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Dryopteris clintoniana (D.C.Eaton) Dowell

Clinton's woodfern (en)

Species

Pteridophytes > Polypodiales > Dryopteridaceae > Dryopteridoideae > Dryopteris

Characteristics

Sterile and fertile lvs similar or only slightly different, evergreen, to 13 dm; petiole to 3.5 dm, scaly at the base, the scales ovate, ca 1 cm, concolorous or with darker brown center; blade lanceolate, commonly 1.5–2 dm wide, pinnate-pinnatifid, ± acuminate; pinnae mostly 10–18 pairs, the larger ones mostly 7–11 × 2–4 cm, short-petiolulate, lance-oblong, acuminate, the 10–15 pairs of segments oblong, 10–23 × 6–9 mm, obtuse, incurved-serrate or biserrate, the teeth subspinulose; veins 5–7 pairs per segment; basal pinnae relatively short and broad-based, mostly 1.5–2.5 times as long as wide; 2n=246, thought to be an alloploid of nos. 3 [Dryopteris cristata (L.) A. Gray] and 5 [Dryopteris goldiana (Hook.) A. Gray]. Swamps and wet woods; Me. and Que. to Wis., s. to N.Y., n. N.J., n. Pa., n. O., and n. Ind.
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Leaves dimorphic, 45--100 × 12--20 cm; fertile leaves dying back in winter; sterile leaves 1--several, smaller, green through winter. Petiole 1/4--1/3 length of leaf, scaly at least at base; scales scattered, tan, sometimes with dark brown center. Blade green, lanceolate, with nearly parallel sides, pinnate-pinnatifid, herbaceous, not glandular. Pinnae of fertile leaves twisted out of plane of blade but not fully perpendicular to it, narrowly elongate-deltate; basal pinnae narrowly elongate-deltate, much reduced; basal pinnules longer than or equal to adjacent pinnules, basal basiscopic pinnule and basal acroscopic pinnule equal; pinnule margins serrate or biserrate, with spiny teeth. Sori midway between midvein and margin of segments. Indusia lacking glands. 2 n = 246.
Life form perennial
Growth form herb
Growth support -
Foliage retention evergreen
Sexuality -
Pollination -
Spread -
Mature width (meter) 0.5 - 1.0
Mature height (meter) 0.48 - 1.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 3-6
Soil humidity 5-7
Soil texture 1-2
Soil acidity 2-8
Soil nutriment -
Hardiness (USDA) 4-8

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by divisions.
Mode divisions
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -35
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Dryopteris clintoniana unspecified picture

Distribution

Dryopteris clintoniana world distribution map, present in Canada and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:17247670-1
WFO ID wfo-0001109078
COL ID 37W5M
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Dryopteris x poyseri Thelypteris clintoniana Dryopteris clintoniana Aspidium cristatum var. clintonianum Dryopteris cristata var. clintoniana Filix cristata var. clintoniana Filix-mas cristata var. clintoniana Thelypteris cristata var. clintoniana
WorldFloraDB 2024