Theodore Charles Hilgard

Euphorbia ocellata is a species of Euphorbia known by the common name Contura Creek sandmat. It is native to the southwestern United States where it grows in many types of habitats. This is a small annual herb with pairs of oblong to lance-shaped leaves, each leaf up to about 1.5 centimeters long. The inflorescence is a cyathium only 2 millimeters wide. It consists of petal-like appendages surrounding the actual flowers, each with a round nectar gland at its base. The appendages are sometimes absent. The flowers include one female flower ringed by up to 60 male flowers. The fruit is a lobed,

Eriogonum heermannii is a species of wild buckwheat known by the common name Heermann's buckwheat. It is native to the southwestern United States from California to Utah where it grows on rocky slopes, desert flats, and dry washes.

Argemone munita is a species of prickly poppy known by the common names flatbud prickly poppy and chicalote. "Munita" means "armed", in reference to the many long prickles. This flower is native to California, where it is widespread throughout the western part of the state and its eastern deserts, on slopes to 10,000 feet, and along roadsides. Its range also extends into Baja California, Arizona, and Nevada. This poppy bears its flowers on erect, spiny stems which can exceed a meter in height. The sap is yellow. The blue-green or mint-green, lobed leaves are also very prickly. The white poppy

Eriogonum roseum is a species of wild buckwheat known by the common name wand buckwheat. It is native to much of western California and the Sierra Nevada foothills, as well as parts of Oregon, and it is widespread and common in several plant communities.

Eriogonum plumatella is a species of wild buckwheat known by the common name yucca buckwheat. It is native to the desert southwest of the United States.

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Clarkia williamsonii is a species of flowering plant endemic to California, where it is known from the forests and woodlands of the northern and central Sierra Nevada foothills.

Malacothamnus marrubioides is a species of flowering plant in the mallow family known by the common name Santa Clarita bushmallow. It is currently only known from Los Angeles and Ventura counties in California, though its purported type locality suggests it may have occurred further north under or near what is now Millerton Lake.

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