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Onoclea sensibilis Linnaeus
SENSITIVE FERN
Life   Plantae   Pteridophyta   Dryopteridaceae   Onoclea

Onoclea sensibilis, Sensitive Fern Fertie stalk
© Copyright Sheryl Pollock 2011 · 5
Onoclea sensibilis, Sensitive Fern Fertie stalk

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Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern
Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern

Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern
Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern

Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern
Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern

Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern
Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern

Onoclea sensibilis, Sensitive Fern
© Copyright Bobby Hattaway 2011 · 5
Onoclea sensibilis, Sensitive Fern
Onoclea sensibilis
© Copyright Bobby Hattaway 2011 · 3
Onoclea sensibilis

Onoclea sensibilis, Sensitive fern
© Graham Wyatt, 2009-2010 · 1
Onoclea sensibilis, Sensitive fern
Onoclea sensibilis, Sensitive fern
© Graham Wyatt, 2009-2010 · 1
Onoclea sensibilis, Sensitive fern

Onoclea sensibilis, Sensitive fern
© Graham Wyatt, 2009-2010 · 1
Onoclea sensibilis, Sensitive fern
Onoclea sensibilis, Sensitive fern
© Graham Wyatt, 2009-2010 · 1
Onoclea sensibilis, Sensitive fern

Associates · map
FamilyScientific name @ source (records)
Aphididae  Amphorophora ampullata @ AMNH_PBI (4)
Dermateaceae  Gloeosporium phegopteridis @ BPI (7)
Dothioraceae  Metasphaeria epipteridea @ BPI (1)
Melampsoraceae  Melampsora scolopendrii @ BPI (2)
Mycosphaerellaceae  Septoria mirabilis @ BPI (2)
Pucciniastraceae  Uredinopsis americana @ 876086B (1); 876086A (1); BPI (19); 876086C (1)

Uredinopsis mirabilis @ BPI (204)

Uredinopsis scolopendrii @ BPI (1)

Uredinopsis @ 847122B (1)
Rhytismataceae  Hypoderma aquilinum @ BPI (2)
Sebacinaceae  Sebacina incrustans @ BPI (1)
Taphrinaceae  Taphrina hiratsukae @ BPI (4)

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Following modified from Flora of North America
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FNA | Family List | FNA Vol. 2 | Dryopteridaceae | Onoclea

1. Onoclea sensibilis Linnaeus, Sp. Pl. 2: 1062. 1753.

Sensitive fern, onoclée sensible

Onoclea sensibilis forma hemiphyllodes (Kiss & Kümmerle) Gilbert; O . sensibilis forma obtusilobata (Schkuhr) Gilbert; O . sensibilis var. obtusilobata (Schkuhr) Torrey

Leaves irregularly spaced along stem. Sterile leaves yellow-green, deltate, coarsely divided, 13--34 × 15--30 cm. Petiole of sterile leaf black, 22--58 cm, flattened at base; rachis winged, becoming broader toward apex. Pinnae 5--11 per side, lanceolate; proximal pinnae 9--18 cm, margins entire, sinuate, or laciniate. Sporophyll leaves green, becoming black at maturity, oblong, 7--17 × 1--4 cm. Petiole 19--40 cm, base sparsely scaly. Pinnae linear, 5--11 per side, 2.5--5 cm; ultimate segments revolute to form beadlike structures, 2--4 mm diam. Sori borne on free veins, enclosed by ultimate segments. 2 n = 74.

Sporophylls produced May--October. Open swamps, thickets, marshes, or low woods, in sunny or shaded locations, often forming thick stands; 0--1500 m; St. Pierre and Miquelon; Man., N.B., Nfld., N.S., Ont., P.E.I., Que.; Ala., Ark., Colo., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis., Wyo.; e Asia.

Onoclea sensibilis occurs in eastern North America, principally east of the Great Plains. Leaf forms with pinnae intermediate between those of sporophylls and sterile leaves, or with pinnae fertile only on one side of the blade, can occur on plants that also bear normal leaf forms. These do not merit taxonomic recognition (J. M. Beitel et al. 1981).

Onoclea sensibilis resembles Woodwardia areolata (Linnaeus) T. Moore, with which it often grows. Onoclea has entire pinna margins and nearly opposite basal pinnae whereas Woodwardia areolata has serrate pinna margins and alternate pinnae.

As in Matteuccia struthiopteris (Linnaeus) Todaro, sporophylls of Onoclea sensibilis persist through the winter and release the green spores in spring before the sterile leaves expand (R. W. Hill and W. H. Wagner Jr. 1974; L. G. Labouriau 1958; R. M. Lloyd and E. J. Klekowski Jr. 1970). Onoclea sensibilis is occasionally cultivated; it has a tendency to spread rapidly and become weedy. The name "sensitive fern" refers to the susceptibility of the leaves to even a light frost.

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Onoclea+sensibilis&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Onoclea+sensibilis&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 25
Query: SELECT * FROM img WHERE ready=1 and taxon like "Onoclea sensibilis%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 0000 1003 0097 [detail]
© 2003 Joseph Dougherty/ecology.org

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 0000 1003 0098 [detail]
© 2003 Joseph Dougherty/ecology.org

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0105 0765 [detail]
© 2005 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0105 0766 [detail]
© 2005 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0506 2483 [detail]
© 2006 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0107 1192 [detail]
© 2007 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0107 1194 [detail]
© 2007 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0107 1195 [detail]
© 2007 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
ID: 3333 1111 1107 0035 [detail]
© University and Jepson Herbaria

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0408 2092 [detail]
© 2008 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0408 2093 [detail]
© 2008 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0609 2167 [detail]
© 2009 Trent M. Draper

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0609 2168 [detail]
© 2009 Trent M. Draper

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0609 2169 [detail]
© 2009 Trent M. Draper

Onoclea sensibilis
Onoclea sensibilis
ID: 0000 0000 0610 0022 [detail]
© 2010 Louis-M. Landry

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3818 [detail]
© 2016 Keir Morse

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3819 [detail]
© 2016 Keir Morse

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3820 [detail]
© 2016 Keir Morse

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3821 [detail]
© 2016 Keir Morse

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3822 [detail]
© 2016 Keir Morse

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3823 [detail]
© 2016 Keir Morse

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3824 [detail]
© 2016 Keir Morse

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3825 [detail]
© 2016 Keir Morse

Onoclea sensibilis
Onoclea sensibilis
Sensitive Fern
ID: 0000 1111 1234 3826 [detail]
© 2016 Keir Morse

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


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