Polystichum lemmonii
Encyclopedia
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
.
It grows in mountainous habitat on ultramafic rock substrates, often in serpentine soil
s. This fern produces several narrow, erect lance-shaped leaves 10 to 35 centimeters long. Each leaf is made up of many oval leaflets which are overlapping, folded, and twisted such that the leaves may appear almost cylindrical. Their edges are cut or toothed.
Fern
A fern is any one of a group of about 12,000 species of plants belonging to the botanical group known as Pteridophyta. Unlike mosses, they have xylem and phloem . They have stems, leaves, and roots like other vascular plants...
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
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
north to Washington. It is also known from British Columbia
British Columbia
British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...
, where there is a single occurrence in the mountains above the Okanagan Valley
Okanagan
The Okanagan , also known as the Okanagan Valley and sometimes as Okanagan Country is a region located in the Canadian province of British Columbia defined by the basin of Okanagan Lake and the Canadian portion of the Okanagan River. As of 2009, the region's population is approximately 350,927. The...
.
It grows in mountainous habitat on ultramafic rock substrates, often in serpentine soil
Serpentine soil
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....
s. This fern produces several narrow, erect lance-shaped leaves 10 to 35 centimeters long. Each leaf is made up of many oval leaflets which are overlapping, folded, and twisted such that the leaves may appear almost cylindrical. Their edges are cut or toothed.