Lomatium observatorium
Encyclopedia
Lomatium observatorium is a rare species of flowering plant in the carrot family
known by the common name Mount Hamilton lomatium. It is endemic to California
, where it is known only from the mountains of Santa Clara County
, including Mount Hamilton
near the Lick Observatory
. It may also occur in Stanislaus County
. Its habitat includes mountain woodlands on volcanic and metamorphosed
sedimentary rock
substrates. The plant was described to science as a new species in 1996.
This is a perennial herb growing low to the ground, the lightly hairy herbage growing from a long taproot
. The leaf blades are up to 12 centimeters long and are intricately divided into many subdivided lobes, the smallest segments linear or lance-shaped and pointed. The blades are borne on petioles
a few centimeters in length. The inflorescence
is an umbel
of one or more clusters of tiny flowers borne on a peduncle
which is very short or elongated, up to 20 centimeters tall.
Apiaceae
The Apiaceae , commonly known as carrot or parsley family, is a group of mostly aromatic plants with hollow stems. The family is large, with more than 3,700 species spread across 434 genera, it is the sixteenth largest family of flowering plants...
known by the common name Mount Hamilton lomatium. It is endemic to 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...
, where it is known only from the mountains of Santa Clara County
Santa Clara County, California
Santa Clara County is a county located at the southern end of the San Francisco Bay Area in the U.S. state of California. As of 2010 it had a population of 1,781,642. The county seat is San Jose. The highly urbanized Santa Clara Valley within Santa Clara County is also known as Silicon Valley...
, including Mount Hamilton
Mount Hamilton (California)
Mount Hamilton is a mountain in California's Diablo Range, in Santa Clara County, California. Mount Hamilton, at is the tallest mountain overlooking Silicon Valley, and is the site of Lick Observatory, the first permanently occupied mountain-top observatory. The various summits along its...
near the Lick Observatory
Lick Observatory
The Lick Observatory is an astronomical observatory, owned and operated by the University of California. It is situated on the summit of Mount Hamilton, in the Diablo Range just east of San Jose, California, USA...
. It may also occur in Stanislaus County
Stanislaus County, California
Stanislaus County is a county located in the Central Valley of the U.S. state of California. As the price of housing has increased in the San Francisco Bay Area, many people who work in the southern reaches of the Bay Area have opted for the longer commute and moved to Stanislaus County for the...
. Its habitat includes mountain woodlands on volcanic and metamorphosed
Metamorphism
Metamorphism is the solid-state recrystallization of pre-existing rocks due to changes in physical and chemical conditions, primarily heat, pressure, and the introduction of chemically active fluids. Mineralogical, chemical and crystallographic changes can occur during this process...
sedimentary rock
Sedimentary rock
Sedimentary rock are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water. Sedimentation is the collective name for processes that cause mineral and/or organic particles to settle and accumulate or minerals to precipitate from a solution....
substrates. The plant was described to science as a new species in 1996.
This is a perennial herb growing low to the ground, the lightly hairy herbage growing from a long taproot
Taproot
A taproot is an enlarged, somewhat straight to tapering plant root that grows vertically downward. It forms a center from which other roots sprout laterally.Plants with taproots are difficult to transplant...
. The leaf blades are up to 12 centimeters long and are intricately divided into many subdivided lobes, the smallest segments linear or lance-shaped and pointed. The blades are borne on petioles
Petiole (botany)
In botany, the petiole is the stalk attaching the leaf blade to the stem. The petiole usually has the same internal structure as the stem. Outgrowths appearing on each side of the petiole are called stipules. Leaves lacking a petiole are called sessile, or clasping when they partly surround the...
a few centimeters in length. The 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...
is an umbel
Umbel
An umbel is an inflorescence which consists of a number of short flower stalks which are equal in length and spread from a common point, somewhat like umbrella ribs....
of one or more clusters of tiny flowers borne on a peduncle
Peduncle (botany)
In botany, a peduncle is a stem supporting an inflorescence, or after fecundation, an infructescence.The peduncle is a stem, usually green and without leaves, though sometimes colored or supporting small leaves...
which is very short or elongated, up to 20 centimeters tall.