Classification
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All Names

  • Scientific Names
    • Polystichum lemmonii
    • Polystichum mohrioides
  • English
    • Lemmon's holly fern
  • French
    • polystic de Lemmon

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Recent observations

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

hawnzd

Date

October 2, 2016 12:12 PM PDT

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

farpost

Date

September 11, 2016 01:02 PM PDT

Photos / Sounds

What

Lemmon's holly fern Polystichum lemmonii

Observer

marek

Date

September 4, 2016 03:26 PM PDT

Description

OLYMPUS DIGITAL CAMERA

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

bukhal

Date

June 19, 2016 01:34 PM PDT

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

brewbooks

Date

June 29, 2008 01:04 PM PDT

Description

Polystichum lemmonii (Shasta fern)
Traveling from Beverly Creek on the way up to Iron Peak
Iron Peak Trail 1399, ~1500 meters (4900 feet)
Kittitas Co. Washington, USA

i062908 419

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

abr

Date

August 12, 2012 02:28 PM PDT

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

brewbooks

Date

September 8, 2013 01:49 PM PDT

Description

Polystichum lemmonii Shasta Fern on Serpentine

Map of area

s20130909 465

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

brewbooks

Date

July 19, 2008 11:18 AM PDT

Description

Polystichum lemmonii the signature fern for serpentine soil

Arthur Kruckeberg: "Of the western ferns on serpentine, only Polystichum lemmonii is obligate,"
Source Hardy Fern Library

Dryopteridaceae
Fern
Lemmon's holly-fern, Shasta fern

A serpentine soil is derived from ultramafic rocks, in particular serpentinite, a rock formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle.
The soils derived from ultramafic bedrock give rise to unusual and sparse associations of edaphic (and often endemic) plants that are tolerant of extreme soil conditions, including:
low calcium:magnesium ratio
lack of essential nutrients such as nitrogen, potassium, and phosphorus and
high concentrations of the heavy metals (more common in ultramafic rocks)

These plants are commonly called serpentine endemics, if they grow only on these soils. (Serpentinite is composed of the mineral serpentine, but the two terms are often both used to mean the rock, not its mineral composition.)

Source: en.wikipedia.org/wiki/Serpentine_soil accessed 14 Aug 2010

Esmerelda Basin
Teanaway, Kittitas Co. Washington, USA
On serpentine rock and soil
i071908 067

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

brewbooks

Date

August 8, 2009 12:19 PM PDT

Description

Although I wonder if this might be Polystichum kruckebergii; Kruckeberg's Sword Fern ???

Polystichum lemmonii the signature fern for serpentine soil

Arthur Kruckeberg: "Of the western ferns on serpentine, only Polystichum lemmonii is obligate,"
Source Hardy Fern Library

Dryopteridaceae
Fern
Lemmon's holly-fern, Shasta fern

A serpentine soil is derived from ultramafic rocks, in particular serpentinite, a rock formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle.
The soils derived from ultramafic bedrock give rise to unusual and sparse associations of edaphic (and often endemic) plants that are tolerant of extreme soil conditions, including:
low calcium:magnesium ratio
lack of essential nutrients such as nitrogen, potassium, and phosphorus and
high concentrations of the heavy metals (more common in ultramafic rocks)

These plants are commonly called serpentine endemics, if they grow only on these soils. (Serpentinite is composed of the mineral serpentine, but the two terms are often both used to mean the rock, not its mineral composition.)

