''Harmonia guggolziorum'' is a rare

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 ...

plant species of plant in the tribe Madieae within the family

Asteraceae The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. It is known by the common names Guggolz tarplant and Guggolzes' harmonia. 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 Mendocino County, California, where it is known from two occurrences near Hopland.California Native Plant Society Rare Plant Profile
/ref> It is a member of the

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 flora and grows in

chaparral Chaparral ( ) is a shrubland plant community and geographical feature found primarily in the U.S. state of California, in southern Oregon, and in the northern portion of the Baja California Peninsula in Mexico. It is shaped by a Mediterranean c ...

habitat. It was only discovered in 2000 and described to science in 2001.Baldwin, B. G. (2001). ''Harmonia guggolziorum'' (Compositae-Madiinae), a new tarweed from ultramafics of southern Mendocino County, California. ''Madroño'' 48:293–297. The plant was named for Jack and Betty Guggolz, the California plant enthusiasts who collected the

type specimen In biology, a type is a particular wiktionary:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to a ...

in 2000. This rare plant is an annual herb producing an erect stem up to 30 centimeters tall, branching in the upper part. The leaves are mostly located around the central part of the stem and near the bases of the upper branches. The leaves are linear and coated in rough hairs and large resin glands. The

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 ...

is a single flower head or a loose cluster of heads each with 3 to 6 yellow ray florets measuring about half a centimeter long.Flora of North America
/ref> The plant may be naturally rare, having evolved on its specific

ultramafic Ultramafic rocks (also referred to as ultrabasic rocks, although the terms are not wholly equivalent) are igneous and meta-igneous rocks with a very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are composed ...

soil type and never having spread beyond.The Nature Conservancy
/ref>

References

External links

Photo gallery
Madieae Endemic flora of California Plants described in 2001 {{Asteroideae-stub