''Ivesia pickeringii'' is an uncommon species of flowering plant in the rose family known by the common names silky mousetail and Pickering's ivesia. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the Klamath Mountains of northern

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

where it is a plant of mountain meadows, often on

serpentine soil Serpentine soil is an uncommon soil type produced by weathered ultramafic rock such as peridotite and its metamorphic derivatives such as serpentinite. More precisely, serpentine soil contains minerals of the serpentine subgroup, especially anti ...

s. This is a perennial herb forming tufts of long, erect leaves and thin, naked stems. Each leaf is a taillike strip of overlapping lobed leaflets. The reddish to greenish stems reach 30 to 50 centimeters in height and bear

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. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...

s of clustered flowers. The stems, leaves, and

s are all covered in fuzzy white to gray hairs. Each flower is about a centimeter wide, with pinkish-green triangular

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

s and longer, narrower pink or purple petals. In the center of the flower are 20

stamen The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filame ...

s and a few

pistils Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' ...

References

External links

Jepson Manual TreatmentPhoto gallery
pickeringii Flora of California {{Rosaceae-stub