. cordifolia var. Lemon Buttons (Button Sword Fern) · N. cordifolia 'Duffii' (Fishbone Fern) · N. cordifolia 'Timmii' (Timm's Petticoat Fern) · N. exaltata (Boston Fern) · N. exaltata cordifolia (Boston Swordfern) · N. exaltata var. bostoniensis (Boston Fern) · N. exaltata var. Fluffy Ruffles (Sword Fern) · N. exaltata var. Whitmanii (Boston Fern) · N. exaltata 'Aurea' (Golden Boston Fern) · N. exaltata 'Bostoniensis' (Boston Fern) · N. exaltata 'Bostoniensis Aureus' (Golden Boston Fern) · N. exaltata 'Fluffy Ruffles Upright' (Boston Fern) · N. exaltata 'Ruth' (Ruth Fern) · N. exaltata 'Shadow Lace' (Boston Fern) · N. exaltata 'Suzi Wong' (Boston Swordfern) · N. exaltata 'Tiger Fern' (Boston Fern) · N. falcata (Fish Tail Swordfern) · N. falcata 'Fancy Frill' (Fishtail Fern) · N. falcata 'Furcans' (Furcans Fishtail Fern) · N. hirsutula (Scaly Swordfern) · N. laurifolia (Laurel-Leaf Swordfern) · N. multiflora (Asian Swordfern) · N. obliterata (Australian Sword Fern) · N. obliterata 'Kimberly Queen' (Australian Sword Fern) · N. obliterata 'Medusa' (Australian Sword Fern) · N. pectinata (Basket Fern) · N. rivularis (Streamside Swordfern) · N. undulata (Annual Swordfern) · N. x (Avery's Swordfern) · N. × averyi (Avery's Swordfern)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 22, 2007:

Identifiers

Footnotes

  1. Clifton E. Nauman "Nephrolepis". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
  2. "Nephrolepis cordifolia". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
  3. Mean = 1,209.060 meters (3,966.732 feet), Standard Deviation = 1,089.360 based on 337 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/15/2012