Ivesia sericoleuca
Encyclopedia
Ivesia sericoleuca is a species of flowering plant in the rose family
known by the common name Plumas mousetail, or Plumas ivesia. It is native to the northernmost part of the Sierra Nevada and the adjacent Modoc Plateau
in California
. Its range may extend just into Nevada
. This is a small perennial herb forming a tuft on the ground in mountain meadows and scrub. Each leaf is a flat to cylindrical strip of many hairy green leaflets, each individual leaflet 3 to 15 millimeters long and each whole leaf 10 to 20 centimeters long. The mostly naked stem is erect or drooping and reaches a maximum height or length of about 45 centimeters. It bears an inflorescence
of several clusters of hairy flowers. Each flower is just over a centimeter wide, with triangular reddish-green or yellowish sepal
s and round to spoon-shaped white petals. In the center of the flower are usually 20 stamen
s and several pistils
.
Rosaceae
Rosaceae are a medium-sized family of flowering plants, including about 2830 species in 95 genera. The name is derived from the type genus Rosa. Among the largest genera are Alchemilla , Sorbus , Crataegus , Cotoneaster , and Rubus...
known by the common name Plumas mousetail, or Plumas ivesia. It is native to the northernmost part of the Sierra Nevada and the adjacent Modoc Plateau
Modoc Plateau
The Modoc Plateau lies in the northeast corner of California as well as parts of Oregon and Nevada. It is a mile-high expanse of lava flows with cinder cones, juniper flats, pine forests, and seasonal lakes. The plateau is thought to have been formed approximately 25 million years ago...
in 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...
. Its range may extend just into Nevada
Nevada
Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...
. This is a small perennial herb forming a tuft on the ground in mountain meadows and scrub. Each leaf is a flat to cylindrical strip of many hairy green leaflets, each individual leaflet 3 to 15 millimeters long and each whole leaf 10 to 20 centimeters long. The mostly naked stem is erect or drooping and reaches a maximum height or length of about 45 centimeters. It bears an inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
of several clusters of hairy flowers. Each flower is just over a centimeter wide, with triangular reddish-green or yellowish sepal
Sepal
A sepal is a part of the flower of angiosperms . Collectively the sepals form the calyx, which is the outermost whorl of parts that form a flower. Usually green, sepals have the typical function of protecting the petals when the flower is in bud...
s and round to spoon-shaped white petals. In the center of the flower are usually 20 stamen
Stamen
The stamen is the pollen producing reproductive organ of a flower...
s and several pistils
Gynoecium
Gynoecium is most commonly used as a collective term for all carpels in a flower. A carpel is the ovule and seed producing reproductive organ in flowering plants. Carpels are derived from ovule-bearing leaves which evolved to form a closed structure containing the ovules...
.