Source: en.wikipedia.org/wiki/Serpentine_soil accessed 14 Aug 2010

Dryopteridaceae
Fern
Lemmon's holly-fern, Shasta fern

Ingalls Lake trail, Teanaway, Kittitas County, Washington, USA
next to a large serpentine rock
My other Shasta Fern photos

i090909 280

Tags

Photos / Sounds

Square

What

Lemmon's holly fern Polystichum lemmonii

Observer

brewbooks

Date

August 8, 2009 10:29 AM PDT

Description

Polystichum lemmonii the signature fern for serpentine soil growing with Castilleja elmeri

Arthur Kruckeberg: "Of the western ferns on serpentine, only Polystichum lemmonii is obligate,"
Source Hardy Fern Library

Dryopteridaceae
Fern
Lemmon's holly-fern, Shasta fern

A serpentine soil is derived from ultramafic rocks, in particular serpentinite, a rock formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle.
The soils derived from ultramafic bedrock give rise to unusual and sparse associations of edaphic (and often endemic) plants that are tolerant of extreme soil conditions, including:
low calcium:magnesium ratio
lack of essential nutrients such as nitrogen, potassium, and phosphorus and
high concentrations of the heavy metals (more common in ultramafic rocks)

These plants are commonly called serpentine endemics, if they grow only on these soils. (Serpentinite is composed of the mineral serpentine, but the two terms are often both used to mean the rock, not its mineral composition.)

Source: en.wikipedia.org/wiki/Serpentine_soil accessed 14 Aug 2010

On serpentine rock and soil, Ingalls Lake trail, Kittitas County, Washington, USA

i090909 228

Photos / Sounds

What

Lemmon's holly fern Polystichum lemmonii

Observer

brewbooks

Date

August 8, 2009 10:12 AM PDT

Description

Polystichum lemmonii the signature fern for serpentine soil

Arthur Kruckeberg: "Of the western ferns on serpentine, only Polystichum lemmonii is obligate,"
Source Hardy Fern Library

Dryopteridaceae
Fern
Lemmon's holly-fern, Shasta fern

A serpentine soil is derived from ultramafic rocks, in particular serpentinite, a rock formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle.
The soils derived from ultramafic bedrock give rise to unusual and sparse associations of edaphic (and often endemic) plants that are tolerant of extreme soil conditions, including:
low calcium:magnesium ratio
lack of essential nutrients such as nitrogen, potassium, and phosphorus and
high concentrations of the heavy metals (more common in ultramafic rocks)

These plants are commonly called serpentine endemics, if they grow only on these soils. (Serpentinite is composed of the mineral serpentine, but the two terms are often both used to mean the rock, not its mineral composition.)

Source: en.wikipedia.org/wiki/Serpentine_soil accessed 14 Aug 2010

On serpentine rock and soil, Ingalls Lake trail, Kittitas County, Washington, USA

i090909 225

Tags

Photos / Sounds

What

Lemmon's holly fern Polystichum lemmonii

Observer

brewbooks

Date

August 29, 2009 12:53 PM PDT

Description

Polystichum lemmonii the signature fern for serpentine soil

Arthur Kruckeberg: "Of the western ferns on serpentine, only Polystichum lemmonii is obligate,"
Source Hardy Fern Library

Dryopteridaceae
Fern
Lemmon's holly-fern, Shasta fern

A serpentine soil is derived from ultramafic rocks, in particular serpentinite, a rock formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle.
The soils derived from ultramafic bedrock give rise to unusual and sparse associations of edaphic (and often endemic) plants that are tolerant of extreme soil conditions, including:
low calcium:magnesium ratio
lack of essential nutrients such as nitrogen, potassium, and phosphorus and
high concentrations of the heavy metals (more common in ultramafic rocks)

These plants are commonly called serpentine endemics, if they grow only on these soils. (Serpentinite is composed of the mineral serpentine, but the two terms are often both used to mean the rock, not its mineral composition.)

Source: en.wikipedia.org/wiki/Serpentine_soil accessed 14 Aug 2010

descending from Long's Pass, in serpentine soil, Kittitas County, Washington, USA

i090909 766

View all observations

Description from Wikipedia

Polystichum lemmonii is a species of fern known by the common names Lemmon's holly fern and Shasta fern. It is native to western North America from the Sierra Nevada of California north to Washington. It is also known from British Columbia, where there is a single occurrence in the mountains above the Okanagan Valley.

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Conservation Summary

No range data available.
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